TY  - JOUR
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Fahrenholtz, William G.
AU  - Marinkovic, Bojan A.
AU  - Rogan, Jelena
AU  - Lević, Steva
AU  - Đorđević, Antonije
AU  - Pavlović, Vladimir B.
UR  - https://doiserbia.nb.rs/Article.aspx?ID=0350-820X2301001O
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6372
AB  - Magnesium aluminate has the spinel structure along with good mechanical, chemical, and thermal properties. Magnesium aluminate has a wide range of applications including refractory ceramics, optically transparent ceramic windows, and armors. Its low dielectric permeability and low loss tangent enable its applications for integrated electronic devices, as well. In this paper, MgO and Al2O3 powders were mixed in a one-to-one molar ratio and calcined at temperatures ranging from 1500 to 1800o C to produce phase pure spinel. Thereafter, pellets were crushed and treated in a planetary ball mill for 60 min to obtain a fine powder. All powders were examined for phase composition, crystal structure, and morphology. The obtained results showed that by increasing the temperature, samples with higher density were synthesized. Milling for 1 h led to formation of larger particles, but finer powders after milling. XRPD and Raman spectroscopy showed disorder in the crystal structure after milling.
T2  - Science of Sintering, 55 (2023) 1-10
T1  - Morphological and structural characterization of MgAl2O4 spinel.
DO  - 10.2298/SOS2301001O
ER  - 

@article{
author = "Obradović, Nina and Filipović, Suzana and Fahrenholtz, William G. and Marinkovic, Bojan A. and Rogan, Jelena and Lević, Steva and Đorđević, Antonije and Pavlović, Vladimir B.",
abstract = "Magnesium aluminate has the spinel structure along with good mechanical, chemical, and thermal properties. Magnesium aluminate has a wide range of applications including refractory ceramics, optically transparent ceramic windows, and armors. Its low dielectric permeability and low loss tangent enable its applications for integrated electronic devices, as well. In this paper, MgO and Al2O3 powders were mixed in a one-to-one molar ratio and calcined at temperatures ranging from 1500 to 1800o C to produce phase pure spinel. Thereafter, pellets were crushed and treated in a planetary ball mill for 60 min to obtain a fine powder. All powders were examined for phase composition, crystal structure, and morphology. The obtained results showed that by increasing the temperature, samples with higher density were synthesized. Milling for 1 h led to formation of larger particles, but finer powders after milling. XRPD and Raman spectroscopy showed disorder in the crystal structure after milling.",
journal = "Science of Sintering, 55 (2023) 1-10",
title = "Morphological and structural characterization of MgAl2O4 spinel.",
doi = "10.2298/SOS2301001O"
}

Obradović, N., Filipović, S., Fahrenholtz, W. G., Marinkovic, B. A., Rogan, J., Lević, S., Đorđević, A.,& Pavlović, V. B..Morphological and structural characterization of MgAl2O4 spinel.. in Science of Sintering, 55 (2023) 1-10.
https://doi.org/10.2298/SOS2301001O

Obradović N, Filipović S, Fahrenholtz WG, Marinkovic BA, Rogan J, Lević S, Đorđević A, Pavlović VB. Morphological and structural characterization of MgAl2O4 spinel.. in Science of Sintering, 55 (2023) 1-10..
doi:10.2298/SOS2301001O .

Obradović, Nina, Filipović, Suzana, Fahrenholtz, William G., Marinkovic, Bojan A., Rogan, Jelena, Lević, Steva, Đorđević, Antonije, Pavlović, Vladimir B., "Morphological and structural characterization of MgAl2O4 spinel." in Science of Sintering, 55 (2023) 1-10,
https://doi.org/10.2298/SOS2301001O . .

TY  - JOUR
AU  - Janićijević, Aleksandra
AU  - Pavlović, Vera P.
AU  - Kovačević, Danijela
AU  - Perić, Marko
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir
AU  - Filipović, Suzana
PY  - 2022
UR  - https://www.mdpi.com/2073-4360/14/9/1819
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6095
AB  - The rise of innovation in the electrical industry is driven by the controlled design of new materials. The hybrid materials based on magnetite/nanocellulose are highly interesting due to their various applications in medicine, ecology, catalysis and electronics. In this study, the structure and morphology of nanocellulose/magnetite hybrid nanomaterials were investigated. The effect of nanocellulose loading on the crystal structure of synthesized composites was investigated by XRD and FTIR methods. The presented study reveals that the interaction between the cellulose and magnetic nanoparticles depends on the nanocellulose content. Further, a transition from cellulose II to cellulose I allomorph is observed. SEM and EDS are employed to determine the variation in morphology with changes in component concentrations. By the calculation of magnetic interactions between adjacent Fe3+ and Fe2+ ions within composites, it is determined that ferromagnetic coupling predominates.
T2  - Polymers
T2  - Polymers
T1  - Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials
IS  - 9
SP  - 1819
VL  - 14
DO  - 10.3390/polym14091819
ER  - 

@article{
author = "Janićijević, Aleksandra and Pavlović, Vera P. and Kovačević, Danijela and Perić, Marko and Vlahović, Branislav and Pavlović, Vladimir and Filipović, Suzana",
year = "2022",
abstract = "The rise of innovation in the electrical industry is driven by the controlled design of new materials. The hybrid materials based on magnetite/nanocellulose are highly interesting due to their various applications in medicine, ecology, catalysis and electronics. In this study, the structure and morphology of nanocellulose/magnetite hybrid nanomaterials were investigated. The effect of nanocellulose loading on the crystal structure of synthesized composites was investigated by XRD and FTIR methods. The presented study reveals that the interaction between the cellulose and magnetic nanoparticles depends on the nanocellulose content. Further, a transition from cellulose II to cellulose I allomorph is observed. SEM and EDS are employed to determine the variation in morphology with changes in component concentrations. By the calculation of magnetic interactions between adjacent Fe3+ and Fe2+ ions within composites, it is determined that ferromagnetic coupling predominates.",
journal = "Polymers, Polymers",
title = "Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials",
number = "9",
pages = "1819",
volume = "14",
doi = "10.3390/polym14091819"
}

Janićijević, A., Pavlović, V. P., Kovačević, D., Perić, M., Vlahović, B., Pavlović, V.,& Filipović, S.. (2022). Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials. in Polymers, 14(9), 1819.
https://doi.org/10.3390/polym14091819

Janićijević A, Pavlović VP, Kovačević D, Perić M, Vlahović B, Pavlović V, Filipović S. Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials. in Polymers. 2022;14(9):1819.
doi:10.3390/polym14091819 .

Janićijević, Aleksandra, Pavlović, Vera P., Kovačević, Danijela, Perić, Marko, Vlahović, Branislav, Pavlović, Vladimir, Filipović, Suzana, "Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials" in Polymers, 14, no. 9 (2022):1819,
https://doi.org/10.3390/polym14091819 . .

TY  - JOUR
AU  - Mirković, Miljana
AU  - Filipović, Suzana
AU  - Kalijadis, Ana
AU  - Mašković, Pavle
AU  - Mašković, Jelena
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir
PY  - 2022
UR  - https://www.mdpi.com/2079-6382/11/5/592
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6096
AB  - Due to the growing number of people infected with the new coronavirus globally, which weakens immunity, there has been an increase in bacterial infections. Hence, knowledge about simple and low-cost synthesis methods of materials with good structural and antimicrobial properties is of great importance. A material obtained through the combination of a nanoscale hydroxyapatite material (with good biocompatibility) and titanium dioxide (with good degradation properties of organic molecules) can absorb and decompose bacteria. In this investigation, three different synthesis routes used to prepare hydroxyapatite/titanium dioxide nanomaterials are examined. The morphology and semiquantitative chemical composition are characterized by scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX). The obtained materials’ phase and structural characterization are determined using the X-ray powder diffraction method (XRD). The crystallite sizes of the obtained materials are in the range of 8 nm to 15 nm. Based on XRD peak positions, the hexagonal hydroxyapatite phases are formed in all samples along with TiO2 anatase and rutile phases. According to SEM and TEM analyses, the morphology of the prepared samples differs depending on the synthesis route. The EDX analysis confirmed the presence of Ti, Ca, P, and O in the obtained materials. The IR spectroscopy verified the vibration bands characteristic for HAp and titanium. The investigated materials show excellent antimicrobial and photocatalytic properties.
T2  - Antibiotics
T2  - Antibiotics
T1  - Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties
IS  - 5
SP  - 592
VL  - 11
DO  - 10.3390/antibiotics11050592
ER  - 

@article{
author = "Mirković, Miljana and Filipović, Suzana and Kalijadis, Ana and Mašković, Pavle and Mašković, Jelena and Vlahović, Branislav and Pavlović, Vladimir",
year = "2022",
abstract = "Due to the growing number of people infected with the new coronavirus globally, which weakens immunity, there has been an increase in bacterial infections. Hence, knowledge about simple and low-cost synthesis methods of materials with good structural and antimicrobial properties is of great importance. A material obtained through the combination of a nanoscale hydroxyapatite material (with good biocompatibility) and titanium dioxide (with good degradation properties of organic molecules) can absorb and decompose bacteria. In this investigation, three different synthesis routes used to prepare hydroxyapatite/titanium dioxide nanomaterials are examined. The morphology and semiquantitative chemical composition are characterized by scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX). The obtained materials’ phase and structural characterization are determined using the X-ray powder diffraction method (XRD). The crystallite sizes of the obtained materials are in the range of 8 nm to 15 nm. Based on XRD peak positions, the hexagonal hydroxyapatite phases are formed in all samples along with TiO2 anatase and rutile phases. According to SEM and TEM analyses, the morphology of the prepared samples differs depending on the synthesis route. The EDX analysis confirmed the presence of Ti, Ca, P, and O in the obtained materials. The IR spectroscopy verified the vibration bands characteristic for HAp and titanium. The investigated materials show excellent antimicrobial and photocatalytic properties.",
journal = "Antibiotics, Antibiotics",
title = "Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties",
number = "5",
pages = "592",
volume = "11",
doi = "10.3390/antibiotics11050592"
}

Mirković, M., Filipović, S., Kalijadis, A., Mašković, P., Mašković, J., Vlahović, B.,& Pavlović, V.. (2022). Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties. in Antibiotics, 11(5), 592.
https://doi.org/10.3390/antibiotics11050592

Mirković M, Filipović S, Kalijadis A, Mašković P, Mašković J, Vlahović B, Pavlović V. Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties. in Antibiotics. 2022;11(5):592.
doi:10.3390/antibiotics11050592 .

Mirković, Miljana, Filipović, Suzana, Kalijadis, Ana, Mašković, Pavle, Mašković, Jelena, Vlahović, Branislav, Pavlović, Vladimir, "Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties" in Antibiotics, 11, no. 5 (2022):592,
https://doi.org/10.3390/antibiotics11050592 . .

TY  - JOUR
AU  - Šuljagić, Marija
AU  - Vulić, Predrag
AU  - Jeremić, Dejan
AU  - Pavlović, Vladimir
AU  - Filipović, Suzana
AU  - Kilanski, Lukasz
AU  - Lewinska, Sabina
AU  - Slawska-Waniewska, Anna
AU  - Milenković, Milica
AU  - Nikolić, Aleksandar S.
AU  - Anđelković, Ljubica
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/9515
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5759
AB  - To investigate the magnetic behavior of starch-coated cobalt ferrites, well-established synthetic methods, i.e., coprecipitation, mechanochemical, ultrasonically assisted coprecipitation, microemulsion, and microwave-assisted hydrothermal syntheses were chosen for their preparation. The obtained materials had pure single-phase spinel structures. Scanning and transmission electron microscopy analyses revealed that the morphology of the samples is not uniform, and particle aggregation is a dominant process. Fourier transform infrared spectra and thermogravimetric analysis confirmed the presence of starch in all–coated samples. The unusually higher saturation magnetization of starch-coated samples than their as-prepared analogs, obtained by coprecipitation, ultrasonically assisted coprecipitation, and microwave-assisted hydrothermal methods, might be explained by the Ostwald ripening mechanism induced by the coating process. A decrease in magnetization was noticed for the starch-functionalized nanomaterials synthesized by mechanochemical and microemulsion methods, in comparison to their as-prepared analogs, i.e., the size distribution of such nanoparticles is narrow, and the average diameter of the grains is near critical for the Ostwald ripening process.
PB  - Elsevier
T2  - Materials Research Bulletin
T1  - The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods
SP  - 111117
VL  - 134
DO  - 10.1016/j.materresbull.2020.111117
ER  - 

@article{
author = "Šuljagić, Marija and Vulić, Predrag and Jeremić, Dejan and Pavlović, Vladimir and Filipović, Suzana and Kilanski, Lukasz and Lewinska, Sabina and Slawska-Waniewska, Anna and Milenković, Milica and Nikolić, Aleksandar S. and Anđelković, Ljubica",
year = "2021",
abstract = "To investigate the magnetic behavior of starch-coated cobalt ferrites, well-established synthetic methods, i.e., coprecipitation, mechanochemical, ultrasonically assisted coprecipitation, microemulsion, and microwave-assisted hydrothermal syntheses were chosen for their preparation. The obtained materials had pure single-phase spinel structures. Scanning and transmission electron microscopy analyses revealed that the morphology of the samples is not uniform, and particle aggregation is a dominant process. Fourier transform infrared spectra and thermogravimetric analysis confirmed the presence of starch in all–coated samples. The unusually higher saturation magnetization of starch-coated samples than their as-prepared analogs, obtained by coprecipitation, ultrasonically assisted coprecipitation, and microwave-assisted hydrothermal methods, might be explained by the Ostwald ripening mechanism induced by the coating process. A decrease in magnetization was noticed for the starch-functionalized nanomaterials synthesized by mechanochemical and microemulsion methods, in comparison to their as-prepared analogs, i.e., the size distribution of such nanoparticles is narrow, and the average diameter of the grains is near critical for the Ostwald ripening process.",
publisher = "Elsevier",
journal = "Materials Research Bulletin",
title = "The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods",
pages = "111117",
volume = "134",
doi = "10.1016/j.materresbull.2020.111117"
}

Šuljagić, M., Vulić, P., Jeremić, D., Pavlović, V., Filipović, S., Kilanski, L., Lewinska, S., Slawska-Waniewska, A., Milenković, M., Nikolić, A. S.,& Anđelković, L.. (2021). The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods. in Materials Research Bulletin
Elsevier., 134, 111117.
https://doi.org/10.1016/j.materresbull.2020.111117

Šuljagić M, Vulić P, Jeremić D, Pavlović V, Filipović S, Kilanski L, Lewinska S, Slawska-Waniewska A, Milenković M, Nikolić AS, Anđelković L. The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods. in Materials Research Bulletin. 2021;134:111117.
doi:10.1016/j.materresbull.2020.111117 .

Šuljagić, Marija, Vulić, Predrag, Jeremić, Dejan, Pavlović, Vladimir, Filipović, Suzana, Kilanski, Lukasz, Lewinska, Sabina, Slawska-Waniewska, Anna, Milenković, Milica, Nikolić, Aleksandar S., Anđelković, Ljubica, "The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods" in Materials Research Bulletin, 134 (2021):111117,
https://doi.org/10.1016/j.materresbull.2020.111117 . .

TY  - JOUR
AU  - Šuljagić, Marija
AU  - Vulić, Predrag
AU  - Jeremić, Dejan
AU  - Pavlović, Vladimir
AU  - Filipović, Suzana
AU  - Kilanski, Lukasz
AU  - Lewinska, Sabina
AU  - Slawska-Waniewska, Anna
AU  - Milenković, Milica
AU  - Nikolić, Aleksandar S.
AU  - Anđelković, Ljubica
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/9514
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5758
AB  - To investigate the magnetic behavior of starch-coated cobalt ferrites, well-established synthetic methods, i.e., coprecipitation, mechanochemical, ultrasonically assisted coprecipitation, microemulsion, and microwave-assisted hydrothermal syntheses were chosen for their preparation. The obtained materials had pure single-phase spinel structures. Scanning and transmission electron microscopy analyses revealed that the morphology of the samples is not uniform, and particle aggregation is a dominant process. Fourier transform infrared spectra and thermogravimetric analysis confirmed the presence of starch in all–coated samples. The unusually higher saturation magnetization of starch-coated samples than their as-prepared analogs, obtained by coprecipitation, ultrasonically assisted coprecipitation, and microwave-assisted hydrothermal methods, might be explained by the Ostwald ripening mechanism induced by the coating process. A decrease in magnetization was noticed for the starch-functionalized nanomaterials synthesized by mechanochemical and microemulsion methods, in comparison to their as-prepared analogs, i.e., the size distribution of such nanoparticles is narrow, and the average diameter of the grains is near critical for the Ostwald ripening process.
PB  - Elsevier
T2  - Materials Research Bulletin
T1  - The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods
SP  - 111117
VL  - 134
DO  - 10.1016/j.materresbull.2020.111117
ER  - 

@article{
author = "Šuljagić, Marija and Vulić, Predrag and Jeremić, Dejan and Pavlović, Vladimir and Filipović, Suzana and Kilanski, Lukasz and Lewinska, Sabina and Slawska-Waniewska, Anna and Milenković, Milica and Nikolić, Aleksandar S. and Anđelković, Ljubica",
year = "2021",
abstract = "To investigate the magnetic behavior of starch-coated cobalt ferrites, well-established synthetic methods, i.e., coprecipitation, mechanochemical, ultrasonically assisted coprecipitation, microemulsion, and microwave-assisted hydrothermal syntheses were chosen for their preparation. The obtained materials had pure single-phase spinel structures. Scanning and transmission electron microscopy analyses revealed that the morphology of the samples is not uniform, and particle aggregation is a dominant process. Fourier transform infrared spectra and thermogravimetric analysis confirmed the presence of starch in all–coated samples. The unusually higher saturation magnetization of starch-coated samples than their as-prepared analogs, obtained by coprecipitation, ultrasonically assisted coprecipitation, and microwave-assisted hydrothermal methods, might be explained by the Ostwald ripening mechanism induced by the coating process. A decrease in magnetization was noticed for the starch-functionalized nanomaterials synthesized by mechanochemical and microemulsion methods, in comparison to their as-prepared analogs, i.e., the size distribution of such nanoparticles is narrow, and the average diameter of the grains is near critical for the Ostwald ripening process.",
publisher = "Elsevier",
journal = "Materials Research Bulletin",
title = "The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods",
pages = "111117",
volume = "134",
doi = "10.1016/j.materresbull.2020.111117"
}

Šuljagić, M., Vulić, P., Jeremić, D., Pavlović, V., Filipović, S., Kilanski, L., Lewinska, S., Slawska-Waniewska, A., Milenković, M., Nikolić, A. S.,& Anđelković, L.. (2021). The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods. in Materials Research Bulletin
Elsevier., 134, 111117.
https://doi.org/10.1016/j.materresbull.2020.111117

Šuljagić M, Vulić P, Jeremić D, Pavlović V, Filipović S, Kilanski L, Lewinska S, Slawska-Waniewska A, Milenković M, Nikolić AS, Anđelković L. The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods. in Materials Research Bulletin. 2021;134:111117.
doi:10.1016/j.materresbull.2020.111117 .

Šuljagić, Marija, Vulić, Predrag, Jeremić, Dejan, Pavlović, Vladimir, Filipović, Suzana, Kilanski, Lukasz, Lewinska, Sabina, Slawska-Waniewska, Anna, Milenković, Milica, Nikolić, Aleksandar S., Anđelković, Ljubica, "The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods" in Materials Research Bulletin, 134 (2021):111117,
https://doi.org/10.1016/j.materresbull.2020.111117 . .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Andjelković, Lj.
AU  - Jeremić, D.
AU  - Vulić, Predrag J.
AU  - Nikolić, A.S.
AU  - Marković, S.
AU  - Paunović, V
AU  - Lević, Steva
AU  - Pavlović, Vladimir
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5323
AB  - Barium titanate (BaTiO3) attracts high scientific and technological attention due to good dielectric and electromechanical properties. Although BaTiO3 is one of the most frequently investigated ferroelectric materials, the need for finding new and/or improved synthesis methods of this material still exists. In this paper, a novel, mild synthesis route for producing tetragonal BaTiO3 from barium nitrate and Ti-oxalate precursor is presented. Morphology of the prepared and subsequently sintered BaTiO3 was determined by SEM. Particle size distribution of the as prepared powder was monitored by the laser diffraction. The phase composition, structure and lattice dynamics were investigated by XRD and Raman spectroscopy. Finally, dielectric parameters were determined in the temperature range from 30 to 180 degrees C, and within a variety of frequencies. Curie temperature was detected at 130 degrees C.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Structure and Properties of Nanocrystalline Tetragonal BaTiO3 Prepared by Combustion Solid State Synthesis
EP  - 268
IS  - 3
SP  - 257
VL  - 52
DO  - 10.2298/SOS2003257F
ER  - 

@article{
author = "Filipović, Suzana and Andjelković, Lj. and Jeremić, D. and Vulić, Predrag J. and Nikolić, A.S. and Marković, S. and Paunović, V and Lević, Steva and Pavlović, Vladimir",
year = "2020",
abstract = "Barium titanate (BaTiO3) attracts high scientific and technological attention due to good dielectric and electromechanical properties. Although BaTiO3 is one of the most frequently investigated ferroelectric materials, the need for finding new and/or improved synthesis methods of this material still exists. In this paper, a novel, mild synthesis route for producing tetragonal BaTiO3 from barium nitrate and Ti-oxalate precursor is presented. Morphology of the prepared and subsequently sintered BaTiO3 was determined by SEM. Particle size distribution of the as prepared powder was monitored by the laser diffraction. The phase composition, structure and lattice dynamics were investigated by XRD and Raman spectroscopy. Finally, dielectric parameters were determined in the temperature range from 30 to 180 degrees C, and within a variety of frequencies. Curie temperature was detected at 130 degrees C.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Structure and Properties of Nanocrystalline Tetragonal BaTiO3 Prepared by Combustion Solid State Synthesis",
pages = "268-257",
number = "3",
volume = "52",
doi = "10.2298/SOS2003257F"
}

Filipović, S., Andjelković, Lj., Jeremić, D., Vulić, P. J., Nikolić, A.S., Marković, S., Paunović, V., Lević, S.,& Pavlović, V.. (2020). Structure and Properties of Nanocrystalline Tetragonal BaTiO3 Prepared by Combustion Solid State Synthesis. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 52(3), 257-268.
https://doi.org/10.2298/SOS2003257F

Filipović S, Andjelković L, Jeremić D, Vulić PJ, Nikolić A, Marković S, Paunović V, Lević S, Pavlović V. Structure and Properties of Nanocrystalline Tetragonal BaTiO3 Prepared by Combustion Solid State Synthesis. in Science of Sintering. 2020;52(3):257-268.
doi:10.2298/SOS2003257F .

Filipović, Suzana, Andjelković, Lj., Jeremić, D., Vulić, Predrag J., Nikolić, A.S., Marković, S., Paunović, V, Lević, Steva, Pavlović, Vladimir, "Structure and Properties of Nanocrystalline Tetragonal BaTiO3 Prepared by Combustion Solid State Synthesis" in Science of Sintering, 52, no. 3 (2020):257-268,
https://doi.org/10.2298/SOS2003257F . .

TY  - JOUR
AU  - Obradović, Nina
AU  - Fahrenholtz, William G.
AU  - Filipović, Suzana
AU  - Marković, Smilja
AU  - Blagojević, Vladimir A.
AU  - Lević, Steva
AU  - Savić, Slobodan
AU  - Djordjević, Antonije
AU  - Pavlović, Vladimir
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5344
AB  - Solid-state mechanical activation of MgO and alpha-Al2O3 powders was used to produce MgAl2O4. The cation site occupancy in the resulting MgAl2O4 spinel was investigated using different methods. Differential thermal analysis and thermal gravimetry showed that mechanical activation reduced the spinel formation temperature by around 200 degrees C, and the corresponding activation energy by about 25%. In addition, characteristic temperatures for evaporation of physisorbed water and decomposition of Mg(OH)(2) shifted to lower values, and peaks were more pronounced. Raman spectra were used to characterize the degree of inversion as a function of the sintering temperature for all of the sintered specimens, indicating that the breaking point for ordering of the crystal structure was around 1500 degrees C for non-activated samples, and 1400 degrees C for activated samples.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics
EP  - 107
IS  - 1
SP  - 95
VL  - 140
DO  - 10.1007/s10973-019-08846-w
ER  - 

@article{
author = "Obradović, Nina and Fahrenholtz, William G. and Filipović, Suzana and Marković, Smilja and Blagojević, Vladimir A. and Lević, Steva and Savić, Slobodan and Djordjević, Antonije and Pavlović, Vladimir",
year = "2020",
abstract = "Solid-state mechanical activation of MgO and alpha-Al2O3 powders was used to produce MgAl2O4. The cation site occupancy in the resulting MgAl2O4 spinel was investigated using different methods. Differential thermal analysis and thermal gravimetry showed that mechanical activation reduced the spinel formation temperature by around 200 degrees C, and the corresponding activation energy by about 25%. In addition, characteristic temperatures for evaporation of physisorbed water and decomposition of Mg(OH)(2) shifted to lower values, and peaks were more pronounced. Raman spectra were used to characterize the degree of inversion as a function of the sintering temperature for all of the sintered specimens, indicating that the breaking point for ordering of the crystal structure was around 1500 degrees C for non-activated samples, and 1400 degrees C for activated samples.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics",
pages = "107-95",
number = "1",
volume = "140",
doi = "10.1007/s10973-019-08846-w"
}

Obradović, N., Fahrenholtz, W. G., Filipović, S., Marković, S., Blagojević, V. A., Lević, S., Savić, S., Djordjević, A.,& Pavlović, V.. (2020). Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 140(1), 95-107.
https://doi.org/10.1007/s10973-019-08846-w

Obradović N, Fahrenholtz WG, Filipović S, Marković S, Blagojević VA, Lević S, Savić S, Djordjević A, Pavlović V. Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics. in Journal of Thermal Analysis and Calorimetry. 2020;140(1):95-107.
doi:10.1007/s10973-019-08846-w .

Obradović, Nina, Fahrenholtz, William G., Filipović, Suzana, Marković, Smilja, Blagojević, Vladimir A., Lević, Steva, Savić, Slobodan, Djordjević, Antonije, Pavlović, Vladimir, "Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics" in Journal of Thermal Analysis and Calorimetry, 140, no. 1 (2020):95-107,
https://doi.org/10.1007/s10973-019-08846-w . .

TY  - JOUR
AU  - Obradović, Nina
AU  - Rusmirović, Jelena D.
AU  - Filipović, Suzana
AU  - Kosanović, Darko
AU  - Marinković, Aleksandar
AU  - Radić, Danka
AU  - Pavlović, Vladimir
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5248
AB  - Industrial/technological growth is directly connected with environmental pollution, but its influence can be minimized through pollution abatement approaches such as the treatment of industrial wastewater. In this study, novel porous amine-functionalized silicate minerals, specifically, cordierite was investigated for the removal of toxic heavy metals from industrial wastewaters. Cordierite supports were synthesized by mixing MgO, Al2O3, and SiO2 powders in 2:2:5 molar ratios, and mechanically activated via ball milling in ethanol for 10, 40, or 80 min. Pellets were sintered by heating in air at 20 degrees C min(-1) to 1,350 degrees C, for 2 h. Porous supports were produced by coarsely crushing the sintered pellets and mixing the crushed and sieved cordierite powder with 20 wt.% of a pore-forming agent, either nanocellulose or yeast. The resulting pellets were sintered by heating at 5 degrees C min(-1) to 700 degrees C in air. The synthetic cordierite support was modified by treatment in poly-ethylenimine. Activated supports were then tested for the removal of Ni2+ and Cd2+ ions. The phase composition of the cordierite supports was analyzed by the X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy. Analysis of adsorption isotherms, kinetics, and thermodynamic parameters indicated that adsorption was a spontaneous, endothermic process with a maximum adsorption capacity of 36 mg g(-1) for Cd2+ and 43 mg g(-1) for Ni2+. This work has shed light on the mechanism of heavy metal removal from the aquatic medium using the novel hybrid functionalized cordierite-based ceramic.
PB  - Desalination Publ, Hopkinton
T2  - Desalination and Water Treatment
T1  - Porous cordierite-supported polyethyleneimine composites for nickel(II) and cadmium(II) ions removal
EP  - 296
SP  - 283
VL  - 192
DO  - 10.5004/dwt.2020.25736
ER  - 

@article{
author = "Obradović, Nina and Rusmirović, Jelena D. and Filipović, Suzana and Kosanović, Darko and Marinković, Aleksandar and Radić, Danka and Pavlović, Vladimir",
year = "2020",
abstract = "Industrial/technological growth is directly connected with environmental pollution, but its influence can be minimized through pollution abatement approaches such as the treatment of industrial wastewater. In this study, novel porous amine-functionalized silicate minerals, specifically, cordierite was investigated for the removal of toxic heavy metals from industrial wastewaters. Cordierite supports were synthesized by mixing MgO, Al2O3, and SiO2 powders in 2:2:5 molar ratios, and mechanically activated via ball milling in ethanol for 10, 40, or 80 min. Pellets were sintered by heating in air at 20 degrees C min(-1) to 1,350 degrees C, for 2 h. Porous supports were produced by coarsely crushing the sintered pellets and mixing the crushed and sieved cordierite powder with 20 wt.% of a pore-forming agent, either nanocellulose or yeast. The resulting pellets were sintered by heating at 5 degrees C min(-1) to 700 degrees C in air. The synthetic cordierite support was modified by treatment in poly-ethylenimine. Activated supports were then tested for the removal of Ni2+ and Cd2+ ions. The phase composition of the cordierite supports was analyzed by the X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy. Analysis of adsorption isotherms, kinetics, and thermodynamic parameters indicated that adsorption was a spontaneous, endothermic process with a maximum adsorption capacity of 36 mg g(-1) for Cd2+ and 43 mg g(-1) for Ni2+. This work has shed light on the mechanism of heavy metal removal from the aquatic medium using the novel hybrid functionalized cordierite-based ceramic.",
publisher = "Desalination Publ, Hopkinton",
journal = "Desalination and Water Treatment",
title = "Porous cordierite-supported polyethyleneimine composites for nickel(II) and cadmium(II) ions removal",
pages = "296-283",
volume = "192",
doi = "10.5004/dwt.2020.25736"
}

Obradović, N., Rusmirović, J. D., Filipović, S., Kosanović, D., Marinković, A., Radić, D.,& Pavlović, V.. (2020). Porous cordierite-supported polyethyleneimine composites for nickel(II) and cadmium(II) ions removal. in Desalination and Water Treatment
Desalination Publ, Hopkinton., 192, 283-296.
https://doi.org/10.5004/dwt.2020.25736

Obradović N, Rusmirović JD, Filipović S, Kosanović D, Marinković A, Radić D, Pavlović V. Porous cordierite-supported polyethyleneimine composites for nickel(II) and cadmium(II) ions removal. in Desalination and Water Treatment. 2020;192:283-296.
doi:10.5004/dwt.2020.25736 .

Obradović, Nina, Rusmirović, Jelena D., Filipović, Suzana, Kosanović, Darko, Marinković, Aleksandar, Radić, Danka, Pavlović, Vladimir, "Porous cordierite-supported polyethyleneimine composites for nickel(II) and cadmium(II) ions removal" in Desalination and Water Treatment, 192 (2020):283-296,
https://doi.org/10.5004/dwt.2020.25736 . .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Pavlović, Vera P.
AU  - Mitrić, Miodrag
AU  - Lević, Steva
AU  - Mitrović, Nebojša
AU  - Maricić, Aleksa
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5111
AB  - Multiferroic materials attracted a lot of attention in recent years because of their significant
scientific interest and technological applications. The multiferroic core/shell powders have a better
connectivity between the phases, resulting in superior dielectric and magneto electric properties. In
this study, the influence of preparation condition on structure and properties of BaTiO3/α-Fe2O3
core/shell composite materials was examined. The five samples were obtained by varying synthesis
conditions, such as synthesized method (co-precipitation and sonochemical method) and pH values of
solution. XRD and Raman spectroscopy analyses were performed in order to determine phase
composition and structural changes within samples. Morphology modifications were examined by
SEM and EDS analyses. Finally, effect of structural and microstructural changes on magnetic and
electrical properties was detected and explained.
PB  - Springeropen, London
T2  - Journal of Advanced Ceramics
T1  - Synthesis and characterization of BaTiO3/α-Fe2O3 core/shell structure
EP  - 147
IS  - 1
SP  - 133
VL  - 8
DO  - 10.1007/s40145-018-0301-5
ER  - 

@article{
author = "Filipović, Suzana and Pavlović, Vera P. and Mitrić, Miodrag and Lević, Steva and Mitrović, Nebojša and Maricić, Aleksa and Vlahović, Branislav and Pavlović, Vladimir",
year = "2019",
abstract = "Multiferroic materials attracted a lot of attention in recent years because of their significant
scientific interest and technological applications. The multiferroic core/shell powders have a better
connectivity between the phases, resulting in superior dielectric and magneto electric properties. In
this study, the influence of preparation condition on structure and properties of BaTiO3/α-Fe2O3
core/shell composite materials was examined. The five samples were obtained by varying synthesis
conditions, such as synthesized method (co-precipitation and sonochemical method) and pH values of
solution. XRD and Raman spectroscopy analyses were performed in order to determine phase
composition and structural changes within samples. Morphology modifications were examined by
SEM and EDS analyses. Finally, effect of structural and microstructural changes on magnetic and
electrical properties was detected and explained.",
publisher = "Springeropen, London",
journal = "Journal of Advanced Ceramics",
title = "Synthesis and characterization of BaTiO3/α-Fe2O3 core/shell structure",
pages = "147-133",
number = "1",
volume = "8",
doi = "10.1007/s40145-018-0301-5"
}

Filipović, S., Pavlović, V. P., Mitrić, M., Lević, S., Mitrović, N., Maricić, A., Vlahović, B.,& Pavlović, V.. (2019). Synthesis and characterization of BaTiO3/α-Fe2O3 core/shell structure. in Journal of Advanced Ceramics
Springeropen, London., 8(1), 133-147.
https://doi.org/10.1007/s40145-018-0301-5

Filipović S, Pavlović VP, Mitrić M, Lević S, Mitrović N, Maricić A, Vlahović B, Pavlović V. Synthesis and characterization of BaTiO3/α-Fe2O3 core/shell structure. in Journal of Advanced Ceramics. 2019;8(1):133-147.
doi:10.1007/s40145-018-0301-5 .

Filipović, Suzana, Pavlović, Vera P., Mitrić, Miodrag, Lević, Steva, Mitrović, Nebojša, Maricić, Aleksa, Vlahović, Branislav, Pavlović, Vladimir, "Synthesis and characterization of BaTiO3/α-Fe2O3 core/shell structure" in Journal of Advanced Ceramics, 8, no. 1 (2019):133-147,
https://doi.org/10.1007/s40145-018-0301-5 . .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Balać, Igor
AU  - Đorđević, Antonije
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://www.sciencedirect.com/science/article/pii/S0921883119302596
UR  - http://dais.sanu.ac.rs/123456789/7027
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5755
AB  - Alumina-based compounds have many technological applications and attract great attention even after decades of investigation, due to their good chemical, electrical, and mechanical properties. A mixture of several alumina modifications (α-, κ-, γ-Al2O3) doped with 1 wt% of Mn2O3 was used for this experiment. The powder was mechanically activated for 60 min in an ethanol medium. After compaction, green bodies were sintered in the temperature range from 1200 to 1400 °C. Microstructures of the obtained specimens were investigated by scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The influence of morphological changes on electrical and mechanical properties was examined in detail. We have developed a test fixture and corresponding software for measurement of the relative dielectric permittivity and the loss tangent of ceramic specimens. This new method overcomes the problems of dimensions and shape of samples, as well as the problem of applying silver paste. The accuracy is around 2% for ε'r and 0.003 for tanδ. We demonstrate that the mechanical activation (MA) has the dominant influence on lowering the characteristic temperatures and microstructure development, which further leads to increased permittivity and tensile strength.
PB  - Elsevier
T2  - Advanced Powder Technology
T1  - The effect of ball milling on properties of sintered manganese-doped alumina
EP  - 2540
IS  - 11
SP  - 2533
VL  - 30
DO  - 10.1016/j.apt.2019.07.033
ER  - 

@article{
author = "Filipović, Suzana and Obradović, Nina and Marković, Smilja and Mitrić, Miodrag and Balać, Igor and Đorđević, Antonije and Pavlović, Vladimir",
year = "2019",
abstract = "Alumina-based compounds have many technological applications and attract great attention even after decades of investigation, due to their good chemical, electrical, and mechanical properties. A mixture of several alumina modifications (α-, κ-, γ-Al2O3) doped with 1 wt% of Mn2O3 was used for this experiment. The powder was mechanically activated for 60 min in an ethanol medium. After compaction, green bodies were sintered in the temperature range from 1200 to 1400 °C. Microstructures of the obtained specimens were investigated by scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The influence of morphological changes on electrical and mechanical properties was examined in detail. We have developed a test fixture and corresponding software for measurement of the relative dielectric permittivity and the loss tangent of ceramic specimens. This new method overcomes the problems of dimensions and shape of samples, as well as the problem of applying silver paste. The accuracy is around 2% for ε'r and 0.003 for tanδ. We demonstrate that the mechanical activation (MA) has the dominant influence on lowering the characteristic temperatures and microstructure development, which further leads to increased permittivity and tensile strength.",
publisher = "Elsevier",
journal = "Advanced Powder Technology",
title = "The effect of ball milling on properties of sintered manganese-doped alumina",
pages = "2540-2533",
number = "11",
volume = "30",
doi = "10.1016/j.apt.2019.07.033"
}

Filipović, S., Obradović, N., Marković, S., Mitrić, M., Balać, I., Đorđević, A.,& Pavlović, V.. (2019). The effect of ball milling on properties of sintered manganese-doped alumina. in Advanced Powder Technology
Elsevier., 30(11), 2533-2540.
https://doi.org/10.1016/j.apt.2019.07.033

Filipović S, Obradović N, Marković S, Mitrić M, Balać I, Đorđević A, Pavlović V. The effect of ball milling on properties of sintered manganese-doped alumina. in Advanced Powder Technology. 2019;30(11):2533-2540.
doi:10.1016/j.apt.2019.07.033 .

Filipović, Suzana, Obradović, Nina, Marković, Smilja, Mitrić, Miodrag, Balać, Igor, Đorđević, Antonije, Pavlović, Vladimir, "The effect of ball milling on properties of sintered manganese-doped alumina" in Advanced Powder Technology, 30, no. 11 (2019):2533-2540,
https://doi.org/10.1016/j.apt.2019.07.033 . .

TY  - JOUR
AU  - Obradović, Nina
AU  - Blagojević, Vladimir A.
AU  - Filipović, Suzana
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Kachlik, Martin
AU  - Maca, Karel
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5756
AB  - Thermally activated processes in cordierite-based ceramics were investigated to determine the effect of the mechanical activation and the addition of TeO2 on kinetic and thermodynamic parameters of these processes. Using a combination of dilatometry and DTA measurements in the 100–1400 °C temperature range, it was established that both the mechanical activation and the addition of TeO2 have a significant effect on processes in cordierite-based ceramics. A combination of 5 mass% addition of TeO2 and mechanical activation for 40 min reduced the sintering temperature of cordierite ceramics to around 1100 °C. In addition, the analysis of DTA measurements of mechanically activated samples indicates that the mechanical activation leads to intensification of the cordierite formation through an increase in concentration of surface defects and an increase in grain contact surface in the initial powder.
PB  - Springer
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Kinetics of thermally activated processes in cordierite-based ceramics
EP  - 2998
SP  - 2989
VL  - 138
DO  - 10.1007/s10973-018-7924-1
ER  - 

@article{
author = "Obradović, Nina and Blagojević, Vladimir A. and Filipović, Suzana and Đorđević, Nataša and Kosanović, Darko and Marković, Smilja and Kachlik, Martin and Maca, Karel and Pavlović, Vladimir",
year = "2019",
abstract = "Thermally activated processes in cordierite-based ceramics were investigated to determine the effect of the mechanical activation and the addition of TeO2 on kinetic and thermodynamic parameters of these processes. Using a combination of dilatometry and DTA measurements in the 100–1400 °C temperature range, it was established that both the mechanical activation and the addition of TeO2 have a significant effect on processes in cordierite-based ceramics. A combination of 5 mass% addition of TeO2 and mechanical activation for 40 min reduced the sintering temperature of cordierite ceramics to around 1100 °C. In addition, the analysis of DTA measurements of mechanically activated samples indicates that the mechanical activation leads to intensification of the cordierite formation through an increase in concentration of surface defects and an increase in grain contact surface in the initial powder.",
publisher = "Springer",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Kinetics of thermally activated processes in cordierite-based ceramics",
pages = "2998-2989",
volume = "138",
doi = "10.1007/s10973-018-7924-1"
}

Obradović, N., Blagojević, V. A., Filipović, S., Đorđević, N., Kosanović, D., Marković, S., Kachlik, M., Maca, K.,& Pavlović, V.. (2019). Kinetics of thermally activated processes in cordierite-based ceramics. in Journal of Thermal Analysis and Calorimetry
Springer., 138, 2989-2998.
https://doi.org/10.1007/s10973-018-7924-1

Obradović N, Blagojević VA, Filipović S, Đorđević N, Kosanović D, Marković S, Kachlik M, Maca K, Pavlović V. Kinetics of thermally activated processes in cordierite-based ceramics. in Journal of Thermal Analysis and Calorimetry. 2019;138:2989-2998.
doi:10.1007/s10973-018-7924-1 .

Obradović, Nina, Blagojević, Vladimir A., Filipović, Suzana, Đorđević, Nataša, Kosanović, Darko, Marković, Smilja, Kachlik, Martin, Maca, Karel, Pavlović, Vladimir, "Kinetics of thermally activated processes in cordierite-based ceramics" in Journal of Thermal Analysis and Calorimetry, 138 (2019):2989-2998,
https://doi.org/10.1007/s10973-018-7924-1 . .

TY  - CONF
AU  - Obradović, Nina
AU  - Fahrenholtz, William G.
AU  - Filipović, Suzana
AU  - Đorđević, Pavle
AU  - Rogan, Jelena
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://dais.sanu.ac.rs/123456789/7050
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5757
AB  - Magnesium aluminate and other alumina-based spinels attract attention due to their high hardness, high mechanical strength, and low dielectric constant. MgAl2O4 was produced by solid-state reaction between MgO and a-Al2O3 powders. Mechanical activation was used to increase the reactivity of powders and decrease the sintering temperatures. Mechanical activation of mixed powders was performed in a high-energy planetary ball mill in air for 30, 60, 90, and 120 minutes. The resulting powders were characterized to determine the effect of activation on surface area, particle size, and crystallinity. Mechanical activation decreased particle size, increased surface area, and increased the width of peaks in x-ray diffraction. Dilatometry was used to monitor densification behavior up to 1500 °C. For non-activated powders, sintering started at approximately 1400 °C, while for activated powders, the onset temperature decreased to about 1340 °C. Mechanical activation is an efficient method to improve the densification behaviour of MgAl2O4 produced from mixed oxide powders.
PB  - The Ceramic Society of Japan
C3  - The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13), October 27 - November 1, 2019, Okinawa Convention Center, Japan
T1  - Effect of Mechanical Activation on the Densification Behavior of MgAl2O4 Spinel
SP  - 30-B1C-S13-14
UR  - https://hdl.handle.net/21.15107/rcub_dais_7050
ER  - 

@conference{
author = "Obradović, Nina and Fahrenholtz, William G. and Filipović, Suzana and Đorđević, Pavle and Rogan, Jelena and Pavlović, Vladimir",
year = "2019",
abstract = "Magnesium aluminate and other alumina-based spinels attract attention due to their high hardness, high mechanical strength, and low dielectric constant. MgAl2O4 was produced by solid-state reaction between MgO and a-Al2O3 powders. Mechanical activation was used to increase the reactivity of powders and decrease the sintering temperatures. Mechanical activation of mixed powders was performed in a high-energy planetary ball mill in air for 30, 60, 90, and 120 minutes. The resulting powders were characterized to determine the effect of activation on surface area, particle size, and crystallinity. Mechanical activation decreased particle size, increased surface area, and increased the width of peaks in x-ray diffraction. Dilatometry was used to monitor densification behavior up to 1500 °C. For non-activated powders, sintering started at approximately 1400 °C, while for activated powders, the onset temperature decreased to about 1340 °C. Mechanical activation is an efficient method to improve the densification behaviour of MgAl2O4 produced from mixed oxide powders.",
publisher = "The Ceramic Society of Japan",
journal = "The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13), October 27 - November 1, 2019, Okinawa Convention Center, Japan",
title = "Effect of Mechanical Activation on the Densification Behavior of MgAl2O4 Spinel",
pages = "30-B1C-S13-14",
url = "https://hdl.handle.net/21.15107/rcub_dais_7050"
}

Obradović, N., Fahrenholtz, W. G., Filipović, S., Đorđević, P., Rogan, J.,& Pavlović, V.. (2019). Effect of Mechanical Activation on the Densification Behavior of MgAl2O4 Spinel. in The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13), October 27 - November 1, 2019, Okinawa Convention Center, Japan
The Ceramic Society of Japan., 30-B1C-S13-14.
https://hdl.handle.net/21.15107/rcub_dais_7050

Obradović N, Fahrenholtz WG, Filipović S, Đorđević P, Rogan J, Pavlović V. Effect of Mechanical Activation on the Densification Behavior of MgAl2O4 Spinel. in The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13), October 27 - November 1, 2019, Okinawa Convention Center, Japan. 2019;:30-B1C-S13-14.
https://hdl.handle.net/21.15107/rcub_dais_7050 .

Obradović, Nina, Fahrenholtz, William G., Filipović, Suzana, Đorđević, Pavle, Rogan, Jelena, Pavlović, Vladimir, "Effect of Mechanical Activation on the Densification Behavior of MgAl2O4 Spinel" in The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13), October 27 - November 1, 2019, Okinawa Convention Center, Japan (2019):30-B1C-S13-14,
https://hdl.handle.net/21.15107/rcub_dais_7050 .

TY  - JOUR
AU  - Obradović, Nina
AU  - Fahrenholtz, William G.
AU  - Filipović, Suzana
AU  - Kosanović, Darko
AU  - Dapčević, A.
AU  - Đorđević, Antonije
AU  - Balać, Igor
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://www.sciencedirect.com/science/article/pii/S0272884219306340
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5761
AB  - Magnesium aluminate, MgAl2O4 and other alumina-based spinels are ceramics with high hardness, high melting point and mechanical strenght. Spinels can also be used as dielectrics in microwave applications. The goal of this study was to examine the effects of mechanical activation and sintering temperatures on physico-chemical properties of spinel. MgAl2O4 was produced by solid state reaction between MgO and α-Al2O3. The starting powders were mixed by ball milling to homogenize without significant particle size reduction. Mechanical activation of mixed powders was performed in a high-energy planetary ball mill in air for 1 h. Powders were compacted at 300 MPa. Heat treatments were performed in air, at temperatures ranging from 1200 to 1600 °C with 2 h dwell time, to determine the amount of spinel formation as a function of temperature. Phase composition and microstructure of initial powders and heated samples were determined by means of X-ray diffraction, particle size analysis, and scanning electron microscopy. The influences of milling and consolidation parameters were studied by electrical measurements and mechanical characterization. The main conclusion of this study was that mechanical activation for 60 min initiated a mechano-chemical reaction, resulted in spinel formation at much lower temperatures than within non-activated powders, and indicated that final sintering stage started at much lower temperatures for activated powders. Changes in microstructure parameters, as a consequence of mechanical treatment and subsequent heating of investigated powder mixtures, strongly affect electrical and mechanical properties of the final ceramics.
PB  - Elsevier
T2  - Ceramics International
T1  - The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics
EP  - 12021
IS  - 9
SP  - 12015
VL  - 45
DO  - 10.1016/j.ceramint.2019.03.095
ER  - 

@article{
author = "Obradović, Nina and Fahrenholtz, William G. and Filipović, Suzana and Kosanović, Darko and Dapčević, A. and Đorđević, Antonije and Balać, Igor and Pavlović, Vladimir",
year = "2019",
abstract = "Magnesium aluminate, MgAl2O4 and other alumina-based spinels are ceramics with high hardness, high melting point and mechanical strenght. Spinels can also be used as dielectrics in microwave applications. The goal of this study was to examine the effects of mechanical activation and sintering temperatures on physico-chemical properties of spinel. MgAl2O4 was produced by solid state reaction between MgO and α-Al2O3. The starting powders were mixed by ball milling to homogenize without significant particle size reduction. Mechanical activation of mixed powders was performed in a high-energy planetary ball mill in air for 1 h. Powders were compacted at 300 MPa. Heat treatments were performed in air, at temperatures ranging from 1200 to 1600 °C with 2 h dwell time, to determine the amount of spinel formation as a function of temperature. Phase composition and microstructure of initial powders and heated samples were determined by means of X-ray diffraction, particle size analysis, and scanning electron microscopy. The influences of milling and consolidation parameters were studied by electrical measurements and mechanical characterization. The main conclusion of this study was that mechanical activation for 60 min initiated a mechano-chemical reaction, resulted in spinel formation at much lower temperatures than within non-activated powders, and indicated that final sintering stage started at much lower temperatures for activated powders. Changes in microstructure parameters, as a consequence of mechanical treatment and subsequent heating of investigated powder mixtures, strongly affect electrical and mechanical properties of the final ceramics.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics",
pages = "12021-12015",
number = "9",
volume = "45",
doi = "10.1016/j.ceramint.2019.03.095"
}

Obradović, N., Fahrenholtz, W. G., Filipović, S., Kosanović, D., Dapčević, A., Đorđević, A., Balać, I.,& Pavlović, V.. (2019). The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics. in Ceramics International
Elsevier., 45(9), 12015-12021.
https://doi.org/10.1016/j.ceramint.2019.03.095

Obradović N, Fahrenholtz WG, Filipović S, Kosanović D, Dapčević A, Đorđević A, Balać I, Pavlović V. The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics. in Ceramics International. 2019;45(9):12015-12021.
doi:10.1016/j.ceramint.2019.03.095 .

Obradović, Nina, Fahrenholtz, William G., Filipović, Suzana, Kosanović, Darko, Dapčević, A., Đorđević, Antonije, Balać, Igor, Pavlović, Vladimir, "The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics" in Ceramics International, 45, no. 9 (2019):12015-12021,
https://doi.org/10.1016/j.ceramint.2019.03.095 . .

TY  - CONF
AU  - Obradović, Nina
AU  - Fahrenholtz, William G.
AU  - Filipović, Suzana
AU  - Marković, Smilja
AU  - Blagojević, Vladimir A.
AU  - Lević, Steva
AU  - Đorđević, Antonije
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://dais.sanu.ac.rs/123456789/7020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5752
AB  - Magnesium aluminate and other alumina-based spinels are refractory ceramics with excellent properties, such as high hardness, high mechanical strength, and low dielectric constant, applicable in many modern industries. MgAl2O4 was produced by solid state reaction between MgO and alpha-Al2O3 powders. Mechanical activation represents a very efficient method for increasing the reactivity of powders, accelerating chemical reactions and decreasing the sintering temperatures. Mechanical activation of mixed powders was performed in a high-energy planetary ball mill in air for 60 minutes. Sintering was performed in air at temperatures ranging from 1200°C to 1600 °C with a 2 h dwell time. Initial powders and sintered samples were characterized using X-ray diffraction and scanning electron microscopy. Differential thermal analysis (DTA) and thermal gravimetry (TG) were used to determine the temperatures for synthesis reactions and phase transformations. Based on the DTA results, several different processes occured during heating, including evaporation of physisorbed water, decomposition of Mg(OH)2, and spinel formation. With mechanical activation, all characteristic temperatures shifted to lower values, and peaks were more pronounced. Raman spectra were used to characterize the degree of inversion as a function of sintering temperature for all of the sintered specimens.
PB  - Central and Eastern European Committee for Thermal Analysis and Calorimetry
C3  - Book of abstracts of the 5th Central and Eastern European Conference on Thermal Analysis and Calorimetry (CEEC-TAC5) and 14th Mediterranean Conference on Calorimetry and Thermal Analysis (Medicta2019)
T1  - Influence of mechanical activation on kinetics and formation of spinel monitored by DTA
EP  - 70
SP  - 70
UR  - https://hdl.handle.net/21.15107/rcub_dais_7020
ER  - 

@conference{
author = "Obradović, Nina and Fahrenholtz, William G. and Filipović, Suzana and Marković, Smilja and Blagojević, Vladimir A. and Lević, Steva and Đorđević, Antonije and Pavlović, Vladimir",
year = "2019",
abstract = "Magnesium aluminate and other alumina-based spinels are refractory ceramics with excellent properties, such as high hardness, high mechanical strength, and low dielectric constant, applicable in many modern industries. MgAl2O4 was produced by solid state reaction between MgO and alpha-Al2O3 powders. Mechanical activation represents a very efficient method for increasing the reactivity of powders, accelerating chemical reactions and decreasing the sintering temperatures. Mechanical activation of mixed powders was performed in a high-energy planetary ball mill in air for 60 minutes. Sintering was performed in air at temperatures ranging from 1200°C to 1600 °C with a 2 h dwell time. Initial powders and sintered samples were characterized using X-ray diffraction and scanning electron microscopy. Differential thermal analysis (DTA) and thermal gravimetry (TG) were used to determine the temperatures for synthesis reactions and phase transformations. Based on the DTA results, several different processes occured during heating, including evaporation of physisorbed water, decomposition of Mg(OH)2, and spinel formation. With mechanical activation, all characteristic temperatures shifted to lower values, and peaks were more pronounced. Raman spectra were used to characterize the degree of inversion as a function of sintering temperature for all of the sintered specimens.",
publisher = "Central and Eastern European Committee for Thermal Analysis and Calorimetry",
journal = "Book of abstracts of the 5th Central and Eastern European Conference on Thermal Analysis and Calorimetry (CEEC-TAC5) and 14th Mediterranean Conference on Calorimetry and Thermal Analysis (Medicta2019)",
title = "Influence of mechanical activation on kinetics and formation of spinel monitored by DTA",
pages = "70-70",
url = "https://hdl.handle.net/21.15107/rcub_dais_7020"
}

Obradović, N., Fahrenholtz, W. G., Filipović, S., Marković, S., Blagojević, V. A., Lević, S., Đorđević, A.,& Pavlović, V.. (2019). Influence of mechanical activation on kinetics and formation of spinel monitored by DTA. in Book of abstracts of the 5th Central and Eastern European Conference on Thermal Analysis and Calorimetry (CEEC-TAC5) and 14th Mediterranean Conference on Calorimetry and Thermal Analysis (Medicta2019)
Central and Eastern European Committee for Thermal Analysis and Calorimetry., 70-70.
https://hdl.handle.net/21.15107/rcub_dais_7020

Obradović N, Fahrenholtz WG, Filipović S, Marković S, Blagojević VA, Lević S, Đorđević A, Pavlović V. Influence of mechanical activation on kinetics and formation of spinel monitored by DTA. in Book of abstracts of the 5th Central and Eastern European Conference on Thermal Analysis and Calorimetry (CEEC-TAC5) and 14th Mediterranean Conference on Calorimetry and Thermal Analysis (Medicta2019). 2019;:70-70.
https://hdl.handle.net/21.15107/rcub_dais_7020 .

Obradović, Nina, Fahrenholtz, William G., Filipović, Suzana, Marković, Smilja, Blagojević, Vladimir A., Lević, Steva, Đorđević, Antonije, Pavlović, Vladimir, "Influence of mechanical activation on kinetics and formation of spinel monitored by DTA" in Book of abstracts of the 5th Central and Eastern European Conference on Thermal Analysis and Calorimetry (CEEC-TAC5) and 14th Mediterranean Conference on Calorimetry and Thermal Analysis (Medicta2019) (2019):70-70,
https://hdl.handle.net/21.15107/rcub_dais_7020 .

TY  - CONF
AU  - Obradović, Nina
AU  - Fahrenholtz, William G.
AU  - Filipović, Suzana
AU  - Kosanović, Darko
AU  - Dapčević, Aleksandra
AU  - Rogan, Jelena
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://dais.sanu.ac.rs/123456789/7022
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5753
AB  - Magnesium aluminate, MgAl2O4, and other alumina-based spinels are refractory ceramics with high hardness and resistance to chemical attack while also being possible microwave dielectrics. Pure MgAl2O4 can be optically transparent when fully dense. Spinels exhibit inversion, which results in disorder among occupancy of A and B site cations. The goal of this study was to examine the effects of mechanical activation and composition on the temperature required for spinel formation and the site occupancy in the resulting spinel. 
MgAl2O4 was produced by solid state reaction between MgO and alpha-Al2O3. The starting powders were mixed by ball milling to homogenize the powders without significant particle size reduction. Mechanical activation of mixed powders was performed in a high-energy planetary ball mill in air for 1 h. Powders were compacted at 300 MPa. Heat treatments were performed in air, at temperatures ranging from 1200 to 1500 °C with 2 h dwell time, to determine the amount of spinel formation as a function of temperature. Phase composition and microstructure of initial powders and heated samples were determined by means of X-ray diffraction, particle size analysis, and scanning electron microscopy. The influence of milling and consolidation parameters were studied by electrical measurements and mechanical characterization. 
The main results of this study were that mechanical activation for 60 minutes initiated a mechano-chemical reaction, and resulted in spinel formation at much lower temperatures than within non-activated powders. Microstructures of ceramics sintered below 1400 oC indicated that final stage sintering started at much lower temperatures for activated samples than for non-activated samples. 
Changes in microstructure parameters, as a consequence of mechanical treatment and subsequent heating of investigated powder mixtures, strongly affect electrical and mechanical properties of the final ceramics.
PB  - Societa ceramica italiana
PB  - Politecnico di Torino
C3  - Abstract Book / XVI Conference and Exhibition of the European Ceramic Society XVI ECerS Conference, Torino, 16-20 June 2019
T1  - The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics
EP  - 262
SP  - 262
UR  - https://hdl.handle.net/21.15107/rcub_dais_7022
ER  - 

@conference{
author = "Obradović, Nina and Fahrenholtz, William G. and Filipović, Suzana and Kosanović, Darko and Dapčević, Aleksandra and Rogan, Jelena and Pavlović, Vladimir",
year = "2019",
abstract = "Magnesium aluminate, MgAl2O4, and other alumina-based spinels are refractory ceramics with high hardness and resistance to chemical attack while also being possible microwave dielectrics. Pure MgAl2O4 can be optically transparent when fully dense. Spinels exhibit inversion, which results in disorder among occupancy of A and B site cations. The goal of this study was to examine the effects of mechanical activation and composition on the temperature required for spinel formation and the site occupancy in the resulting spinel. 
MgAl2O4 was produced by solid state reaction between MgO and alpha-Al2O3. The starting powders were mixed by ball milling to homogenize the powders without significant particle size reduction. Mechanical activation of mixed powders was performed in a high-energy planetary ball mill in air for 1 h. Powders were compacted at 300 MPa. Heat treatments were performed in air, at temperatures ranging from 1200 to 1500 °C with 2 h dwell time, to determine the amount of spinel formation as a function of temperature. Phase composition and microstructure of initial powders and heated samples were determined by means of X-ray diffraction, particle size analysis, and scanning electron microscopy. The influence of milling and consolidation parameters were studied by electrical measurements and mechanical characterization. 
The main results of this study were that mechanical activation for 60 minutes initiated a mechano-chemical reaction, and resulted in spinel formation at much lower temperatures than within non-activated powders. Microstructures of ceramics sintered below 1400 oC indicated that final stage sintering started at much lower temperatures for activated samples than for non-activated samples. 
Changes in microstructure parameters, as a consequence of mechanical treatment and subsequent heating of investigated powder mixtures, strongly affect electrical and mechanical properties of the final ceramics.",
publisher = "Societa ceramica italiana, Politecnico di Torino",
journal = "Abstract Book / XVI Conference and Exhibition of the European Ceramic Society XVI ECerS Conference, Torino, 16-20 June 2019",
title = "The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics",
pages = "262-262",
url = "https://hdl.handle.net/21.15107/rcub_dais_7022"
}

Obradović, N., Fahrenholtz, W. G., Filipović, S., Kosanović, D., Dapčević, A., Rogan, J.,& Pavlović, V.. (2019). The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics. in Abstract Book / XVI Conference and Exhibition of the European Ceramic Society XVI ECerS Conference, Torino, 16-20 June 2019
Societa ceramica italiana., 262-262.
https://hdl.handle.net/21.15107/rcub_dais_7022

Obradović N, Fahrenholtz WG, Filipović S, Kosanović D, Dapčević A, Rogan J, Pavlović V. The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics. in Abstract Book / XVI Conference and Exhibition of the European Ceramic Society XVI ECerS Conference, Torino, 16-20 June 2019. 2019;:262-262.
https://hdl.handle.net/21.15107/rcub_dais_7022 .

Obradović, Nina, Fahrenholtz, William G., Filipović, Suzana, Kosanović, Darko, Dapčević, Aleksandra, Rogan, Jelena, Pavlović, Vladimir, "The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics" in Abstract Book / XVI Conference and Exhibition of the European Ceramic Society XVI ECerS Conference, Torino, 16-20 June 2019 (2019):262-262,
https://hdl.handle.net/21.15107/rcub_dais_7022 .

TY  - CONF
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Marković, Smilja
AU  - Balać, Igor
AU  - Đorđević, Antonije
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://dais.sanu.ac.rs/123456789/7025
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5754
AB  - Corundum (alpha-alumina) is one of the most exploited materials in ceramic industry due to its good physico-chemical properties, mechanical properties, and, importantly, due to its low cost. Advantageous properties, such as hardness, dielectric and thermal properties, and refractoriness, open the door to a wide range of applications of corundum. Porous alumina ceramics is often used for filters and as a catalytic substrate, whereas dense alumina ceramics is frequently used in automotive and aerospace industry. Hence, there is a great interest in exploring this type of ceramics. The aim of this work is to explain the influence of preparation parameters (mechanical activation, addition of transition metal oxides, and sintering conditions) on the final electrical and mechanical properties of alumina. 
As a starting powder, a mix of a few alumina modifications (α-, κ-,γ - Al2O3) was used. It was doped with 1 wt % of Mn2O3, Cr2O3, and NiO, respectively. Three of the obtained mixtures were homogenized and three were ball milled for 60 min. Particle size analysis, SEM, and EDS were performed in order to demonstrate changes in the microstructure after milling. DTA/TG analyses were used to determine all characteristic temperatures. After sintering at 1400 oC in an air atmosphere, mechanical, electrical, and physico-chemical properties of the obtained ceramics were determined. 
Results showed that the mechanical treatment lead to a decrease in temperatures of phase transitions and sintering for approximately 100 oC. Incorporation of cations of transition metals into the crystal lattice of alumina was noticed. Activated and sintered samples showed a higher tensile strength and higher relative dielectric permittivity then the sample doped with Cr2O3. 
The main conclusion of this investigation is that the mechanical activation has the dominant influence on lowering the characteristic temperatures of all detected phase transitions and sintering processes. Using a mixture of several crystalline phases of alumina as a starting powder alleviates the incorporation of transition-metal cations into the alumina crystal lattice, leading to changes in microstructures of the prepared ceramics. Finally, changes in the microstructure and lattice disordering have the dominant influence on the final mechanical properties.
PB  - Societa ceramica italiana
PB  - Politecnico di Torino
C3  - Abstract Book / XVI Conference and Exhibition of the European Ceramic Society XVI ECerS Conference, Torino, 16-20 June 2019
T1  - Electrical and mechanical properties of alumina doped with transition metal oxides sintered at 1400°C
EP  - 682
SP  - 682
UR  - https://hdl.handle.net/21.15107/rcub_dais_7025
ER  - 

@conference{
author = "Filipović, Suzana and Obradović, Nina and Marković, Smilja and Balać, Igor and Đorđević, Antonije and Pavlović, Vladimir",
year = "2019",
abstract = "Corundum (alpha-alumina) is one of the most exploited materials in ceramic industry due to its good physico-chemical properties, mechanical properties, and, importantly, due to its low cost. Advantageous properties, such as hardness, dielectric and thermal properties, and refractoriness, open the door to a wide range of applications of corundum. Porous alumina ceramics is often used for filters and as a catalytic substrate, whereas dense alumina ceramics is frequently used in automotive and aerospace industry. Hence, there is a great interest in exploring this type of ceramics. The aim of this work is to explain the influence of preparation parameters (mechanical activation, addition of transition metal oxides, and sintering conditions) on the final electrical and mechanical properties of alumina. 
As a starting powder, a mix of a few alumina modifications (α-, κ-,γ - Al2O3) was used. It was doped with 1 wt % of Mn2O3, Cr2O3, and NiO, respectively. Three of the obtained mixtures were homogenized and three were ball milled for 60 min. Particle size analysis, SEM, and EDS were performed in order to demonstrate changes in the microstructure after milling. DTA/TG analyses were used to determine all characteristic temperatures. After sintering at 1400 oC in an air atmosphere, mechanical, electrical, and physico-chemical properties of the obtained ceramics were determined. 
Results showed that the mechanical treatment lead to a decrease in temperatures of phase transitions and sintering for approximately 100 oC. Incorporation of cations of transition metals into the crystal lattice of alumina was noticed. Activated and sintered samples showed a higher tensile strength and higher relative dielectric permittivity then the sample doped with Cr2O3. 
The main conclusion of this investigation is that the mechanical activation has the dominant influence on lowering the characteristic temperatures of all detected phase transitions and sintering processes. Using a mixture of several crystalline phases of alumina as a starting powder alleviates the incorporation of transition-metal cations into the alumina crystal lattice, leading to changes in microstructures of the prepared ceramics. Finally, changes in the microstructure and lattice disordering have the dominant influence on the final mechanical properties.",
publisher = "Societa ceramica italiana, Politecnico di Torino",
journal = "Abstract Book / XVI Conference and Exhibition of the European Ceramic Society XVI ECerS Conference, Torino, 16-20 June 2019",
title = "Electrical and mechanical properties of alumina doped with transition metal oxides sintered at 1400°C",
pages = "682-682",
url = "https://hdl.handle.net/21.15107/rcub_dais_7025"
}

Filipović, S., Obradović, N., Marković, S., Balać, I., Đorđević, A.,& Pavlović, V.. (2019). Electrical and mechanical properties of alumina doped with transition metal oxides sintered at 1400°C. in Abstract Book / XVI Conference and Exhibition of the European Ceramic Society XVI ECerS Conference, Torino, 16-20 June 2019
Societa ceramica italiana., 682-682.
https://hdl.handle.net/21.15107/rcub_dais_7025

Filipović S, Obradović N, Marković S, Balać I, Đorđević A, Pavlović V. Electrical and mechanical properties of alumina doped with transition metal oxides sintered at 1400°C. in Abstract Book / XVI Conference and Exhibition of the European Ceramic Society XVI ECerS Conference, Torino, 16-20 June 2019. 2019;:682-682.
https://hdl.handle.net/21.15107/rcub_dais_7025 .

Filipović, Suzana, Obradović, Nina, Marković, Smilja, Balać, Igor, Đorđević, Antonije, Pavlović, Vladimir, "Electrical and mechanical properties of alumina doped with transition metal oxides sintered at 1400°C" in Abstract Book / XVI Conference and Exhibition of the European Ceramic Society XVI ECerS Conference, Torino, 16-20 June 2019 (2019):682-682,
https://hdl.handle.net/21.15107/rcub_dais_7025 .

TY  - CONF
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Fahrenholtz, William G.
AU  - Marinković, Bojan A.
AU  - Rogan, Jelena
AU  - Lević, S.
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://dais.sanu.ac.rs/123456789/6779
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5743
AB  - Magnesium aluminate has spinel structure and very good mechanical, chemical, and thermal properties. Owing to these properties, it has a wide range of applications including refractory ceramics, optically transparent ceramic windows and armors. Its low dielectric permeability and low loss tangent enable its using for integrated electronic devices, as well. Furthermore, as a porous ceramic, magnesium aluminate has important application as humidity sensor, catalyst and filter for waste water purification. In this paper, synthesis and characterization of MgAl2O4 was performed. Stochiometric ratio of MgO and Al2O3powders was mixed and calcined within the temperatures range 1500-1800 oC to produce pure spinel phase. Thereafter pellets were crushed and treated in planetary ball mill for 60 minutes to obtained fine grain. All powders, calcined and milled, were examined for phase composition, crystal structure, and morphology. The obtained results showed that by increasing the temperature denser samples but more fragile have been synthesized. Milling for 1 hour leads to crumble of bigger particles and getting finer, single phase powders. XRPD and Raman spectroscopy showed disorder in crystal structure after milling.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019
T1  - Morphological and structural characterization of spinel MgAl2O4
EP  - 32
SP  - 32
UR  - https://hdl.handle.net/21.15107/rcub_dais_6779
ER  - 

@conference{
author = "Filipović, Suzana and Obradović, Nina and Fahrenholtz, William G. and Marinković, Bojan A. and Rogan, Jelena and Lević, S. and Pavlović, Vladimir",
year = "2019",
abstract = "Magnesium aluminate has spinel structure and very good mechanical, chemical, and thermal properties. Owing to these properties, it has a wide range of applications including refractory ceramics, optically transparent ceramic windows and armors. Its low dielectric permeability and low loss tangent enable its using for integrated electronic devices, as well. Furthermore, as a porous ceramic, magnesium aluminate has important application as humidity sensor, catalyst and filter for waste water purification. In this paper, synthesis and characterization of MgAl2O4 was performed. Stochiometric ratio of MgO and Al2O3powders was mixed and calcined within the temperatures range 1500-1800 oC to produce pure spinel phase. Thereafter pellets were crushed and treated in planetary ball mill for 60 minutes to obtained fine grain. All powders, calcined and milled, were examined for phase composition, crystal structure, and morphology. The obtained results showed that by increasing the temperature denser samples but more fragile have been synthesized. Milling for 1 hour leads to crumble of bigger particles and getting finer, single phase powders. XRPD and Raman spectroscopy showed disorder in crystal structure after milling.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019",
title = "Morphological and structural characterization of spinel MgAl2O4",
pages = "32-32",
url = "https://hdl.handle.net/21.15107/rcub_dais_6779"
}

Filipović, S., Obradović, N., Fahrenholtz, W. G., Marinković, B. A., Rogan, J., Lević, S.,& Pavlović, V.. (2019). Morphological and structural characterization of spinel MgAl2O4. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019
Belgrade : Serbian Ceramic Society., 32-32.
https://hdl.handle.net/21.15107/rcub_dais_6779

Filipović S, Obradović N, Fahrenholtz WG, Marinković BA, Rogan J, Lević S, Pavlović V. Morphological and structural characterization of spinel MgAl2O4. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019. 2019;:32-32.
https://hdl.handle.net/21.15107/rcub_dais_6779 .

Filipović, Suzana, Obradović, Nina, Fahrenholtz, William G., Marinković, Bojan A., Rogan, Jelena, Lević, S., Pavlović, Vladimir, "Morphological and structural characterization of spinel MgAl2O4" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019 (2019):32-32,
https://hdl.handle.net/21.15107/rcub_dais_6779 .

TY  - JOUR
AU  - Obradović, Nina
AU  - Fahrenholtz, William G.
AU  - Filipović, Suzana
AU  - Kosanović, Darko
AU  - Dapčević, A.
AU  - Đorđević, Antonije
AU  - Balać, Igor
AU  - Pavlović, Vladimir B.
PY  - 2019
UR  - http://www.sciencedirect.com/science/article/pii/S0272884219306340
UR  - http://dais.sanu.ac.rs/123456789/5272
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5740
AB  - Magnesium aluminate, MgAl2O4 and other alumina-based spinels are ceramics with high hardness, high melting point and mechanical strenght. Spinels can also be used as dielectrics in microwave applications. The goal of this study was to examine the effects of mechanical activation and sintering temperatures on physico-chemical properties of spinel. MgAl2O4 was produced by solid state reaction between MgO and α-Al2O3. The starting powders were mixed by ball milling to homogenize without significant particle size reduction. Mechanical activation of mixed powders was performed in a high-energy planetary ball mill in air for 1 h. Powders were compacted at 300 MPa. Heat treatments were performed in air, at temperatures ranging from 1200 to 1600 °C with 2 h dwell time, to determine the amount of spinel formation as a function of temperature. Phase composition and microstructure of initial powders and heated samples were determined by means of X-ray diffraction, particle size analysis, and scanning electron microscopy. The influences of milling and consolidation parameters were studied by electrical measurements and mechanical characterization. The main conclusion of this study was that mechanical activation for 60 min initiated a mechano-chemical reaction, resulted in spinel formation at much lower temperatures than within non-activated powders, and indicated that final sintering stage started at much lower temperatures for activated powders. Changes in microstructure parameters, as a consequence of mechanical treatment and subsequent heating of investigated powder mixtures, strongly affect electrical and mechanical properties of the final ceramics.
PB  - Elsevier
T2  - Ceramics International
T1  - The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics
EP  - 12021
IS  - 9
SP  - 12015
VL  - 45
DO  - 10.1016/j.ceramint.2019.03.095
ER  - 

@article{
author = "Obradović, Nina and Fahrenholtz, William G. and Filipović, Suzana and Kosanović, Darko and Dapčević, A. and Đorđević, Antonije and Balać, Igor and Pavlović, Vladimir B.",
year = "2019",
abstract = "Magnesium aluminate, MgAl2O4 and other alumina-based spinels are ceramics with high hardness, high melting point and mechanical strenght. Spinels can also be used as dielectrics in microwave applications. The goal of this study was to examine the effects of mechanical activation and sintering temperatures on physico-chemical properties of spinel. MgAl2O4 was produced by solid state reaction between MgO and α-Al2O3. The starting powders were mixed by ball milling to homogenize without significant particle size reduction. Mechanical activation of mixed powders was performed in a high-energy planetary ball mill in air for 1 h. Powders were compacted at 300 MPa. Heat treatments were performed in air, at temperatures ranging from 1200 to 1600 °C with 2 h dwell time, to determine the amount of spinel formation as a function of temperature. Phase composition and microstructure of initial powders and heated samples were determined by means of X-ray diffraction, particle size analysis, and scanning electron microscopy. The influences of milling and consolidation parameters were studied by electrical measurements and mechanical characterization. The main conclusion of this study was that mechanical activation for 60 min initiated a mechano-chemical reaction, resulted in spinel formation at much lower temperatures than within non-activated powders, and indicated that final sintering stage started at much lower temperatures for activated powders. Changes in microstructure parameters, as a consequence of mechanical treatment and subsequent heating of investigated powder mixtures, strongly affect electrical and mechanical properties of the final ceramics.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics",
pages = "12021-12015",
number = "9",
volume = "45",
doi = "10.1016/j.ceramint.2019.03.095"
}

Obradović, N., Fahrenholtz, W. G., Filipović, S., Kosanović, D., Dapčević, A., Đorđević, A., Balać, I.,& Pavlović, V. B.. (2019). The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics. in Ceramics International
Elsevier., 45(9), 12015-12021.
https://doi.org/10.1016/j.ceramint.2019.03.095

Obradović N, Fahrenholtz WG, Filipović S, Kosanović D, Dapčević A, Đorđević A, Balać I, Pavlović VB. The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics. in Ceramics International. 2019;45(9):12015-12021.
doi:10.1016/j.ceramint.2019.03.095 .

Obradović, Nina, Fahrenholtz, William G., Filipović, Suzana, Kosanović, Darko, Dapčević, A., Đorđević, Antonije, Balać, Igor, Pavlović, Vladimir B., "The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics" in Ceramics International, 45, no. 9 (2019):12015-12021,
https://doi.org/10.1016/j.ceramint.2019.03.095 . .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Balać, Igor
AU  - Đorđević, Antonije
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://www.sciencedirect.com/science/article/pii/S0921883119302596
UR  - http://dais.sanu.ac.rs/123456789/6951
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5745
AB  - Alumina-based compounds have many technological applications and attract great attention even after decades of investigation, due to their good chemical, electrical, and mechanical properties. A mixture of several alumina modifications (α-, κ-, γ-Al2O3) doped with 1 wt% of Mn2O3 was used for this experiment. The powder was mechanically activated for 60 min in an ethanol medium. After compaction, green bodies were sintered in the temperature range from 1200 to 1400 °C. Microstructures of the obtained specimens were investigated by scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The influence of morphological changes on electrical and mechanical properties was examined in detail. We have developed a test fixture and corresponding software for measurement of the relative dielectric permittivity and the loss tangent of ceramic specimens. This new method overcomes the problems of dimensions and shape of samples, as well as the problem of applying silver paste. The accuracy is around 2% for ε'r and 0.003 for tanδ. We demonstrate that the mechanical activation (MA) has the dominant influence on lowering the characteristic temperatures and microstructure development, which further leads to increased permittivity and tensile strength.
PB  - Elsevier
T2  - Advanced Powder Technology
T1  - The effect of ball milling on properties of sintered manganese-doped alumina
EP  - 2540
IS  - 11
SP  - 2533
VL  - 30
DO  - 10.1016/j.apt.2019.07.033
ER  - 

@article{
author = "Filipović, Suzana and Obradović, Nina and Marković, Smilja and Mitrić, Miodrag and Balać, Igor and Đorđević, Antonije and Pavlović, Vladimir",
year = "2019",
abstract = "Alumina-based compounds have many technological applications and attract great attention even after decades of investigation, due to their good chemical, electrical, and mechanical properties. A mixture of several alumina modifications (α-, κ-, γ-Al2O3) doped with 1 wt% of Mn2O3 was used for this experiment. The powder was mechanically activated for 60 min in an ethanol medium. After compaction, green bodies were sintered in the temperature range from 1200 to 1400 °C. Microstructures of the obtained specimens were investigated by scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The influence of morphological changes on electrical and mechanical properties was examined in detail. We have developed a test fixture and corresponding software for measurement of the relative dielectric permittivity and the loss tangent of ceramic specimens. This new method overcomes the problems of dimensions and shape of samples, as well as the problem of applying silver paste. The accuracy is around 2% for ε'r and 0.003 for tanδ. We demonstrate that the mechanical activation (MA) has the dominant influence on lowering the characteristic temperatures and microstructure development, which further leads to increased permittivity and tensile strength.",
publisher = "Elsevier",
journal = "Advanced Powder Technology",
title = "The effect of ball milling on properties of sintered manganese-doped alumina",
pages = "2540-2533",
number = "11",
volume = "30",
doi = "10.1016/j.apt.2019.07.033"
}

Filipović, S., Obradović, N., Marković, S., Mitrić, M., Balać, I., Đorđević, A.,& Pavlović, V.. (2019). The effect of ball milling on properties of sintered manganese-doped alumina. in Advanced Powder Technology
Elsevier., 30(11), 2533-2540.
https://doi.org/10.1016/j.apt.2019.07.033

Filipović S, Obradović N, Marković S, Mitrić M, Balać I, Đorđević A, Pavlović V. The effect of ball milling on properties of sintered manganese-doped alumina. in Advanced Powder Technology. 2019;30(11):2533-2540.
doi:10.1016/j.apt.2019.07.033 .

Filipović, Suzana, Obradović, Nina, Marković, Smilja, Mitrić, Miodrag, Balać, Igor, Đorđević, Antonije, Pavlović, Vladimir, "The effect of ball milling on properties of sintered manganese-doped alumina" in Advanced Powder Technology, 30, no. 11 (2019):2533-2540,
https://doi.org/10.1016/j.apt.2019.07.033 . .

TY  - JOUR
AU  - Obradović, Nina
AU  - Blagojević, Vladimir A.
AU  - Filipović, Suzana
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Kachlik, Martin
AU  - Maca, Karel
AU  - Pavlović, Vladimir B.
PY  - 2019
UR  - http://dais.sanu.ac.rs/123456789/4558
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5733
AB  - Thermally activated processes in cordierite-based ceramics were investigated to determine the effect of the mechanical activation and the addition of TeO2 on kinetic and thermodynamic parameters of these processes. Using a combination of dilatometry and DTA measurements in the 100–1400 °C temperature range, it was established that both the mechanical activation and the addition of TeO2 have a significant effect on processes in cordierite-based ceramics. A combination of 5 mass% addition of TeO2 and mechanical activation for 40 min reduced the sintering temperature of cordierite ceramics to around 1100 °C. In addition, the analysis of DTA measurements of mechanically activated samples indicates that the mechanical activation leads to intensification of the cordierite formation through an increase in concentration of surface defects and an increase in grain contact surface in the initial powder.
PB  - Springer
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Kinetics of thermally activated processes in cordierite-based ceramics
EP  - 2998
SP  - 2989
VL  - 138
DO  - 10.1007/s10973-018-7924-1
ER  - 

@article{
author = "Obradović, Nina and Blagojević, Vladimir A. and Filipović, Suzana and Đorđević, Nataša and Kosanović, Darko and Marković, Smilja and Kachlik, Martin and Maca, Karel and Pavlović, Vladimir B.",
year = "2019",
abstract = "Thermally activated processes in cordierite-based ceramics were investigated to determine the effect of the mechanical activation and the addition of TeO2 on kinetic and thermodynamic parameters of these processes. Using a combination of dilatometry and DTA measurements in the 100–1400 °C temperature range, it was established that both the mechanical activation and the addition of TeO2 have a significant effect on processes in cordierite-based ceramics. A combination of 5 mass% addition of TeO2 and mechanical activation for 40 min reduced the sintering temperature of cordierite ceramics to around 1100 °C. In addition, the analysis of DTA measurements of mechanically activated samples indicates that the mechanical activation leads to intensification of the cordierite formation through an increase in concentration of surface defects and an increase in grain contact surface in the initial powder.",
publisher = "Springer",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Kinetics of thermally activated processes in cordierite-based ceramics",
pages = "2998-2989",
volume = "138",
doi = "10.1007/s10973-018-7924-1"
}

Obradović, N., Blagojević, V. A., Filipović, S., Đorđević, N., Kosanović, D., Marković, S., Kachlik, M., Maca, K.,& Pavlović, V. B.. (2019). Kinetics of thermally activated processes in cordierite-based ceramics. in Journal of Thermal Analysis and Calorimetry
Springer., 138, 2989-2998.
https://doi.org/10.1007/s10973-018-7924-1

Obradović N, Blagojević VA, Filipović S, Đorđević N, Kosanović D, Marković S, Kachlik M, Maca K, Pavlović VB. Kinetics of thermally activated processes in cordierite-based ceramics. in Journal of Thermal Analysis and Calorimetry. 2019;138:2989-2998.
doi:10.1007/s10973-018-7924-1 .

Obradović, Nina, Blagojević, Vladimir A., Filipović, Suzana, Đorđević, Nataša, Kosanović, Darko, Marković, Smilja, Kachlik, Martin, Maca, Karel, Pavlović, Vladimir B., "Kinetics of thermally activated processes in cordierite-based ceramics" in Journal of Thermal Analysis and Calorimetry, 138 (2019):2989-2998,
https://doi.org/10.1007/s10973-018-7924-1 . .

TY  - CONF
AU  - Obradović, Nina
AU  - Fahrenholtz, William G.
AU  - Filipović, Suzana
AU  - Đorđević, Pavle
AU  - Marković, Smilja
AU  - Rogan, Jelena
AU  - Vulić, Predrag J.
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://dais.sanu.ac.rs/123456789/6980
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5748
AB  - Single crystalline phase MgAl2O4 is made from the predetermined composition of MgO-Al2O3 powder mixture by using ball-milling. Mixtures of MgO and Al2O3 are treated in planetary ball mill for 30, 60, 90 and 120 minutes, in air. The aim of this experiment was to examine phase composition, microstructure, and densification behavior of all sintered samples and to find out which sample has the best features for further use. After sintering in dilatometer at 1500 °C, XRD patterns and SEM images were recorded. The results show that mechanical activation is an efficient method to improve the densification behavior of MgAl2O4 sintered specimens. With the prolonged milling time, densities increased, reaching the maximum value of 2.8 g/cm3 for sample activated 120 minutes.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019
T1  - Characterization of MgAl2O4 sintered ceramics
EP  - 54
SP  - 54
UR  - https://hdl.handle.net/21.15107/rcub_dais_6980
ER  - 

@conference{
author = "Obradović, Nina and Fahrenholtz, William G. and Filipović, Suzana and Đorđević, Pavle and Marković, Smilja and Rogan, Jelena and Vulić, Predrag J. and Pavlović, Vladimir",
year = "2019",
abstract = "Single crystalline phase MgAl2O4 is made from the predetermined composition of MgO-Al2O3 powder mixture by using ball-milling. Mixtures of MgO and Al2O3 are treated in planetary ball mill for 30, 60, 90 and 120 minutes, in air. The aim of this experiment was to examine phase composition, microstructure, and densification behavior of all sintered samples and to find out which sample has the best features for further use. After sintering in dilatometer at 1500 °C, XRD patterns and SEM images were recorded. The results show that mechanical activation is an efficient method to improve the densification behavior of MgAl2O4 sintered specimens. With the prolonged milling time, densities increased, reaching the maximum value of 2.8 g/cm3 for sample activated 120 minutes.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019",
title = "Characterization of MgAl2O4 sintered ceramics",
pages = "54-54",
url = "https://hdl.handle.net/21.15107/rcub_dais_6980"
}

Obradović, N., Fahrenholtz, W. G., Filipović, S., Đorđević, P., Marković, S., Rogan, J., Vulić, P. J.,& Pavlović, V.. (2019). Characterization of MgAl2O4 sintered ceramics. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019
Belgrade : Serbian Ceramic Society., 54-54.
https://hdl.handle.net/21.15107/rcub_dais_6980

Obradović N, Fahrenholtz WG, Filipović S, Đorđević P, Marković S, Rogan J, Vulić PJ, Pavlović V. Characterization of MgAl2O4 sintered ceramics. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019. 2019;:54-54.
https://hdl.handle.net/21.15107/rcub_dais_6980 .

Obradović, Nina, Fahrenholtz, William G., Filipović, Suzana, Đorđević, Pavle, Marković, Smilja, Rogan, Jelena, Vulić, Predrag J., Pavlović, Vladimir, "Characterization of MgAl2O4 sintered ceramics" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019 (2019):54-54,
https://hdl.handle.net/21.15107/rcub_dais_6980 .

TY  - JOUR
AU  - Obradović, N.
AU  - Fahrenholtz, W.G.
AU  - Filipović, Suzana
AU  - Corlett, C.
AU  - Djordjević, P.
AU  - Rogan, J.
AU  - Vulić, Predrag J.
AU  - Buljak, V.
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5150
AB  - Single phase MgAl2O4 was made from a one-to-one molar ratio of MgO and Al2O3 powders mixed using ball-milling. Mixtures of MgO and Al2O3 were subsequently treated in planetary ball mill for 30, 60, 90 and 120 minutes in air. The aim of this study was to examine phase composition, microstructure, and densification behavior of sintered specimens. After sintering in dilatometer at 1500 °C, the powder was converted to single phase MgAl2O4. The results show that mechanical activation improved the densification behavior of MgAl2O4 sintered specimens, and it reduced the onset temperature for sintering by approx. 100oC. Based on dilatometer data, powders were subsequently densified at 1450oC by hot pressing. Almost аll specimens exhibited full density, while sample activated for 30 minutes showed the fastest densification rate.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Characterization of MgAl2O4 sintered ceramics
EP  - 376
IS  - 4
SP  - 363
VL  - 51
DO  - 10.2298/SOS1904363O
ER  - 

@article{
author = "Obradović, N. and Fahrenholtz, W.G. and Filipović, Suzana and Corlett, C. and Djordjević, P. and Rogan, J. and Vulić, Predrag J. and Buljak, V. and Pavlović, Vladimir",
year = "2019",
abstract = "Single phase MgAl2O4 was made from a one-to-one molar ratio of MgO and Al2O3 powders mixed using ball-milling. Mixtures of MgO and Al2O3 were subsequently treated in planetary ball mill for 30, 60, 90 and 120 minutes in air. The aim of this study was to examine phase composition, microstructure, and densification behavior of sintered specimens. After sintering in dilatometer at 1500 °C, the powder was converted to single phase MgAl2O4. The results show that mechanical activation improved the densification behavior of MgAl2O4 sintered specimens, and it reduced the onset temperature for sintering by approx. 100oC. Based on dilatometer data, powders were subsequently densified at 1450oC by hot pressing. Almost аll specimens exhibited full density, while sample activated for 30 minutes showed the fastest densification rate.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Characterization of MgAl2O4 sintered ceramics",
pages = "376-363",
number = "4",
volume = "51",
doi = "10.2298/SOS1904363O"
}

Obradović, N., Fahrenholtz, W.G., Filipović, S., Corlett, C., Djordjević, P., Rogan, J., Vulić, P. J., Buljak, V.,& Pavlović, V.. (2019). Characterization of MgAl2O4 sintered ceramics. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 51(4), 363-376.
https://doi.org/10.2298/SOS1904363O

Obradović N, Fahrenholtz W, Filipović S, Corlett C, Djordjević P, Rogan J, Vulić PJ, Buljak V, Pavlović V. Characterization of MgAl2O4 sintered ceramics. in Science of Sintering. 2019;51(4):363-376.
doi:10.2298/SOS1904363O .

Obradović, N., Fahrenholtz, W.G., Filipović, Suzana, Corlett, C., Djordjević, P., Rogan, J., Vulić, Predrag J., Buljak, V., Pavlović, Vladimir, "Characterization of MgAl2O4 sintered ceramics" in Science of Sintering, 51, no. 4 (2019):363-376,
https://doi.org/10.2298/SOS1904363O . .

TY  - CONF
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Marković, Smilja
AU  - Đorđević, Antonije
AU  - Dapčević, Aleksandra
AU  - Rogan, Jelena
AU  - Pavlović, Vladimir B.
PY  - 2018
UR  - http://dais.sanu.ac.rs/123456789/3634
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5725
AB  - Sintered alumina powder represents suitable material for usage in various industry fields (e.g., as chip carriers in electronics, microwaves, jewelry production), due to convenient physical properties, such as sinterability, electrical and mechanical features. Those properties can be modified by addition of different oxides and/or mechanical treatment. Therefore, in this investigation the alumina was doped with 1 wt. % of Cr2O3, Mn2O3 and NiO, respectively, followed by 1 hour of mechanical activation at 400 rpm in planetary ball mill. Sintering of powder mixtures was tracked by sensitive dilatometer up to 1400 °C. The final density values varied from cca. 2 ̶ 3.2 g/cm3. Changes in microstructure were observed by means of SEM. The influence of additives along with mechanical activation is monitored trough changes in electrical permittivity and loss tangent. Compared to pure alumina, the additives lower the relative permittivity and increase dielectric losses. For a given mixture, the sintering increases the relative permittivity and decreases losses.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018
T1  - Sintering of alumina doped with different oxides, followed by sensitive dilatometer
EP  - 95
SP  - 95
UR  - https://hdl.handle.net/21.15107/rcub_dais_3634
ER  - 

@conference{
author = "Filipović, Suzana and Obradović, Nina and Marković, Smilja and Đorđević, Antonije and Dapčević, Aleksandra and Rogan, Jelena and Pavlović, Vladimir B.",
year = "2018",
abstract = "Sintered alumina powder represents suitable material for usage in various industry fields (e.g., as chip carriers in electronics, microwaves, jewelry production), due to convenient physical properties, such as sinterability, electrical and mechanical features. Those properties can be modified by addition of different oxides and/or mechanical treatment. Therefore, in this investigation the alumina was doped with 1 wt. % of Cr2O3, Mn2O3 and NiO, respectively, followed by 1 hour of mechanical activation at 400 rpm in planetary ball mill. Sintering of powder mixtures was tracked by sensitive dilatometer up to 1400 °C. The final density values varied from cca. 2 ̶ 3.2 g/cm3. Changes in microstructure were observed by means of SEM. The influence of additives along with mechanical activation is monitored trough changes in electrical permittivity and loss tangent. Compared to pure alumina, the additives lower the relative permittivity and increase dielectric losses. For a given mixture, the sintering increases the relative permittivity and decreases losses.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018",
title = "Sintering of alumina doped with different oxides, followed by sensitive dilatometer",
pages = "95-95",
url = "https://hdl.handle.net/21.15107/rcub_dais_3634"
}

Filipović, S., Obradović, N., Marković, S., Đorđević, A., Dapčević, A., Rogan, J.,& Pavlović, V. B.. (2018). Sintering of alumina doped with different oxides, followed by sensitive dilatometer. in Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018
Belgrade : Materials Research Society of Serbia., 95-95.
https://hdl.handle.net/21.15107/rcub_dais_3634

Filipović S, Obradović N, Marković S, Đorđević A, Dapčević A, Rogan J, Pavlović VB. Sintering of alumina doped with different oxides, followed by sensitive dilatometer. in Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018. 2018;:95-95.
https://hdl.handle.net/21.15107/rcub_dais_3634 .

Filipović, Suzana, Obradović, Nina, Marković, Smilja, Đorđević, Antonije, Dapčević, Aleksandra, Rogan, Jelena, Pavlović, Vladimir B., "Sintering of alumina doped with different oxides, followed by sensitive dilatometer" in Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018 (2018):95-95,
https://hdl.handle.net/21.15107/rcub_dais_3634 .

TY  - CONF
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Đorđević, Antonije
AU  - Dapčević, Aleksandra
AU  - Rogan, Jelena
AU  - Pavlović, Vladimir B.
PY  - 2018
UR  - http://dais.sanu.ac.rs/123456789/4114
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5731
AB  - Recently, with the huge use of smart gadgets, developing of smart jewelry represents a very interesting segment in material science, as well as in electronic science. Alumina is widely used ceramic in many industrial fields as pigments, catalysis, microelectronics, etc., mostly because of its low cost and appropriate mechanical and electrical properties, high surface area and thermal stability. Also, modified alumina could be applied in production of smart jewelry. Thus, the main objectives of this investigation is to improve features of sintered alumina doped with Mn2O3 along with mechanical treatment, in order to obtain strong ceramic with low values of dielectric loss and low relative dielectric permittivity, as well as esthetic. Commercial alumina powder was doped with 1 wt % of manganese oxide and treated in planetary ball mill for an hour. Characteristic temperatures of both powders (non-activated and activated one) were investigated in detail by DTA and TG analyses. After sintering at 1200, 1300, and 1400 oC for 2 h, XRD patterns and SEM images were recorded. Furthermore, mechanical and electrical properties were examined for all sintered samples.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018
T1  - Effects of ball-milling on properties of sintered alumina doped with Mn2O3
EP  - 75
SP  - 75
UR  - https://hdl.handle.net/21.15107/rcub_dais_4114
ER  - 

@conference{
author = "Filipović, Suzana and Obradović, Nina and Marković, Smilja and Mitrić, Miodrag and Đorđević, Antonije and Dapčević, Aleksandra and Rogan, Jelena and Pavlović, Vladimir B.",
year = "2018",
abstract = "Recently, with the huge use of smart gadgets, developing of smart jewelry represents a very interesting segment in material science, as well as in electronic science. Alumina is widely used ceramic in many industrial fields as pigments, catalysis, microelectronics, etc., mostly because of its low cost and appropriate mechanical and electrical properties, high surface area and thermal stability. Also, modified alumina could be applied in production of smart jewelry. Thus, the main objectives of this investigation is to improve features of sintered alumina doped with Mn2O3 along with mechanical treatment, in order to obtain strong ceramic with low values of dielectric loss and low relative dielectric permittivity, as well as esthetic. Commercial alumina powder was doped with 1 wt % of manganese oxide and treated in planetary ball mill for an hour. Characteristic temperatures of both powders (non-activated and activated one) were investigated in detail by DTA and TG analyses. After sintering at 1200, 1300, and 1400 oC for 2 h, XRD patterns and SEM images were recorded. Furthermore, mechanical and electrical properties were examined for all sintered samples.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018",
title = "Effects of ball-milling on properties of sintered alumina doped with Mn2O3",
pages = "75-75",
url = "https://hdl.handle.net/21.15107/rcub_dais_4114"
}

Filipović, S., Obradović, N., Marković, S., Mitrić, M., Đorđević, A., Dapčević, A., Rogan, J.,& Pavlović, V. B.. (2018). Effects of ball-milling on properties of sintered alumina doped with Mn2O3. in Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018
Belgrade : Serbian Ceramic Society., 75-75.
https://hdl.handle.net/21.15107/rcub_dais_4114

Filipović S, Obradović N, Marković S, Mitrić M, Đorđević A, Dapčević A, Rogan J, Pavlović VB. Effects of ball-milling on properties of sintered alumina doped with Mn2O3. in Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018. 2018;:75-75.
https://hdl.handle.net/21.15107/rcub_dais_4114 .

Filipović, Suzana, Obradović, Nina, Marković, Smilja, Mitrić, Miodrag, Đorđević, Antonije, Dapčević, Aleksandra, Rogan, Jelena, Pavlović, Vladimir B., "Effects of ball-milling on properties of sintered alumina doped with Mn2O3" in Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018 (2018):75-75,
https://hdl.handle.net/21.15107/rcub_dais_4114 .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Marković, Smilja
AU  - Djordjević, Antonije
AU  - Balac, Igor
AU  - Dapcević, Aleksandra
AU  - Rogan, Jelena
AU  - Pavlović, Vladimir
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4712
AB  - Corundum (alpha-alumina) is a suiTab. material for usage in various industry fields owing to its chemical stability, electrical and mechanical features. It is known that properties of ceramics could be modified by addition of different oxides, as well as by changing the consolidation parameters. In this respect, alumina was doped with 1 wt.% of Cr2O3, Mn2O3 and NiO, followed by 1 hour of mechanical activation in a high-energy planetary ball mill. A sensitive dilatometer was used for sintering of powder mixtures up to 1400 degrees C and recording the obtained dilatation. The final density varied between cca. 1.9 and 3.3 g/cm(3). Microstructural changes were detected by SEM measurements. Changes in electrical permittivity and loss tangent were associated with the preparation conditions (types of additives, duration of mechanical activation). For a given mixture, the sintering increases the relative permittivity and decreases losses, exhibiting the optimal values of 8.32 and 0.027, respectively, for the sample activated 60 minutes and sintered, with the addition of MnO2. Mechanical measurements indicate significant differences in strength with the addition of different transition metal oxides. Samples with Mn and Ni, activated and sintered, with strength of 121 and 86 MPa, respectively, have a significantly higher tensile strength than the other tested samples, due to their more compact microstructures.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Physical Properties of Sintered Alumina Doped with Different Oxides
EP  - 419
IS  - 4
SP  - 409
VL  - 50
DO  - 10.2298/SOS1804409F
ER  - 

@article{
author = "Filipović, Suzana and Obradović, Nina and Marković, Smilja and Djordjević, Antonije and Balac, Igor and Dapcević, Aleksandra and Rogan, Jelena and Pavlović, Vladimir",
year = "2018",
abstract = "Corundum (alpha-alumina) is a suiTab. material for usage in various industry fields owing to its chemical stability, electrical and mechanical features. It is known that properties of ceramics could be modified by addition of different oxides, as well as by changing the consolidation parameters. In this respect, alumina was doped with 1 wt.% of Cr2O3, Mn2O3 and NiO, followed by 1 hour of mechanical activation in a high-energy planetary ball mill. A sensitive dilatometer was used for sintering of powder mixtures up to 1400 degrees C and recording the obtained dilatation. The final density varied between cca. 1.9 and 3.3 g/cm(3). Microstructural changes were detected by SEM measurements. Changes in electrical permittivity and loss tangent were associated with the preparation conditions (types of additives, duration of mechanical activation). For a given mixture, the sintering increases the relative permittivity and decreases losses, exhibiting the optimal values of 8.32 and 0.027, respectively, for the sample activated 60 minutes and sintered, with the addition of MnO2. Mechanical measurements indicate significant differences in strength with the addition of different transition metal oxides. Samples with Mn and Ni, activated and sintered, with strength of 121 and 86 MPa, respectively, have a significantly higher tensile strength than the other tested samples, due to their more compact microstructures.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Physical Properties of Sintered Alumina Doped with Different Oxides",
pages = "419-409",
number = "4",
volume = "50",
doi = "10.2298/SOS1804409F"
}

Filipović, S., Obradović, N., Marković, S., Djordjević, A., Balac, I., Dapcević, A., Rogan, J.,& Pavlović, V.. (2018). Physical Properties of Sintered Alumina Doped with Different Oxides. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 50(4), 409-419.
https://doi.org/10.2298/SOS1804409F

Filipović S, Obradović N, Marković S, Djordjević A, Balac I, Dapcević A, Rogan J, Pavlović V. Physical Properties of Sintered Alumina Doped with Different Oxides. in Science of Sintering. 2018;50(4):409-419.
doi:10.2298/SOS1804409F .

Filipović, Suzana, Obradović, Nina, Marković, Smilja, Djordjević, Antonije, Balac, Igor, Dapcević, Aleksandra, Rogan, Jelena, Pavlović, Vladimir, "Physical Properties of Sintered Alumina Doped with Different Oxides" in Science of Sintering, 50, no. 4 (2018):409-419,
https://doi.org/10.2298/SOS1804409F . .