TY  - JOUR
AU  - Stojanović, Srna Stojanović
AU  - Rac, Vladislav
AU  - Mojsilović, Kristina Mojsilović
AU  - Vasilić, Rastko
AU  - Marković, Smilja
AU  - Damjanović-Vasilić, Ljiljana
PY  - 2023
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6383
AB  - Photocatalytic degradation of bisphenol A (BPA) was investigated using commercial TiO2 P25 nanoparticles supported on natural zeolite clinoptilolite (Cli). Employing ultrasound assisted solid-state dispersion method hybrid photocatalyst containing 20 wt% of TiO2, marked TCli-20, was prepared. The structural, morphological and surface properties, and particle size distribution of TCli-20 were studied by X-ray powder diffraction, Fourier transform infrared spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, scanning electron microscopy with energy dispersive spectroscopy, atomic force microscopy, Brunner-Emmet-Teller method and laser diffraction. The results revealed a successful loading of TiO2 P25 nanoparticles on Cli surface and the preservation of both zeolitic structure and optical properties of TiO2. The influence of catalyst dose, pH value and the addition of hydrogen peroxide (H2O2) was evaluated. The optimal reaction conditions were 2 g/L of catalyst at near-neutral conditions (pH = 6.4) for complete BPA (5 mg/L) photodegradation after 180 min of exposure to simulated solar light. The addition of H2O2 was beneficial for the degradation process and led to the removal of BPA after 120 min of irradiation. BPA removal (60% for 180 min of irradiation) was reduced when TCli-20 was tested in bottled drinking water due to the presence of bicarbonate ions which acted as scavengers for hydroxyl radicals. Even though the photocatalytic activity of TCli-20 decreased after several cycles of usage, 70% of BPA was still successfully degraded during the fourth cycle. The reusability study showed easy separation, stability and good photocatalytic ability of investigated cost-effective hybrid photocatalyst. © 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
T2  - Environmental Science and Pollution Research
T2  - Environmental Science and Pollution Research
T1  - Photocatalytic degradation of bisphenol A in aqueous solution using TiO2/clinoptilolite hybrid photocatalyst
DO  - 10.1007/s11356-023-28397-w
ER  - 

@article{
author = "Stojanović, Srna Stojanović and Rac, Vladislav and Mojsilović, Kristina Mojsilović and Vasilić, Rastko and Marković, Smilja and Damjanović-Vasilić, Ljiljana",
year = "2023",
abstract = "Photocatalytic degradation of bisphenol A (BPA) was investigated using commercial TiO2 P25 nanoparticles supported on natural zeolite clinoptilolite (Cli). Employing ultrasound assisted solid-state dispersion method hybrid photocatalyst containing 20 wt% of TiO2, marked TCli-20, was prepared. The structural, morphological and surface properties, and particle size distribution of TCli-20 were studied by X-ray powder diffraction, Fourier transform infrared spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, scanning electron microscopy with energy dispersive spectroscopy, atomic force microscopy, Brunner-Emmet-Teller method and laser diffraction. The results revealed a successful loading of TiO2 P25 nanoparticles on Cli surface and the preservation of both zeolitic structure and optical properties of TiO2. The influence of catalyst dose, pH value and the addition of hydrogen peroxide (H2O2) was evaluated. The optimal reaction conditions were 2 g/L of catalyst at near-neutral conditions (pH = 6.4) for complete BPA (5 mg/L) photodegradation after 180 min of exposure to simulated solar light. The addition of H2O2 was beneficial for the degradation process and led to the removal of BPA after 120 min of irradiation. BPA removal (60% for 180 min of irradiation) was reduced when TCli-20 was tested in bottled drinking water due to the presence of bicarbonate ions which acted as scavengers for hydroxyl radicals. Even though the photocatalytic activity of TCli-20 decreased after several cycles of usage, 70% of BPA was still successfully degraded during the fourth cycle. The reusability study showed easy separation, stability and good photocatalytic ability of investigated cost-effective hybrid photocatalyst. © 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.",
journal = "Environmental Science and Pollution Research, Environmental Science and Pollution Research",
title = "Photocatalytic degradation of bisphenol A in aqueous solution using TiO2/clinoptilolite hybrid photocatalyst",
doi = "10.1007/s11356-023-28397-w"
}

Stojanović, S. S., Rac, V., Mojsilović, K. M., Vasilić, R., Marković, S.,& Damjanović-Vasilić, L.. (2023). Photocatalytic degradation of bisphenol A in aqueous solution using TiO2/clinoptilolite hybrid photocatalyst. in Environmental Science and Pollution Research.
https://doi.org/10.1007/s11356-023-28397-w

Stojanović SS, Rac V, Mojsilović KM, Vasilić R, Marković S, Damjanović-Vasilić L. Photocatalytic degradation of bisphenol A in aqueous solution using TiO2/clinoptilolite hybrid photocatalyst. in Environmental Science and Pollution Research. 2023;.
doi:10.1007/s11356-023-28397-w .

Stojanović, Srna Stojanović, Rac, Vladislav, Mojsilović, Kristina Mojsilović, Vasilić, Rastko, Marković, Smilja, Damjanović-Vasilić, Ljiljana, "Photocatalytic degradation of bisphenol A in aqueous solution using TiO2/clinoptilolite hybrid photocatalyst" in Environmental Science and Pollution Research (2023),
https://doi.org/10.1007/s11356-023-28397-w . .

TY  - JOUR
AU  - Aleksić, Katarina
AU  - Stojković Simatović, Ivana
AU  - Stanković, Ana
AU  - Veselinović, Ljiljana
AU  - Stojadinović, Stevan
AU  - Rac, Vladislav
AU  - Radmilović, Nadežda
AU  - Rajić, Vladimir
AU  - Škapin, Srečo Davor
AU  - Mančić, Lidija
AU  - Marković, Smilja
PY  - 2023
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6368
AB  - Catalytic materials are the greatest challenge for the commercial application of water electrolysis (WEs) and fuel cells (FCs) as clean energy technologies. There is a need to find an alternative to expensive and unavailable platinum group metal (PGM) catalysts. This study aimed to reduce the cost of PGM materials by replacing Ru with RuO2 and lowering the amount of RuO2 by adding abundant and multifunctional ZnO. A ZnO@RuO2 composite in a 10:1 molar ratio was synthesized by microwave processing of a precipitate as a green, low-cost, and fast method, and then annealed at 300°C and 600°C to improve the catalytic properties. The physicochemical properties of the ZnO@RuO2 composites were investigated by X-ray powder diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), UV-Vis diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) spectroscopy. The electrochemical activity of the samples was investigated by linear sweep voltammetry in acidic and alkaline electrolytes. We observed good bifunctional catalytic activity of the ZnO@RuO2 composites toward HER and OER in both electrolytes. The improved bifunctional catalytic activity of the ZnO@RuO2 composite by annealing was discussed and attributed to the reduced number of bulk oxygen vacancies and the increased number of established heterojunctions. Copyright © 2023 Aleksić, Stojković Simatović, Stanković, Veselinović, Stojadinović, Rac, Radmilović, Rajić, Škapin, Mančić and Marković.
T2  - Frontiers in Chemistry
T2  - Frontiers in Chemistry
T1  - Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting
VL  - 11
DO  - 10.3389/fchem.2023.1173910
ER  - 

@article{
author = "Aleksić, Katarina and Stojković Simatović, Ivana and Stanković, Ana and Veselinović, Ljiljana and Stojadinović, Stevan and Rac, Vladislav and Radmilović, Nadežda and Rajić, Vladimir and Škapin, Srečo Davor and Mančić, Lidija and Marković, Smilja",
year = "2023",
abstract = "Catalytic materials are the greatest challenge for the commercial application of water electrolysis (WEs) and fuel cells (FCs) as clean energy technologies. There is a need to find an alternative to expensive and unavailable platinum group metal (PGM) catalysts. This study aimed to reduce the cost of PGM materials by replacing Ru with RuO2 and lowering the amount of RuO2 by adding abundant and multifunctional ZnO. A ZnO@RuO2 composite in a 10:1 molar ratio was synthesized by microwave processing of a precipitate as a green, low-cost, and fast method, and then annealed at 300°C and 600°C to improve the catalytic properties. The physicochemical properties of the ZnO@RuO2 composites were investigated by X-ray powder diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), UV-Vis diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) spectroscopy. The electrochemical activity of the samples was investigated by linear sweep voltammetry in acidic and alkaline electrolytes. We observed good bifunctional catalytic activity of the ZnO@RuO2 composites toward HER and OER in both electrolytes. The improved bifunctional catalytic activity of the ZnO@RuO2 composite by annealing was discussed and attributed to the reduced number of bulk oxygen vacancies and the increased number of established heterojunctions. Copyright © 2023 Aleksić, Stojković Simatović, Stanković, Veselinović, Stojadinović, Rac, Radmilović, Rajić, Škapin, Mančić and Marković.",
journal = "Frontiers in Chemistry, Frontiers in Chemistry",
title = "Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting",
volume = "11",
doi = "10.3389/fchem.2023.1173910"
}

Aleksić, K., Stojković Simatović, I., Stanković, A., Veselinović, L., Stojadinović, S., Rac, V., Radmilović, N., Rajić, V., Škapin, S. D., Mančić, L.,& Marković, S.. (2023). Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting. in Frontiers in Chemistry, 11.
https://doi.org/10.3389/fchem.2023.1173910

Aleksić K, Stojković Simatović I, Stanković A, Veselinović L, Stojadinović S, Rac V, Radmilović N, Rajić V, Škapin SD, Mančić L, Marković S. Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting. in Frontiers in Chemistry. 2023;11.
doi:10.3389/fchem.2023.1173910 .

Aleksić, Katarina, Stojković Simatović, Ivana, Stanković, Ana, Veselinović, Ljiljana, Stojadinović, Stevan, Rac, Vladislav, Radmilović, Nadežda, Rajić, Vladimir, Škapin, Srečo Davor, Mančić, Lidija, Marković, Smilja, "Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting" in Frontiers in Chemistry, 11 (2023),
https://doi.org/10.3389/fchem.2023.1173910 . .

TY  - JOUR
AU  - Bosnar, Sanja
AU  - Rac, Vladislav
AU  - Stošić, Dušan
AU  - Travert, Arnaud
AU  - Postole, Georgeta
AU  - Auroux, Aline
AU  - Škapin, Srečo
AU  - Damjanović-Vasilić, Ljiljana
AU  - Bronić, Josip
AU  - Du, Xuesen
AU  - Marković, Smilja
AU  - Pavlović, Vladimir
AU  - Rakić, Vesna
PY  - 2021
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5961
AB  - Dual templating approach, using hexadecyltrimethylammonium bromide (CTAB), was employed in an attempt to synthesize hierarchical ZSM-5 zeolite. Amount of mesoporogen and the duration of aging of the precursor were varied. Majority of the synthesis routes resulted in phase separation, yielding separate ZSM-5 and amorphous mesoporous material. The relative amounts of the two phases were dependent on the CTAB amount ratio and also significantly on the duration of precursor aging before CTAB addition. One particular combination of the two factors led to the formation of a homogeneous hierarchical form of ZSM-5 with leafy morphology, consisting of intergrown thin crystalline sheets which formed flower-like structures. The hierarchical ZSM-5 possessed significant microporous (≈95 m2/g) and highly developed mesoporous surface (≈470 m2/g), with a relatively broad distribution of mesopore sizes (<20 nm). The acidity of all samples was studied in detail. Isothermal microcalorimetry/volumetry of ammonia adsorption provided quantitative data on the number and distribution of strength of acidic sites. In situ FTIR of pyridine and collidine adsorption was used to quantify Brønsted and Lewis acid sites, and to provide information on their location - in the micropores or mesopores/external surface. The hierarchical ZSM-5 possessed both Lewis and Brønsted acidity, with Brønsted sites located mainly in the micropores. All samples were fully characterized using XRD, low temperature nitrogen adsorption, FESEM and EDS. The synthetic route used for obtaining the ZSM-5 zeolite with flower-like morphology is a simple strategy for preparing hierarchical ZSM-5 forms targeting enhanced diffusivity and accessibility of catalytically active sites.
PB  - Elsevier B.V.
T2  - Microporous and Mesoporous Materials
T1  - Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study
SP  - 111534
VL  - 329
DO  - 10.1016/j.micromeso.2021.111534
ER  - 

@article{
author = "Bosnar, Sanja and Rac, Vladislav and Stošić, Dušan and Travert, Arnaud and Postole, Georgeta and Auroux, Aline and Škapin, Srečo and Damjanović-Vasilić, Ljiljana and Bronić, Josip and Du, Xuesen and Marković, Smilja and Pavlović, Vladimir and Rakić, Vesna",
year = "2021",
abstract = "Dual templating approach, using hexadecyltrimethylammonium bromide (CTAB), was employed in an attempt to synthesize hierarchical ZSM-5 zeolite. Amount of mesoporogen and the duration of aging of the precursor were varied. Majority of the synthesis routes resulted in phase separation, yielding separate ZSM-5 and amorphous mesoporous material. The relative amounts of the two phases were dependent on the CTAB amount ratio and also significantly on the duration of precursor aging before CTAB addition. One particular combination of the two factors led to the formation of a homogeneous hierarchical form of ZSM-5 with leafy morphology, consisting of intergrown thin crystalline sheets which formed flower-like structures. The hierarchical ZSM-5 possessed significant microporous (≈95 m2/g) and highly developed mesoporous surface (≈470 m2/g), with a relatively broad distribution of mesopore sizes (<20 nm). The acidity of all samples was studied in detail. Isothermal microcalorimetry/volumetry of ammonia adsorption provided quantitative data on the number and distribution of strength of acidic sites. In situ FTIR of pyridine and collidine adsorption was used to quantify Brønsted and Lewis acid sites, and to provide information on their location - in the micropores or mesopores/external surface. The hierarchical ZSM-5 possessed both Lewis and Brønsted acidity, with Brønsted sites located mainly in the micropores. All samples were fully characterized using XRD, low temperature nitrogen adsorption, FESEM and EDS. The synthetic route used for obtaining the ZSM-5 zeolite with flower-like morphology is a simple strategy for preparing hierarchical ZSM-5 forms targeting enhanced diffusivity and accessibility of catalytically active sites.",
publisher = "Elsevier B.V.",
journal = "Microporous and Mesoporous Materials",
title = "Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study",
pages = "111534",
volume = "329",
doi = "10.1016/j.micromeso.2021.111534"
}

Bosnar, S., Rac, V., Stošić, D., Travert, A., Postole, G., Auroux, A., Škapin, S., Damjanović-Vasilić, L., Bronić, J., Du, X., Marković, S., Pavlović, V.,& Rakić, V.. (2021). Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study. in Microporous and Mesoporous Materials
Elsevier B.V.., 329, 111534.
https://doi.org/10.1016/j.micromeso.2021.111534

Bosnar S, Rac V, Stošić D, Travert A, Postole G, Auroux A, Škapin S, Damjanović-Vasilić L, Bronić J, Du X, Marković S, Pavlović V, Rakić V. Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study. in Microporous and Mesoporous Materials. 2021;329:111534.
doi:10.1016/j.micromeso.2021.111534 .

Bosnar, Sanja, Rac, Vladislav, Stošić, Dušan, Travert, Arnaud, Postole, Georgeta, Auroux, Aline, Škapin, Srečo, Damjanović-Vasilić, Ljiljana, Bronić, Josip, Du, Xuesen, Marković, Smilja, Pavlović, Vladimir, Rakić, Vesna, "Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study" in Microporous and Mesoporous Materials, 329 (2021):111534,
https://doi.org/10.1016/j.micromeso.2021.111534 . .

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  - 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  - 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  - 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  - 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  - CONF
AU  - Labus, Nebojša
AU  - Marković, Smilja
AU  - Nikolić, Maria Vesna
AU  - Krstić, Jugoslav
AU  - Pavlović, Vladimir B.
PY  - 2018
UR  - http://dais.sanu.ac.rs/123456789/4099
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5730
AB  - During the compaction of the powder mixture of ZnO and Mn2O3 (MnCO3) and Fe2O3 compacts were find fragile for further handling. Poly vinyl alcohol PVA was used as a binder in an unusual 20% PVA content. We made as well 2% PVA with 0.6% Poly ethylene glycol PEG and 20% PVA with 6 % PEG. Binder was wrapped over the powder by suspension forming in the polymer water solution and drying afterwards until all water content evaporates. On the these obtained powders employed characterization techniques were: Fourier transformed Infra red FTIR spectra with ATR attenuated total reflection technique as well as differential thermal analysis DTA on the device with low temperature sensitivity and TEM transmition electron microscopy. All binder concentrations gave compacts with good mechanical properties, that can be handled with ease but with adding, a PEG as plasticizer the operating of the anvil and piston were extremely difficult due to friction.
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  - Polyvinyl alcohol PVA with poly ethylene Glycol PEG added as a binder for the powder compaction
EP  - 83
SP  - 83
UR  - https://hdl.handle.net/21.15107/rcub_dais_4099
ER  - 

@conference{
author = "Labus, Nebojša and Marković, Smilja and Nikolić, Maria Vesna and Krstić, Jugoslav and Pavlović, Vladimir B.",
year = "2018",
abstract = "During the compaction of the powder mixture of ZnO and Mn2O3 (MnCO3) and Fe2O3 compacts were find fragile for further handling. Poly vinyl alcohol PVA was used as a binder in an unusual 20% PVA content. We made as well 2% PVA with 0.6% Poly ethylene glycol PEG and 20% PVA with 6 % PEG. Binder was wrapped over the powder by suspension forming in the polymer water solution and drying afterwards until all water content evaporates. On the these obtained powders employed characterization techniques were: Fourier transformed Infra red FTIR spectra with ATR attenuated total reflection technique as well as differential thermal analysis DTA on the device with low temperature sensitivity and TEM transmition electron microscopy. All binder concentrations gave compacts with good mechanical properties, that can be handled with ease but with adding, a PEG as plasticizer the operating of the anvil and piston were extremely difficult due to friction.",
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 = "Polyvinyl alcohol PVA with poly ethylene Glycol PEG added as a binder for the powder compaction",
pages = "83-83",
url = "https://hdl.handle.net/21.15107/rcub_dais_4099"
}

Labus, N., Marković, S., Nikolić, M. V., Krstić, J.,& Pavlović, V. B.. (2018). Polyvinyl alcohol PVA with poly ethylene Glycol PEG added as a binder for the powder compaction. 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., 83-83.
https://hdl.handle.net/21.15107/rcub_dais_4099

Labus N, Marković S, Nikolić MV, Krstić J, Pavlović VB. Polyvinyl alcohol PVA with poly ethylene Glycol PEG added as a binder for the powder compaction. 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;:83-83.
https://hdl.handle.net/21.15107/rcub_dais_4099 .

Labus, Nebojša, Marković, Smilja, Nikolić, Maria Vesna, Krstić, Jugoslav, Pavlović, Vladimir B., "Polyvinyl alcohol PVA with poly ethylene Glycol PEG added as a binder for the powder compaction" 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):83-83,
https://hdl.handle.net/21.15107/rcub_dais_4099 .

TY  - CONF
AU  - Labus, Nebojša
AU  - Vasiljević, Zorka Ž.
AU  - Aleksić, Obrad S.
AU  - Vuković, Miloljub
AU  - Marković, Smilja
AU  - Pavlović, Vladimir B.
AU  - Mentus, Slavko
AU  - Nikolić, Maria Vesna
PY  - 2016
UR  - http://dais.sanu.ac.rs/123456789/869
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5713
AB  - Commercial Mn-Zn powder (Mn0.63Zn0.37Fe2O4, 93 wt. % and Fe2O3 7 wt. %) was milled 0.5, 1, 2 and 4 hours in a planetary ball mill. Powders were characterized with XRD, SEM and particle seizer. Subsequent heating was monitored on TGA/DTA in air atmosphere. After compaction of the milled powders, sintering was also performed in a dilatometric device. Sintered specimens were characterized microstructurally with SEM on a fresh breakage. Ferrite powders changed with milling as well as with second run heating are characterised to approach the possible best ratio of the milling and heating that should be used to obtain desired micrstructure.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : V Serbian Ceramic Society Conference, Sep 21-23 September 2016, Belgrade
T1  - Characterisation of Mn0.63Zn0.37Fe2O4 powders after intensive milling and subsequent thermal treatment
EP  - 48
SP  - 48
UR  - https://hdl.handle.net/21.15107/rcub_dais_869
ER  - 

@conference{
author = "Labus, Nebojša and Vasiljević, Zorka Ž. and Aleksić, Obrad S. and Vuković, Miloljub and Marković, Smilja and Pavlović, Vladimir B. and Mentus, Slavko and Nikolić, Maria Vesna",
year = "2016",
abstract = "Commercial Mn-Zn powder (Mn0.63Zn0.37Fe2O4, 93 wt. % and Fe2O3 7 wt. %) was milled 0.5, 1, 2 and 4 hours in a planetary ball mill. Powders were characterized with XRD, SEM and particle seizer. Subsequent heating was monitored on TGA/DTA in air atmosphere. After compaction of the milled powders, sintering was also performed in a dilatometric device. Sintered specimens were characterized microstructurally with SEM on a fresh breakage. Ferrite powders changed with milling as well as with second run heating are characterised to approach the possible best ratio of the milling and heating that should be used to obtain desired micrstructure.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : V Serbian Ceramic Society Conference, Sep 21-23 September 2016, Belgrade",
title = "Characterisation of Mn0.63Zn0.37Fe2O4 powders after intensive milling and subsequent thermal treatment",
pages = "48-48",
url = "https://hdl.handle.net/21.15107/rcub_dais_869"
}

Labus, N., Vasiljević, Z. Ž., Aleksić, O. S., Vuković, M., Marković, S., Pavlović, V. B., Mentus, S.,& Nikolić, M. V.. (2016). Characterisation of Mn0.63Zn0.37Fe2O4 powders after intensive milling and subsequent thermal treatment. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : V Serbian Ceramic Society Conference, Sep 21-23 September 2016, Belgrade
Belgrade : Serbian Ceramic Society., 48-48.
https://hdl.handle.net/21.15107/rcub_dais_869

Labus N, Vasiljević ZŽ, Aleksić OS, Vuković M, Marković S, Pavlović VB, Mentus S, Nikolić MV. Characterisation of Mn0.63Zn0.37Fe2O4 powders after intensive milling and subsequent thermal treatment. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : V Serbian Ceramic Society Conference, Sep 21-23 September 2016, Belgrade. 2016;:48-48.
https://hdl.handle.net/21.15107/rcub_dais_869 .

Labus, Nebojša, Vasiljević, Zorka Ž., Aleksić, Obrad S., Vuković, Miloljub, Marković, Smilja, Pavlović, Vladimir B., Mentus, Slavko, Nikolić, Maria Vesna, "Characterisation of Mn0.63Zn0.37Fe2O4 powders after intensive milling and subsequent thermal treatment" in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : V Serbian Ceramic Society Conference, Sep 21-23 September 2016, Belgrade (2016):48-48,
https://hdl.handle.net/21.15107/rcub_dais_869 .

TY  - CONF
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Antić, Vesna
AU  - Pavlović, Vladimir B.
PY  - 2016
UR  - http://dais.sanu.ac.rs/123456789/874
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5714
AB  - In this study, highly porous macro- and micro-cellular wollastonite-based ceramics was synthesized. Ceramic precursor, methylhydrocyclosiloxane, together with micro-sized CaCO3, was used as starting material. After 20 min of ultrasound treatment, and calcination at 250 oC for 30 min, different pore-forming agents were added to the as-obtained powders. Differential thermal analysis was used to determine characteristic temperatures of processes occurring within powders during heating. Based on the obtained results, sintering regime was set up. Prepared mixtures were pressed into pallets and sintered at 900 oC. During the sintering regime, highly porous wollastonite-based ceramics was obtained. The phase composition of the sintered samples as well as microstructures was analyzed by the means of X-ray diffraction method and SEM. Two-phase system was detected in all samples, CaSiO3 wollastonite and Ca2SiO4 larnite, and their ratio varied with each pore-forming agent. It was observed that addition of different pore-forming agent resulted in significantly different microstructures.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : V Serbian Ceramic Society Conference, Sep 21-23 September 2016, Belgrade
T1  - Influence of different pore-forming agents on wollastonite microstructures
EP  - 42
SP  - 42
UR  - https://hdl.handle.net/21.15107/rcub_dais_874
ER  - 

@conference{
author = "Obradović, Nina and Filipović, Suzana and Marković, Smilja and Mitrić, Miodrag and Antić, Vesna and Pavlović, Vladimir B.",
year = "2016",
abstract = "In this study, highly porous macro- and micro-cellular wollastonite-based ceramics was synthesized. Ceramic precursor, methylhydrocyclosiloxane, together with micro-sized CaCO3, was used as starting material. After 20 min of ultrasound treatment, and calcination at 250 oC for 30 min, different pore-forming agents were added to the as-obtained powders. Differential thermal analysis was used to determine characteristic temperatures of processes occurring within powders during heating. Based on the obtained results, sintering regime was set up. Prepared mixtures were pressed into pallets and sintered at 900 oC. During the sintering regime, highly porous wollastonite-based ceramics was obtained. The phase composition of the sintered samples as well as microstructures was analyzed by the means of X-ray diffraction method and SEM. Two-phase system was detected in all samples, CaSiO3 wollastonite and Ca2SiO4 larnite, and their ratio varied with each pore-forming agent. It was observed that addition of different pore-forming agent resulted in significantly different microstructures.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : V Serbian Ceramic Society Conference, Sep 21-23 September 2016, Belgrade",
title = "Influence of different pore-forming agents on wollastonite microstructures",
pages = "42-42",
url = "https://hdl.handle.net/21.15107/rcub_dais_874"
}

Obradović, N., Filipović, S., Marković, S., Mitrić, M., Antić, V.,& Pavlović, V. B.. (2016). Influence of different pore-forming agents on wollastonite microstructures. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : V Serbian Ceramic Society Conference, Sep 21-23 September 2016, Belgrade
Belgrade : Serbian Ceramic Society., 42-42.
https://hdl.handle.net/21.15107/rcub_dais_874

Obradović N, Filipović S, Marković S, Mitrić M, Antić V, Pavlović VB. Influence of different pore-forming agents on wollastonite microstructures. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : V Serbian Ceramic Society Conference, Sep 21-23 September 2016, Belgrade. 2016;:42-42.
https://hdl.handle.net/21.15107/rcub_dais_874 .

Obradović, Nina, Filipović, Suzana, Marković, Smilja, Mitrić, Miodrag, Antić, Vesna, Pavlović, Vladimir B., "Influence of different pore-forming agents on wollastonite microstructures" in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : V Serbian Ceramic Society Conference, Sep 21-23 September 2016, Belgrade (2016):42-42,
https://hdl.handle.net/21.15107/rcub_dais_874 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2016
UR  - http://dais.sanu.ac.rs/123456789/894
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5719
AB  - Cordierite 2MgO+2Al2O3+5SiO2 is frequently used ceramic material, that is commonly used as a carrier of electrical components due to its low dielectric constant (~ 5), and low temperature thermal expansion coefficient (20•10-7 ºC-1). In order to accelerate the process of sintering, 5.00 mass% TeO2 was added to the starting mixtures. System was tested in two parallel mixtures, one with no added additives, and the other one with TeO2. The mechanical activation of the both mixtures was performed in a high-energy ball mill in time intervals from 0 to 40 min with ball to powder mass ratio 1:40. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders as well as microstructures was analyzed by the means of X-ray diffraction method and SEM.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016
T1  - Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2
EP  - 75
SP  - 75
UR  - https://hdl.handle.net/21.15107/rcub_dais_894
ER  - 

@conference{
author = "Đorđević, Nataša and Obradović, Nina and Filipović, Suzana and Kosanović, Darko and Marković, Smilja and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2016",
abstract = "Cordierite 2MgO+2Al2O3+5SiO2 is frequently used ceramic material, that is commonly used as a carrier of electrical components due to its low dielectric constant (~ 5), and low temperature thermal expansion coefficient (20•10-7 ºC-1). In order to accelerate the process of sintering, 5.00 mass% TeO2 was added to the starting mixtures. System was tested in two parallel mixtures, one with no added additives, and the other one with TeO2. The mechanical activation of the both mixtures was performed in a high-energy ball mill in time intervals from 0 to 40 min with ball to powder mass ratio 1:40. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders as well as microstructures was analyzed by the means of X-ray diffraction method and SEM.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016",
title = "Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2",
pages = "75-75",
url = "https://hdl.handle.net/21.15107/rcub_dais_894"
}

Đorđević, N., Obradović, N., Filipović, S., Kosanović, D., Marković, S., Mitrić, M.,& Pavlović, V. B.. (2016). Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2. in Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016
Belgrade : Materials Research Society of Serbia., 75-75.
https://hdl.handle.net/21.15107/rcub_dais_894

Đorđević N, Obradović N, Filipović S, Kosanović D, Marković S, Mitrić M, Pavlović VB. Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2. in Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016. 2016;:75-75.
https://hdl.handle.net/21.15107/rcub_dais_894 .

Đorđević, Nataša, Obradović, Nina, Filipović, Suzana, Kosanović, Darko, Marković, Smilja, Mitrić, Miodrag, Pavlović, Vladimir B., "Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2" in Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016 (2016):75-75,
https://hdl.handle.net/21.15107/rcub_dais_894 .

TY  - CONF
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Filipović, Suzana
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2015
UR  - http://dais.sanu.ac.rs/123456789/761
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5708
AB  - Cordierite, 2MgO•2Ah03•5Si02 (MAS), is a very attractive high-temperature ceramic material. In order to accelerate the process of sintering, 5.00 mass% Mo03 was added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill in time intervals from 0 to 160 minutes. In following, starting mixtures were sintered at 1300 °C for 2h. In order to determine the changes in the particle size distribution, the mechanically treated powders were characterized by a laser light-scattering particle size analyzer. The phase composition of the starting mixtures and sintered samples was analyzed by the X-ray diffraction method. Differential thermal analyses (DTA) and thermo-gravimetric (TG) analysis were used in order to determine characteristic temperatures. Kissinger's equation was employed to calculate apparent activation energies of various processes that occur within the system while heating. Based on the obtained DTA results, it was established that mechanical activation along with MoO3 additive, has influence on sintering temperature which was decreased for about 150 °C.
PB  - Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry
C3  - 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts
T1  - Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA
EP  - 195
SP  - 195
UR  - https://hdl.handle.net/21.15107/rcub_dais_761
ER  - 

@conference{
author = "Obradović, Nina and Đorđević, Nataša and Kosanović, Darko and Filipović, Suzana and Marković, Smilja and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2015",
abstract = "Cordierite, 2MgO•2Ah03•5Si02 (MAS), is a very attractive high-temperature ceramic material. In order to accelerate the process of sintering, 5.00 mass% Mo03 was added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill in time intervals from 0 to 160 minutes. In following, starting mixtures were sintered at 1300 °C for 2h. In order to determine the changes in the particle size distribution, the mechanically treated powders were characterized by a laser light-scattering particle size analyzer. The phase composition of the starting mixtures and sintered samples was analyzed by the X-ray diffraction method. Differential thermal analyses (DTA) and thermo-gravimetric (TG) analysis were used in order to determine characteristic temperatures. Kissinger's equation was employed to calculate apparent activation energies of various processes that occur within the system while heating. Based on the obtained DTA results, it was established that mechanical activation along with MoO3 additive, has influence on sintering temperature which was decreased for about 150 °C.",
publisher = "Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry",
journal = "3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts",
title = "Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA",
pages = "195-195",
url = "https://hdl.handle.net/21.15107/rcub_dais_761"
}

Obradović, N., Đorđević, N., Kosanović, D., Filipović, S., Marković, S., Mitrić, M.,& Pavlović, V. B.. (2015). Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA. in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts
Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry., 195-195.
https://hdl.handle.net/21.15107/rcub_dais_761

Obradović N, Đorđević N, Kosanović D, Filipović S, Marković S, Mitrić M, Pavlović VB. Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA. in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts. 2015;:195-195.
https://hdl.handle.net/21.15107/rcub_dais_761 .

Obradović, Nina, Đorđević, Nataša, Kosanović, Darko, Filipović, Suzana, Marković, Smilja, Mitrić, Miodrag, Pavlović, Vladimir B., "Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA" in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts (2015):195-195,
https://hdl.handle.net/21.15107/rcub_dais_761 .

TY  - CONF
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Pavlović, Vladimir B.
AU  - Peleš, Adriana
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Mitrović, Nebojša
PY  - 2014
UR  - http://dais.sanu.ac.rs/123456789/634
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5701
AB  - Conference abstract
PB  - Beograd : Društvo za ETRAN
C3  - Zbornik apstrakata i program 58. konferencije ETRAN-a, Vrnjačka Banja, 2-5. jun 2014.
T1  - Mehanohemijska sinteza magnezijum titanata
EP  - 46
SP  - 46
UR  - https://hdl.handle.net/21.15107/rcub_dais_634
ER  - 

@conference{
author = "Filipović, Suzana and Obradović, Nina and Pavlović, Vladimir B. and Peleš, Adriana and Marković, Smilja and Mitrić, Miodrag and Mitrović, Nebojša",
year = "2014",
abstract = "Conference abstract",
publisher = "Beograd : Društvo za ETRAN",
journal = "Zbornik apstrakata i program 58. konferencije ETRAN-a, Vrnjačka Banja, 2-5. jun 2014.",
title = "Mehanohemijska sinteza magnezijum titanata",
pages = "46-46",
url = "https://hdl.handle.net/21.15107/rcub_dais_634"
}

Filipović, S., Obradović, N., Pavlović, V. B., Peleš, A., Marković, S., Mitrić, M.,& Mitrović, N.. (2014). Mehanohemijska sinteza magnezijum titanata. in Zbornik apstrakata i program 58. konferencije ETRAN-a, Vrnjačka Banja, 2-5. jun 2014.
Beograd : Društvo za ETRAN., 46-46.
https://hdl.handle.net/21.15107/rcub_dais_634

Filipović S, Obradović N, Pavlović VB, Peleš A, Marković S, Mitrić M, Mitrović N. Mehanohemijska sinteza magnezijum titanata. in Zbornik apstrakata i program 58. konferencije ETRAN-a, Vrnjačka Banja, 2-5. jun 2014.. 2014;:46-46.
https://hdl.handle.net/21.15107/rcub_dais_634 .

Filipović, Suzana, Obradović, Nina, Pavlović, Vladimir B., Peleš, Adriana, Marković, Smilja, Mitrić, Miodrag, Mitrović, Nebojša, "Mehanohemijska sinteza magnezijum titanata" in Zbornik apstrakata i program 58. konferencije ETRAN-a, Vrnjačka Banja, 2-5. jun 2014. (2014):46-46,
https://hdl.handle.net/21.15107/rcub_dais_634 .

TY  - CONF
AU  - Obradović, Nina
AU  - Peleš, Adriana
AU  - Đorđević, Nataša
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/402
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5669
AB  - According to its low temperature thermal expansion coefficient, low dielectric constant, also good mechanical properties, cordierite, 2MgO×2Al2O3×5SiO2, represents a very attractive hightemperature ceramic material. In this study, cordierite was prepared by solid state reaction of the MgO, Al2O3 and SiO2 mixture. One of the components from the mixture, SiO2, was mechanically activated in a high energy ball mill during 5 and 10 minutes. The applied pressure before the sintering process was 2 t/cm2. Sintering process of mixtures containing non-activated and activated SiO2 powder was performed at 1350 oC for 4h in the air atmosphere. The phase composition of starting oxides and sintered samples was analyzed by the X-ray diffraction method. Particle size analysis was performed to investigate the differences between starting components. Scanning electron microscopy was done to analyze the microstructure of both components and sintered samples. This paper investigates the influence of one mechanically activated SiO2 component on the densities of green bodies as well as on the sintered samples, along with electrical properties of cordierite ceramics.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
T1  - Influence of one activated component on the sintering process of three phase system
EP  - 103
SP  - 103
UR  - https://hdl.handle.net/21.15107/rcub_dais_402
ER  - 

@conference{
author = "Obradović, Nina and Peleš, Adriana and Đorđević, Nataša and Marković, Smilja and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2013",
abstract = "According to its low temperature thermal expansion coefficient, low dielectric constant, also good mechanical properties, cordierite, 2MgO×2Al2O3×5SiO2, represents a very attractive hightemperature ceramic material. In this study, cordierite was prepared by solid state reaction of the MgO, Al2O3 and SiO2 mixture. One of the components from the mixture, SiO2, was mechanically activated in a high energy ball mill during 5 and 10 minutes. The applied pressure before the sintering process was 2 t/cm2. Sintering process of mixtures containing non-activated and activated SiO2 powder was performed at 1350 oC for 4h in the air atmosphere. The phase composition of starting oxides and sintered samples was analyzed by the X-ray diffraction method. Particle size analysis was performed to investigate the differences between starting components. Scanning electron microscopy was done to analyze the microstructure of both components and sintered samples. This paper investigates the influence of one mechanically activated SiO2 component on the densities of green bodies as well as on the sintered samples, along with electrical properties of cordierite ceramics.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts",
title = "Influence of one activated component on the sintering process of three phase system",
pages = "103-103",
url = "https://hdl.handle.net/21.15107/rcub_dais_402"
}

Obradović, N., Peleš, A., Đorđević, N., Marković, S., Mitrić, M.,& Pavlović, V. B.. (2013). Influence of one activated component on the sintering process of three phase system. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 103-103.
https://hdl.handle.net/21.15107/rcub_dais_402

Obradović N, Peleš A, Đorđević N, Marković S, Mitrić M, Pavlović VB. Influence of one activated component on the sintering process of three phase system. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts. 2013;:103-103.
https://hdl.handle.net/21.15107/rcub_dais_402 .

Obradović, Nina, Peleš, Adriana, Đorđević, Nataša, Marković, Smilja, Mitrić, Miodrag, Pavlović, Vladimir B., "Influence of one activated component on the sintering process of three phase system" in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts (2013):103-103,
https://hdl.handle.net/21.15107/rcub_dais_402 .

TY  - CONF
AU  - Kosanović, Darko
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
AU  - Maričić, Aleksa
AU  - Pavlović, Vladimir B.
AU  - Ristić, Momčilo M.
PY  - 2011
UR  - http://dais.sanu.ac.rs/123456789/630
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5700
AB  - Ba0.8Sr0.2TiO3 was prepared from the starting materials BaCO3, SrCO3 and TiO2 through solid state reaction. Mixtures of these oxides were mechanically activated using a high-energy ball mill at different time intervals from 0 to 120 minutes. X-ray diffraction was employed in order to determine the crystal structure and gave information about composition of phase variation. It was observed that after 40 minutes early synthesis of Ba0.8Sr0.2TiO3 phase occurred. Particle size distribution along with scanning electron microscopy gave very useful information about powder morphology.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts
T1  - Mechanochemical synthesis of Ba0.8Sr0.2TiO3
EP  - 134
SP  - 134
UR  - https://hdl.handle.net/21.15107/rcub_dais_630
ER  - 

@conference{
author = "Kosanović, Darko and Filipović, Suzana and Obradović, Nina and Mitrić, Miodrag and Marković, Smilja and Maričić, Aleksa and Pavlović, Vladimir B. and Ristić, Momčilo M.",
year = "2011",
abstract = "Ba0.8Sr0.2TiO3 was prepared from the starting materials BaCO3, SrCO3 and TiO2 through solid state reaction. Mixtures of these oxides were mechanically activated using a high-energy ball mill at different time intervals from 0 to 120 minutes. X-ray diffraction was employed in order to determine the crystal structure and gave information about composition of phase variation. It was observed that after 40 minutes early synthesis of Ba0.8Sr0.2TiO3 phase occurred. Particle size distribution along with scanning electron microscopy gave very useful information about powder morphology.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts",
title = "Mechanochemical synthesis of Ba0.8Sr0.2TiO3",
pages = "134-134",
url = "https://hdl.handle.net/21.15107/rcub_dais_630"
}

Kosanović, D., Filipović, S., Obradović, N., Mitrić, M., Marković, S., Maričić, A., Pavlović, V. B.,& Ristić, M. M.. (2011). Mechanochemical synthesis of Ba0.8Sr0.2TiO3. in The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 134-134.
https://hdl.handle.net/21.15107/rcub_dais_630

Kosanović D, Filipović S, Obradović N, Mitrić M, Marković S, Maričić A, Pavlović VB, Ristić MM. Mechanochemical synthesis of Ba0.8Sr0.2TiO3. in The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts. 2011;:134-134.
https://hdl.handle.net/21.15107/rcub_dais_630 .

Kosanović, Darko, Filipović, Suzana, Obradović, Nina, Mitrić, Miodrag, Marković, Smilja, Maričić, Aleksa, Pavlović, Vladimir B., Ristić, Momčilo M., "Mechanochemical synthesis of Ba0.8Sr0.2TiO3" in The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts (2011):134-134,
https://hdl.handle.net/21.15107/rcub_dais_630 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
AU  - Pavlović, Vladimir B.
PY  - 2011
UR  - http://dais.sanu.ac.rs/123456789/628
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5699
AB  - According to its exceptional electrical characteristics, such as low temperature expansion coefficient, low dielectric constant and good mechanical properties, cordierite, 2MgO⋅2Al2O3⋅5SiO2, represents very attractive ceramic material in the field of high temperatures. In order to accelerate the process of sintering, 1 mass% Bi2O3 has been added to starting mixtures. Liquid phase sintering caused by presence of bismuth-oxide leads to lowering temperature of cordierite formation. Mechanical activation of starting mixtures (0-56 minutes in vibro-mill) additionally leads to lowering sintering temperatures. Process of sintering was performed at 1200, 1300 and 1400 oC, for 2h. BET and PSA were employed in order to follow the changes in specific surface area and particle size of mechanically treated powders. Phase composition of starting powders and sintered materials was analyzed by X-ray diffraction method. Moreover, SEM analysis was used for analysis of powders morphology and sintered pallets microstructure.
PB  - Belgrade : Materials Research Society of Serbia
C3  - VII International Conference on Mechanochemistry and Mechanical Alloying INCOME 2011: Programme and the Book of Abstracts
T1  - Influence of mechanochemical activation on sintering of cordierite ceramics with the presence of Bi2O3 as a functional additive
EP  - 84
SP  - 84
UR  - https://hdl.handle.net/21.15107/rcub_dais_628
ER  - 

@conference{
author = "Đorđević, Nataša and Obradović, Nina and Filipović, Suzana and Kosanović, Darko and Mitrić, Miodrag and Marković, Smilja and Pavlović, Vladimir B.",
year = "2011",
abstract = "According to its exceptional electrical characteristics, such as low temperature expansion coefficient, low dielectric constant and good mechanical properties, cordierite, 2MgO⋅2Al2O3⋅5SiO2, represents very attractive ceramic material in the field of high temperatures. In order to accelerate the process of sintering, 1 mass% Bi2O3 has been added to starting mixtures. Liquid phase sintering caused by presence of bismuth-oxide leads to lowering temperature of cordierite formation. Mechanical activation of starting mixtures (0-56 minutes in vibro-mill) additionally leads to lowering sintering temperatures. Process of sintering was performed at 1200, 1300 and 1400 oC, for 2h. BET and PSA were employed in order to follow the changes in specific surface area and particle size of mechanically treated powders. Phase composition of starting powders and sintered materials was analyzed by X-ray diffraction method. Moreover, SEM analysis was used for analysis of powders morphology and sintered pallets microstructure.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "VII International Conference on Mechanochemistry and Mechanical Alloying INCOME 2011: Programme and the Book of Abstracts",
title = "Influence of mechanochemical activation on sintering of cordierite ceramics with the presence of Bi2O3 as a functional additive",
pages = "84-84",
url = "https://hdl.handle.net/21.15107/rcub_dais_628"
}

Đorđević, N., Obradović, N., Filipović, S., Kosanović, D., Mitrić, M., Marković, S.,& Pavlović, V. B.. (2011). Influence of mechanochemical activation on sintering of cordierite ceramics with the presence of Bi2O3 as a functional additive. in VII International Conference on Mechanochemistry and Mechanical Alloying INCOME 2011: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 84-84.
https://hdl.handle.net/21.15107/rcub_dais_628

Đorđević N, Obradović N, Filipović S, Kosanović D, Mitrić M, Marković S, Pavlović VB. Influence of mechanochemical activation on sintering of cordierite ceramics with the presence of Bi2O3 as a functional additive. in VII International Conference on Mechanochemistry and Mechanical Alloying INCOME 2011: Programme and the Book of Abstracts. 2011;:84-84.
https://hdl.handle.net/21.15107/rcub_dais_628 .

Đorđević, Nataša, Obradović, Nina, Filipović, Suzana, Kosanović, Darko, Mitrić, Miodrag, Marković, Smilja, Pavlović, Vladimir B., "Influence of mechanochemical activation on sintering of cordierite ceramics with the presence of Bi2O3 as a functional additive" in VII International Conference on Mechanochemistry and Mechanical Alloying INCOME 2011: Programme and the Book of Abstracts (2011):84-84,
https://hdl.handle.net/21.15107/rcub_dais_628 .