TY  - JOUR
AU  - Terzić, Anja
AU  - Obradović, Nina
AU  - Kosanović, Darko
AU  - Stojanović, Jovica
AU  - Djordjević, Antonije
AU  - Andrić, Ljubiša
AU  - Pavlović, Vladimir
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5028
AB  - Steatite, as ceramic with composition predominantly resting on magnesium silicate, was produced from economic resources - talc, aluminosilicate clays, and either BaCO3 or feldspar as flux. Titanium dioxide was a doping agent. Four steatite mixtures were mechanically activated in a planetary ball mill for 30, 45 or 60 min, prior to the thermal treatment. Two-step sintering with initial phase set at 1350 degrees C and holding period conducted at 1250 degrees C was applied to initiate diffusion and prevent grain growth. Thereby, a high density ceramic material with low-porous submicron structure was acquired. The effects of TiO2 addition on densification, microstructure, and dielectric characteristics of steatites were monitored. The thermal stability of green mixtures was tested by differential thermal and thermogravimetric analyses. Changes in crystallinity and mineral phase composition were observed by the X-ray diffraction technique. Microstructural visualization with spatial arrangements of individual chemical elements on surface of the sintered ceramics was acquired by scanning electron microscopy accompanied with EDS mapping. In order to test the possibility of employment of the obtained steatites in insulation materials, electrical measurements were conducted by recording variations of the dielectric constant and loss tangent as a function of alternations in the mix-design and the mechanical activation period.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Effects of mechanical-activation and TiO2 addition on the behavior of two-step sintered steatite ceramics
EP  - 3022
IS  - 3
SP  - 3013
VL  - 45
DO  - 10.1016/j.ceramint.2018.10.120
ER  - 

@article{
author = "Terzić, Anja and Obradović, Nina and Kosanović, Darko and Stojanović, Jovica and Djordjević, Antonije and Andrić, Ljubiša and Pavlović, Vladimir",
year = "2019",
abstract = "Steatite, as ceramic with composition predominantly resting on magnesium silicate, was produced from economic resources - talc, aluminosilicate clays, and either BaCO3 or feldspar as flux. Titanium dioxide was a doping agent. Four steatite mixtures were mechanically activated in a planetary ball mill for 30, 45 or 60 min, prior to the thermal treatment. Two-step sintering with initial phase set at 1350 degrees C and holding period conducted at 1250 degrees C was applied to initiate diffusion and prevent grain growth. Thereby, a high density ceramic material with low-porous submicron structure was acquired. The effects of TiO2 addition on densification, microstructure, and dielectric characteristics of steatites were monitored. The thermal stability of green mixtures was tested by differential thermal and thermogravimetric analyses. Changes in crystallinity and mineral phase composition were observed by the X-ray diffraction technique. Microstructural visualization with spatial arrangements of individual chemical elements on surface of the sintered ceramics was acquired by scanning electron microscopy accompanied with EDS mapping. In order to test the possibility of employment of the obtained steatites in insulation materials, electrical measurements were conducted by recording variations of the dielectric constant and loss tangent as a function of alternations in the mix-design and the mechanical activation period.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Effects of mechanical-activation and TiO2 addition on the behavior of two-step sintered steatite ceramics",
pages = "3022-3013",
number = "3",
volume = "45",
doi = "10.1016/j.ceramint.2018.10.120"
}

Terzić, A., Obradović, N., Kosanović, D., Stojanović, J., Djordjević, A., Andrić, L.,& Pavlović, V.. (2019). Effects of mechanical-activation and TiO2 addition on the behavior of two-step sintered steatite ceramics. in Ceramics International
Elsevier Sci Ltd, Oxford., 45(3), 3013-3022.
https://doi.org/10.1016/j.ceramint.2018.10.120

Terzić A, Obradović N, Kosanović D, Stojanović J, Djordjević A, Andrić L, Pavlović V. Effects of mechanical-activation and TiO2 addition on the behavior of two-step sintered steatite ceramics. in Ceramics International. 2019;45(3):3013-3022.
doi:10.1016/j.ceramint.2018.10.120 .

Terzić, Anja, Obradović, Nina, Kosanović, Darko, Stojanović, Jovica, Djordjević, Antonije, Andrić, Ljubiša, Pavlović, Vladimir, "Effects of mechanical-activation and TiO2 addition on the behavior of two-step sintered steatite ceramics" in Ceramics International, 45, no. 3 (2019):3013-3022,
https://doi.org/10.1016/j.ceramint.2018.10.120 . .

TY  - JOUR
AU  - Djordjević, Aleksandar
AU  - Sojić-Merkulov, Daniela
AU  - Lazarević, Marina
AU  - Borisev, Ivana
AU  - Medić, Igor
AU  - Pavlović, Vladimir
AU  - Miljević, Bojan
AU  - Abramović, Biljana
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4752
AB  - The surface modification of commercial TiO2 Hombikat (TiO2) using nanoparticles of fullerene C-60 with tetrahydrofuran (THF-nC(60)), as well as fullerenol C-60(OH)(24) nanoparticles (FNP) was investigated in this study. Characterization of THF-nC(60), FNP, TiO2, TiO2/THF-nC(60), and TiO2/FNP was studied by using DES, ELS, TEM, SEM, DRS and BET measurements and their photoactivity has been examined on the mesotrione degradation under simulated sunlight. It was found that FNP in self-assembled nanocomposite TiO2/FNP increased negatively charge, as well as catalytic surface of TiO2. In addition, TiO2/FNP exhibits a shift of band gap energy to lower values compared to TiO2 and TiO2/THF-nC(60). BET surface area has not showed significant differences among catalysts. Furthermore, it was found that the highest photoactivity was obtained for TiO2/FNP system. Besides, influence of different concentrations of electron acceptors (H2O2 and KBrO3), as well as scavengers on the kinetics of mesotrione removal in aqueous solution with/without TiO2 and FNP under simulated sunlight was investigated. Namely, addition of mentioned electron acceptors has resulted in higher mesotrione degradation efficiency compared to O-2 alone. Besides, in the first period substrate degradation probably takes place via hydroxyl radicals and after 60 min of irradiation the reaction mechanism proceeds mainly via holes. The most efficient system for mesotrione degradation and mineralization were TiO2/7 mM KBrO3 and TiO2/7 mM KBrO3/40 mu l FNP, respectively.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Chemosphere
T1  - Enhancement of nano titanium dioxide coatings by fullerene and polyhydroxy fullerene in the photocatalytic degradation of the herbicide mesotrione
EP  - 152
SP  - 145
VL  - 196
DO  - 10.1016/j.chemosphere.2017.12.160
ER  - 

@article{
author = "Djordjević, Aleksandar and Sojić-Merkulov, Daniela and Lazarević, Marina and Borisev, Ivana and Medić, Igor and Pavlović, Vladimir and Miljević, Bojan and Abramović, Biljana",
year = "2018",
abstract = "The surface modification of commercial TiO2 Hombikat (TiO2) using nanoparticles of fullerene C-60 with tetrahydrofuran (THF-nC(60)), as well as fullerenol C-60(OH)(24) nanoparticles (FNP) was investigated in this study. Characterization of THF-nC(60), FNP, TiO2, TiO2/THF-nC(60), and TiO2/FNP was studied by using DES, ELS, TEM, SEM, DRS and BET measurements and their photoactivity has been examined on the mesotrione degradation under simulated sunlight. It was found that FNP in self-assembled nanocomposite TiO2/FNP increased negatively charge, as well as catalytic surface of TiO2. In addition, TiO2/FNP exhibits a shift of band gap energy to lower values compared to TiO2 and TiO2/THF-nC(60). BET surface area has not showed significant differences among catalysts. Furthermore, it was found that the highest photoactivity was obtained for TiO2/FNP system. Besides, influence of different concentrations of electron acceptors (H2O2 and KBrO3), as well as scavengers on the kinetics of mesotrione removal in aqueous solution with/without TiO2 and FNP under simulated sunlight was investigated. Namely, addition of mentioned electron acceptors has resulted in higher mesotrione degradation efficiency compared to O-2 alone. Besides, in the first period substrate degradation probably takes place via hydroxyl radicals and after 60 min of irradiation the reaction mechanism proceeds mainly via holes. The most efficient system for mesotrione degradation and mineralization were TiO2/7 mM KBrO3 and TiO2/7 mM KBrO3/40 mu l FNP, respectively.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Chemosphere",
title = "Enhancement of nano titanium dioxide coatings by fullerene and polyhydroxy fullerene in the photocatalytic degradation of the herbicide mesotrione",
pages = "152-145",
volume = "196",
doi = "10.1016/j.chemosphere.2017.12.160"
}

Djordjević, A., Sojić-Merkulov, D., Lazarević, M., Borisev, I., Medić, I., Pavlović, V., Miljević, B.,& Abramović, B.. (2018). Enhancement of nano titanium dioxide coatings by fullerene and polyhydroxy fullerene in the photocatalytic degradation of the herbicide mesotrione. in Chemosphere
Pergamon-Elsevier Science Ltd, Oxford., 196, 145-152.
https://doi.org/10.1016/j.chemosphere.2017.12.160

Djordjević A, Sojić-Merkulov D, Lazarević M, Borisev I, Medić I, Pavlović V, Miljević B, Abramović B. Enhancement of nano titanium dioxide coatings by fullerene and polyhydroxy fullerene in the photocatalytic degradation of the herbicide mesotrione. in Chemosphere. 2018;196:145-152.
doi:10.1016/j.chemosphere.2017.12.160 .

Djordjević, Aleksandar, Sojić-Merkulov, Daniela, Lazarević, Marina, Borisev, Ivana, Medić, Igor, Pavlović, Vladimir, Miljević, Bojan, Abramović, Biljana, "Enhancement of nano titanium dioxide coatings by fullerene and polyhydroxy fullerene in the photocatalytic degradation of the herbicide mesotrione" in Chemosphere, 196 (2018):145-152,
https://doi.org/10.1016/j.chemosphere.2017.12.160 . .

TY  - DATA
AU  - Đorđević, Aleksandar
AU  - Šojić Merkulov, Daniela
AU  - Lazarević, Marina
AU  - Borišev, Ivana
AU  - Medić, Igor
AU  - Pavlović, Vladimir B.
AU  - Miljević, Bojan
AU  - Abramović, Biljana
PY  - 2018
UR  - https://ars.els-cdn.com/content/image/1-s2.0-S0045653517321380-mmc1.doc
UR  - http://dais.sanu.ac.rs/123456789/3787
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5728
AB  - Chemicals, solutions and catalysts; Nanoparticles characterization; Synthesis of THF-nC60, FNP, TiO2/THF-nC60 and TiO2/FNP nanoparticles; Characterization of THF-nC60, FNP, TiO2, TiO2/THF-nC60, and TiO2/FNP nanoparticles; Evaluation of mineralization;
T2  - Chemosphere
T1  - Supplementary material: Djordjevic, A., Šojić Merkulov, D., Lazarević, M., Borišev, I., Medić, I., Pavlović, V., Miljević, B., Abramović, B., 2018. Enhancement of nano titanium dioxide coatings by fullerene and polyhydroxy fullerene in the photocatalytic degradation of the herbicide mesotrione. Chemosphere 196, 145–152. https://doi.org/10.1016/j.chemosphere.2017.12.160
VL  - 196
UR  - https://hdl.handle.net/21.15107/rcub_dais_3787
ER  - 

@misc{
author = "Đorđević, Aleksandar and Šojić Merkulov, Daniela and Lazarević, Marina and Borišev, Ivana and Medić, Igor and Pavlović, Vladimir B. and Miljević, Bojan and Abramović, Biljana",
year = "2018",
abstract = "Chemicals, solutions and catalysts; Nanoparticles characterization; Synthesis of THF-nC60, FNP, TiO2/THF-nC60 and TiO2/FNP nanoparticles; Characterization of THF-nC60, FNP, TiO2, TiO2/THF-nC60, and TiO2/FNP nanoparticles; Evaluation of mineralization;",
journal = "Chemosphere",
title = "Supplementary material: Djordjevic, A., Šojić Merkulov, D., Lazarević, M., Borišev, I., Medić, I., Pavlović, V., Miljević, B., Abramović, B., 2018. Enhancement of nano titanium dioxide coatings by fullerene and polyhydroxy fullerene in the photocatalytic degradation of the herbicide mesotrione. Chemosphere 196, 145–152. https://doi.org/10.1016/j.chemosphere.2017.12.160",
volume = "196",
url = "https://hdl.handle.net/21.15107/rcub_dais_3787"
}

Đorđević, A., Šojić Merkulov, D., Lazarević, M., Borišev, I., Medić, I., Pavlović, V. B., Miljević, B.,& Abramović, B.. (2018). Supplementary material: Djordjevic, A., Šojić Merkulov, D., Lazarević, M., Borišev, I., Medić, I., Pavlović, V., Miljević, B., Abramović, B., 2018. Enhancement of nano titanium dioxide coatings by fullerene and polyhydroxy fullerene in the photocatalytic degradation of the herbicide mesotrione. Chemosphere 196, 145–152. https://doi.org/10.1016/j.chemosphere.2017.12.160. in Chemosphere, 196.
https://hdl.handle.net/21.15107/rcub_dais_3787

Đorđević A, Šojić Merkulov D, Lazarević M, Borišev I, Medić I, Pavlović VB, Miljević B, Abramović B. Supplementary material: Djordjevic, A., Šojić Merkulov, D., Lazarević, M., Borišev, I., Medić, I., Pavlović, V., Miljević, B., Abramović, B., 2018. Enhancement of nano titanium dioxide coatings by fullerene and polyhydroxy fullerene in the photocatalytic degradation of the herbicide mesotrione. Chemosphere 196, 145–152. https://doi.org/10.1016/j.chemosphere.2017.12.160. in Chemosphere. 2018;196.
https://hdl.handle.net/21.15107/rcub_dais_3787 .

Đorđević, Aleksandar, Šojić Merkulov, Daniela, Lazarević, Marina, Borišev, Ivana, Medić, Igor, Pavlović, Vladimir B., Miljević, Bojan, Abramović, Biljana, "Supplementary material: Djordjevic, A., Šojić Merkulov, D., Lazarević, M., Borišev, I., Medić, I., Pavlović, V., Miljević, B., Abramović, B., 2018. Enhancement of nano titanium dioxide coatings by fullerene and polyhydroxy fullerene in the photocatalytic degradation of the herbicide mesotrione. Chemosphere 196, 145–152. https://doi.org/10.1016/j.chemosphere.2017.12.160" in Chemosphere, 196 (2018),
https://hdl.handle.net/21.15107/rcub_dais_3787 .

TY  - JOUR
AU  - Terzić, Anja
AU  - Obradović, Nina
AU  - Pouchly, Vaclav
AU  - Stojanović, Jovica
AU  - Maca, Karel
AU  - Pavlović, Vladimir
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4704
AB  - The influence of the sintering method on the mineral phase transformations and development of the crystalline microstructure of steatite ceramics was investigated. The steatite samples were fabricated from talc and bentonite as low-cost raw materials. Feldspar and barium carbonate, as fluxing agents, were altered in the steatite composition. Dilatometric analysis was applied in the monitoring of the dimensional changes and thereby densification of steatite during the traditional sintering (TS) procedure up to 1200 degrees C. Spark plasma sintering (SPS) method was used under the following sintering conditions: 100 degrees C/min heating rate, uniaxial pressure of 50 MPa; sintering temperature 800 degrees C/1 min or 1000 degrees C/2 min. Crystallinity changes and mineral phase transition during sintering were observed by X-ray diffraction technique. Microstructural visualization of the samples and the spatial arrangements of individual chemical elements were achieved via scanning electron microscopy equipped with the EDS mapping. It was found that SPS sintering facilitated all microstructural changes during high temperature treatment and shifted them to lower temperatures. SPS treatment conducted at 1000 degrees C resulted in maximum densification of the steatite powder compacts and the formation stabilized protoenstatite structure.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Microstructure and Phase Composition Of Steatite Ceramics Sintered by Traditional and Spark Plasma Sintering
EP  - 312
IS  - 3
SP  - 299
VL  - 50
DO  - 10.2298/SOS1803299T
ER  - 

@article{
author = "Terzić, Anja and Obradović, Nina and Pouchly, Vaclav and Stojanović, Jovica and Maca, Karel and Pavlović, Vladimir",
year = "2018",
abstract = "The influence of the sintering method on the mineral phase transformations and development of the crystalline microstructure of steatite ceramics was investigated. The steatite samples were fabricated from talc and bentonite as low-cost raw materials. Feldspar and barium carbonate, as fluxing agents, were altered in the steatite composition. Dilatometric analysis was applied in the monitoring of the dimensional changes and thereby densification of steatite during the traditional sintering (TS) procedure up to 1200 degrees C. Spark plasma sintering (SPS) method was used under the following sintering conditions: 100 degrees C/min heating rate, uniaxial pressure of 50 MPa; sintering temperature 800 degrees C/1 min or 1000 degrees C/2 min. Crystallinity changes and mineral phase transition during sintering were observed by X-ray diffraction technique. Microstructural visualization of the samples and the spatial arrangements of individual chemical elements were achieved via scanning electron microscopy equipped with the EDS mapping. It was found that SPS sintering facilitated all microstructural changes during high temperature treatment and shifted them to lower temperatures. SPS treatment conducted at 1000 degrees C resulted in maximum densification of the steatite powder compacts and the formation stabilized protoenstatite structure.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Microstructure and Phase Composition Of Steatite Ceramics Sintered by Traditional and Spark Plasma Sintering",
pages = "312-299",
number = "3",
volume = "50",
doi = "10.2298/SOS1803299T"
}

Terzić, A., Obradović, N., Pouchly, V., Stojanović, J., Maca, K.,& Pavlović, V.. (2018). Microstructure and Phase Composition Of Steatite Ceramics Sintered by Traditional and Spark Plasma Sintering. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 50(3), 299-312.
https://doi.org/10.2298/SOS1803299T

Terzić A, Obradović N, Pouchly V, Stojanović J, Maca K, Pavlović V. Microstructure and Phase Composition Of Steatite Ceramics Sintered by Traditional and Spark Plasma Sintering. in Science of Sintering. 2018;50(3):299-312.
doi:10.2298/SOS1803299T .

Terzić, Anja, Obradović, Nina, Pouchly, Vaclav, Stojanović, Jovica, Maca, Karel, Pavlović, Vladimir, "Microstructure and Phase Composition Of Steatite Ceramics Sintered by Traditional and Spark Plasma Sintering" in Science of Sintering, 50, no. 3 (2018):299-312,
https://doi.org/10.2298/SOS1803299T . .

TY  - JOUR
AU  - Terzić, Anja
AU  - Pezo, Lato
AU  - Andrić, Ljubiša
AU  - Pavlović, Vladimir
AU  - Mitić, Vojislav V.
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4373
AB  - The properties of seven montmorillonite-rich bentonites of different geological origin were investigated prior and subsequent to mechano-chemical processing in an ultra-centrifugal mill. The objective of the experiment was altering the bentonite types and activation parameters in order to determine the optimal milling conditions that produce material which is physico-mechanically and microstructurally applicable as a binder replacement and sorbent in the construction composites. The efficiency of bentonite activation was assessed by chemometrics and Artificial neural networks mathematical modeling. Principal component analysis and analysis of variance were used in the observation of the influence of input variables (bentonite chemical composition) and process parameters (milling duration, rotor velocity) on the product characteristics: density, specific surface area, grain size and distribution, cation exchange capacity, melting point, compressive strength, shrinkage and porosity. When the ANN models for the observed responses, related to predicted bentonite characteristics and quality, were compared to experimental results, they correctly predicted the responses. The processed data also adequately fitted to the regression second order polynomial models. The SOP models, which showed r(2) values from 0.357 to 0.948, and were able to predict the observed responses in a wide range of processing parameters, while ANN models performed high prediction accuracy (0.776-0.901) and can be considered as precise for response variables prediction. The combination of the conducted mathematical analyses showed that that increase/decrease in output values was stabilized after 30 min of activation. Mathematically attained interpretations were correlated with the results of the instrumental analyses (XRD, DTA/TG, SEM) to confirm the adoption of B6 bentonite as a preferable type and 30 min as an optimal milling time for acquiring quality of clay powder that will be used in structural and thermal applications.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling
EP  - 2562
IS  - 2
SP  - 2549
VL  - 43
DO  - 10.1016/j.ceramint.2016.11.058
ER  - 

@article{
author = "Terzić, Anja and Pezo, Lato and Andrić, Ljubiša and Pavlović, Vladimir and Mitić, Vojislav V.",
year = "2017",
abstract = "The properties of seven montmorillonite-rich bentonites of different geological origin were investigated prior and subsequent to mechano-chemical processing in an ultra-centrifugal mill. The objective of the experiment was altering the bentonite types and activation parameters in order to determine the optimal milling conditions that produce material which is physico-mechanically and microstructurally applicable as a binder replacement and sorbent in the construction composites. The efficiency of bentonite activation was assessed by chemometrics and Artificial neural networks mathematical modeling. Principal component analysis and analysis of variance were used in the observation of the influence of input variables (bentonite chemical composition) and process parameters (milling duration, rotor velocity) on the product characteristics: density, specific surface area, grain size and distribution, cation exchange capacity, melting point, compressive strength, shrinkage and porosity. When the ANN models for the observed responses, related to predicted bentonite characteristics and quality, were compared to experimental results, they correctly predicted the responses. The processed data also adequately fitted to the regression second order polynomial models. The SOP models, which showed r(2) values from 0.357 to 0.948, and were able to predict the observed responses in a wide range of processing parameters, while ANN models performed high prediction accuracy (0.776-0.901) and can be considered as precise for response variables prediction. The combination of the conducted mathematical analyses showed that that increase/decrease in output values was stabilized after 30 min of activation. Mathematically attained interpretations were correlated with the results of the instrumental analyses (XRD, DTA/TG, SEM) to confirm the adoption of B6 bentonite as a preferable type and 30 min as an optimal milling time for acquiring quality of clay powder that will be used in structural and thermal applications.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling",
pages = "2562-2549",
number = "2",
volume = "43",
doi = "10.1016/j.ceramint.2016.11.058"
}

Terzić, A., Pezo, L., Andrić, L., Pavlović, V.,& Mitić, V. V.. (2017). Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling. in Ceramics International
Elsevier Sci Ltd, Oxford., 43(2), 2549-2562.
https://doi.org/10.1016/j.ceramint.2016.11.058

Terzić A, Pezo L, Andrić L, Pavlović V, Mitić VV. Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling. in Ceramics International. 2017;43(2):2549-2562.
doi:10.1016/j.ceramint.2016.11.058 .

Terzić, Anja, Pezo, Lato, Andrić, Ljubiša, Pavlović, Vladimir, Mitić, Vojislav V., "Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling" in Ceramics International, 43, no. 2 (2017):2549-2562,
https://doi.org/10.1016/j.ceramint.2016.11.058 . .

TY  - JOUR
AU  - Terzić, Anja
AU  - Djordjević, Nataša
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
AU  - Djordjević, Katarina
AU  - Pavlović, Vladimir
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4335
AB  - Due to pozzolanic characteristics, fly ash is commonly used as a cement replacement in construction composites. Addition of natural clays with sorption ability (i.e. zeolite and bentonite) in to the fly ash based construction materials is of both scientific and industrial interest. Namely, due to the application of sorptive clay minerals, it is possible to immobilize toxic heavy metals from the composite structure. The thermal compatibility of fly ash and zeolite, as well as fly ash and bentonite, within the composite was observed during sintering procedure. The starting components were used in 1: 1 ratio and they were applied without additional mechanical treatment. The used compaction pressure for the tablets was 2 t.cm(-2). The sintering process was conducted at 1000 degrees C and 1200 degrees C for two hours in the air atmosphere. The mineralogical phase composition of the non-treated and sintered samples was analyzed using X-ray diffraction method. Scanning electron microscopy was applied in the analysis of the microstructure of starting and sintered samples. The thermal behavior was observed via DTA method. The influence of temperature on the properties of fly ash-zeolite and fly ash-bentonite composites was investigated.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Sintering of Fly Ash Based Composites with Zeolite and Bentonite Addition for Application in Construction Materials
EP  - 37
IS  - 1
SP  - 23
VL  - 49
DO  - 10.2298/SOS1701023T
ER  - 

@article{
author = "Terzić, Anja and Djordjević, Nataša and Mitrić, Miodrag and Marković, Smilja and Djordjević, Katarina and Pavlović, Vladimir",
year = "2017",
abstract = "Due to pozzolanic characteristics, fly ash is commonly used as a cement replacement in construction composites. Addition of natural clays with sorption ability (i.e. zeolite and bentonite) in to the fly ash based construction materials is of both scientific and industrial interest. Namely, due to the application of sorptive clay minerals, it is possible to immobilize toxic heavy metals from the composite structure. The thermal compatibility of fly ash and zeolite, as well as fly ash and bentonite, within the composite was observed during sintering procedure. The starting components were used in 1: 1 ratio and they were applied without additional mechanical treatment. The used compaction pressure for the tablets was 2 t.cm(-2). The sintering process was conducted at 1000 degrees C and 1200 degrees C for two hours in the air atmosphere. The mineralogical phase composition of the non-treated and sintered samples was analyzed using X-ray diffraction method. Scanning electron microscopy was applied in the analysis of the microstructure of starting and sintered samples. The thermal behavior was observed via DTA method. The influence of temperature on the properties of fly ash-zeolite and fly ash-bentonite composites was investigated.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Sintering of Fly Ash Based Composites with Zeolite and Bentonite Addition for Application in Construction Materials",
pages = "37-23",
number = "1",
volume = "49",
doi = "10.2298/SOS1701023T"
}

Terzić, A., Djordjević, N., Mitrić, M., Marković, S., Djordjević, K.,& Pavlović, V.. (2017). Sintering of Fly Ash Based Composites with Zeolite and Bentonite Addition for Application in Construction Materials. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 49(1), 23-37.
https://doi.org/10.2298/SOS1701023T

Terzić A, Djordjević N, Mitrić M, Marković S, Djordjević K, Pavlović V. Sintering of Fly Ash Based Composites with Zeolite and Bentonite Addition for Application in Construction Materials. in Science of Sintering. 2017;49(1):23-37.
doi:10.2298/SOS1701023T .

Terzić, Anja, Djordjević, Nataša, Mitrić, Miodrag, Marković, Smilja, Djordjević, Katarina, Pavlović, Vladimir, "Sintering of Fly Ash Based Composites with Zeolite and Bentonite Addition for Application in Construction Materials" in Science of Sintering, 49, no. 1 (2017):23-37,
https://doi.org/10.2298/SOS1701023T . .

TY  - JOUR
AU  - Terzić, Anja
AU  - Obradović, Nina
AU  - Stojanović, Jovica
AU  - Pavlović, Vladimir
AU  - Andrić, Ljubiša
AU  - Olcan, Dragan
AU  - Djordjević, Antonije
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4491
AB  - The focus of the study was on providing insights into interconnections between sintering and development of the crystalline microstructure, and consequently variations in dielectric behavior of four steatites fabricated from a low-cost raw material, i.e. talc. The changes, induced by the alternations of the binders (bentonite, kaolin clay) and fluxing agents (BaCO3, feldspar), were monitored in the temperature range 1000 degrees to 1250 degrees C in which complete densification and re-crystallization of the investigated structures were accomplished. The critical points in the synthesis of steatite materials were assessed by instrumental analyses. Crystallinity changes and mineral phase transition during sintering were monitored by X-ray diffraction technique. Microstructural visualization of the samples and the spatial arrangements of individual chemical elements were achieved via scanning electron microscopy accompanied with EDS mapping. The thermal stability was observed on the green mixtures using differential thermal and thermo gravimetric analyses. Electrical measurements recorded variations of the dielectric constant (epsilon(r)) and loss tangent (tan delta) as a function of the sintering temperature. The investigation highlighted critical design points, as well as the optimal combinations of the raw materials for production of the steatite ceramics for advanced electrical engineering applications.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials
EP  - 13275
IS  - 16
SP  - 13264
VL  - 43
DO  - 10.1016/j.ceramint.2017.07.024
ER  - 

@article{
author = "Terzić, Anja and Obradović, Nina and Stojanović, Jovica and Pavlović, Vladimir and Andrić, Ljubiša and Olcan, Dragan and Djordjević, Antonije",
year = "2017",
abstract = "The focus of the study was on providing insights into interconnections between sintering and development of the crystalline microstructure, and consequently variations in dielectric behavior of four steatites fabricated from a low-cost raw material, i.e. talc. The changes, induced by the alternations of the binders (bentonite, kaolin clay) and fluxing agents (BaCO3, feldspar), were monitored in the temperature range 1000 degrees to 1250 degrees C in which complete densification and re-crystallization of the investigated structures were accomplished. The critical points in the synthesis of steatite materials were assessed by instrumental analyses. Crystallinity changes and mineral phase transition during sintering were monitored by X-ray diffraction technique. Microstructural visualization of the samples and the spatial arrangements of individual chemical elements were achieved via scanning electron microscopy accompanied with EDS mapping. The thermal stability was observed on the green mixtures using differential thermal and thermo gravimetric analyses. Electrical measurements recorded variations of the dielectric constant (epsilon(r)) and loss tangent (tan delta) as a function of the sintering temperature. The investigation highlighted critical design points, as well as the optimal combinations of the raw materials for production of the steatite ceramics for advanced electrical engineering applications.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials",
pages = "13275-13264",
number = "16",
volume = "43",
doi = "10.1016/j.ceramint.2017.07.024"
}

Terzić, A., Obradović, N., Stojanović, J., Pavlović, V., Andrić, L., Olcan, D.,& Djordjević, A.. (2017). Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials. in Ceramics International
Elsevier Sci Ltd, Oxford., 43(16), 13264-13275.
https://doi.org/10.1016/j.ceramint.2017.07.024

Terzić A, Obradović N, Stojanović J, Pavlović V, Andrić L, Olcan D, Djordjević A. Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials. in Ceramics International. 2017;43(16):13264-13275.
doi:10.1016/j.ceramint.2017.07.024 .

Terzić, Anja, Obradović, Nina, Stojanović, Jovica, Pavlović, Vladimir, Andrić, Ljubiša, Olcan, Dragan, Djordjević, Antonije, "Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials" in Ceramics International, 43, no. 16 (2017):13264-13275,
https://doi.org/10.1016/j.ceramint.2017.07.024 . .

TY  - JOUR
AU  - Terzić, Anja
AU  - Radojević, Zagorka
AU  - Pavlović, Ljubica
AU  - Pavlović, Vladimir
AU  - Mitić, Vojislav
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3770
AB  - In this study, the feasibility of using fly ash to manufacture high-temperature mortars was investigated. The investigation was set to define preliminary characteristics of new types of mortars based on ordinary and/or refractory cement with fly ash addition, and to establish mutual correlation between thermally induced changes of mineral phases, microstructure, and final performances of the mortars. New mortars, made up of 21% cement (PC-CEM I 42.5R/HAC-Secar 70/71), 70% river sand, and 9% fly ash, were chemically, physically, and mechanically characterized to determine possibilities of fly ash re-utilization for high-temperature purposes. The fly ash samples, which originated from four different power plants, were mechanically activated. Mortars were heat-treated up to 1300 degrees C in a laboratory tunnel furnace with retention time 2 h. Thermal stability of crystalline phases were studied by differential thermal analysis (DTA); thermally induced changes in mineral phase composition were analyzed by XRD; and microstructure were investigated by scanning electron microscopy. Correlated results of DTA, XRD, and SEM analyses indicated initiation of sintering processes at approximately 1300 degrees C and formation of thermally stable minerals (rankinite, gehlenite, anorthite, cristobalite). The investigation highlights a sustainable approach of using fly ash in developing ecofriendly mortars for high-temperature application.
PB  - Wiley, Hoboken
T2  - International Journal of Applied Ceramic Technology
T1  - Novel Utilization of Fly Ash for High-Temperature Mortars: Phase Composition, Microstructure and Performances Correlation
EP  - 146
IS  - 1
SP  - 133
VL  - 12
DO  - 10.1111/ijac.12135
ER  - 

@article{
author = "Terzić, Anja and Radojević, Zagorka and Pavlović, Ljubica and Pavlović, Vladimir and Mitić, Vojislav",
year = "2015",
abstract = "In this study, the feasibility of using fly ash to manufacture high-temperature mortars was investigated. The investigation was set to define preliminary characteristics of new types of mortars based on ordinary and/or refractory cement with fly ash addition, and to establish mutual correlation between thermally induced changes of mineral phases, microstructure, and final performances of the mortars. New mortars, made up of 21% cement (PC-CEM I 42.5R/HAC-Secar 70/71), 70% river sand, and 9% fly ash, were chemically, physically, and mechanically characterized to determine possibilities of fly ash re-utilization for high-temperature purposes. The fly ash samples, which originated from four different power plants, were mechanically activated. Mortars were heat-treated up to 1300 degrees C in a laboratory tunnel furnace with retention time 2 h. Thermal stability of crystalline phases were studied by differential thermal analysis (DTA); thermally induced changes in mineral phase composition were analyzed by XRD; and microstructure were investigated by scanning electron microscopy. Correlated results of DTA, XRD, and SEM analyses indicated initiation of sintering processes at approximately 1300 degrees C and formation of thermally stable minerals (rankinite, gehlenite, anorthite, cristobalite). The investigation highlights a sustainable approach of using fly ash in developing ecofriendly mortars for high-temperature application.",
publisher = "Wiley, Hoboken",
journal = "International Journal of Applied Ceramic Technology",
title = "Novel Utilization of Fly Ash for High-Temperature Mortars: Phase Composition, Microstructure and Performances Correlation",
pages = "146-133",
number = "1",
volume = "12",
doi = "10.1111/ijac.12135"
}

Terzić, A., Radojević, Z., Pavlović, L., Pavlović, V.,& Mitić, V.. (2015). Novel Utilization of Fly Ash for High-Temperature Mortars: Phase Composition, Microstructure and Performances Correlation. in International Journal of Applied Ceramic Technology
Wiley, Hoboken., 12(1), 133-146.
https://doi.org/10.1111/ijac.12135

Terzić A, Radojević Z, Pavlović L, Pavlović V, Mitić V. Novel Utilization of Fly Ash for High-Temperature Mortars: Phase Composition, Microstructure and Performances Correlation. in International Journal of Applied Ceramic Technology. 2015;12(1):133-146.
doi:10.1111/ijac.12135 .

Terzić, Anja, Radojević, Zagorka, Pavlović, Ljubica, Pavlović, Vladimir, Mitić, Vojislav, "Novel Utilization of Fly Ash for High-Temperature Mortars: Phase Composition, Microstructure and Performances Correlation" in International Journal of Applied Ceramic Technology, 12, no. 1 (2015):133-146,
https://doi.org/10.1111/ijac.12135 . .

TY  - JOUR
AU  - Terzić, Anja
AU  - Obradović, Nina
AU  - Andrić, Ljubiša
AU  - Stojanović, Jovica
AU  - Pavlović, Vladimir
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3772
AB  - The effects that the fly ash addition has on the behavior of thermally resistant corundum concrete were discussed. Experimental program implied production of two refractory composites: "referent" concrete from 20 % of high-aluminate cement and 80 % of corundum aggregate, "recycled" concrete from 10 % of high-aluminate cement, 20 % of lignite coal ash, and 70 % of corundum aggregate. The fly ash was mechanically activated by a vibratory disk mill. In the concrete matrix, the ash had a role of cement partial replacement and microfiller. The mechanical and thermal properties of the concretes were studied at temperatures ranging from ambient to 1,400 A degrees C as adopted maximum. Mechanisms of thermally induced processes were observed by differential thermal analysis at 10, 20, and 30 A degrees C min(-1) heating rates. Referent and recycled concretes showed differences in calculated activation energies. The variations in refractory concretes performances were discussed with support of scanning electron microscope imagining and X-ray diffraction results. The recycled ash concrete exhibited properties that met the requirements for the castables, which proves it suitable for use in severe conditions at high temperature and highlights the reusing principle and possibility of cleaner and economically sustainable production.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Investigation of thermally induced processes in corundum refractory concretes with addition of fly ash
EP  - 1352
IS  - 2
SP  - 1339
VL  - 119
DO  - 10.1007/s10973-014-4230-4
ER  - 

@article{
author = "Terzić, Anja and Obradović, Nina and Andrić, Ljubiša and Stojanović, Jovica and Pavlović, Vladimir",
year = "2015",
abstract = "The effects that the fly ash addition has on the behavior of thermally resistant corundum concrete were discussed. Experimental program implied production of two refractory composites: "referent" concrete from 20 % of high-aluminate cement and 80 % of corundum aggregate, "recycled" concrete from 10 % of high-aluminate cement, 20 % of lignite coal ash, and 70 % of corundum aggregate. The fly ash was mechanically activated by a vibratory disk mill. In the concrete matrix, the ash had a role of cement partial replacement and microfiller. The mechanical and thermal properties of the concretes were studied at temperatures ranging from ambient to 1,400 A degrees C as adopted maximum. Mechanisms of thermally induced processes were observed by differential thermal analysis at 10, 20, and 30 A degrees C min(-1) heating rates. Referent and recycled concretes showed differences in calculated activation energies. The variations in refractory concretes performances were discussed with support of scanning electron microscope imagining and X-ray diffraction results. The recycled ash concrete exhibited properties that met the requirements for the castables, which proves it suitable for use in severe conditions at high temperature and highlights the reusing principle and possibility of cleaner and economically sustainable production.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Investigation of thermally induced processes in corundum refractory concretes with addition of fly ash",
pages = "1352-1339",
number = "2",
volume = "119",
doi = "10.1007/s10973-014-4230-4"
}

Terzić, A., Obradović, N., Andrić, L., Stojanović, J.,& Pavlović, V.. (2015). Investigation of thermally induced processes in corundum refractory concretes with addition of fly ash. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 119(2), 1339-1352.
https://doi.org/10.1007/s10973-014-4230-4

Terzić A, Obradović N, Andrić L, Stojanović J, Pavlović V. Investigation of thermally induced processes in corundum refractory concretes with addition of fly ash. in Journal of Thermal Analysis and Calorimetry. 2015;119(2):1339-1352.
doi:10.1007/s10973-014-4230-4 .

Terzić, Anja, Obradović, Nina, Andrić, Ljubiša, Stojanović, Jovica, Pavlović, Vladimir, "Investigation of thermally induced processes in corundum refractory concretes with addition of fly ash" in Journal of Thermal Analysis and Calorimetry, 119, no. 2 (2015):1339-1352,
https://doi.org/10.1007/s10973-014-4230-4 . .

TY  - JOUR
AU  - Obradović, N.
AU  - Terzić, Anja
AU  - Pavlović, Ljubica
AU  - Filipović, Suzana
AU  - Pavlović, Vladimir
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3006
AB  - The base mix refractory concrete is corundum-based, containing corundum as refractory aggregate and CAC as hydraulic binder, with a spinel as an additive. The authors investigated the dehydration reactions which occur from the moment when water is added (at the beginning of components mixing), to the moment when installed refractory concrete lining is put into the service. Sintering process kinetic of low-cement content refractory concrete was investigated by means of differential thermal analysis at four different heating rates (5, 10, 20, and 30 A degrees C/min). Thus, temperature was increased from 20 to 1100 A degrees C. It was noticed that first dehydration step occurs at lower temperatures, indicating at a desorption of physically adsorbed and interlayer water molecules. Second dehydration step, at higher temperatures is due to dehydroxylation of the lattices and decomposition of the interlayer anions.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Dehydration investigations of a refractory concrete using DTA method
EP  - 41
IS  - 1
SP  - 37
VL  - 110
DO  - 10.1007/s10973-011-1880-3
ER  - 

@article{
author = "Obradović, N. and Terzić, Anja and Pavlović, Ljubica and Filipović, Suzana and Pavlović, Vladimir",
year = "2012",
abstract = "The base mix refractory concrete is corundum-based, containing corundum as refractory aggregate and CAC as hydraulic binder, with a spinel as an additive. The authors investigated the dehydration reactions which occur from the moment when water is added (at the beginning of components mixing), to the moment when installed refractory concrete lining is put into the service. Sintering process kinetic of low-cement content refractory concrete was investigated by means of differential thermal analysis at four different heating rates (5, 10, 20, and 30 A degrees C/min). Thus, temperature was increased from 20 to 1100 A degrees C. It was noticed that first dehydration step occurs at lower temperatures, indicating at a desorption of physically adsorbed and interlayer water molecules. Second dehydration step, at higher temperatures is due to dehydroxylation of the lattices and decomposition of the interlayer anions.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Dehydration investigations of a refractory concrete using DTA method",
pages = "41-37",
number = "1",
volume = "110",
doi = "10.1007/s10973-011-1880-3"
}

Obradović, N., Terzić, A., Pavlović, L., Filipović, S.,& Pavlović, V.. (2012). Dehydration investigations of a refractory concrete using DTA method. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 110(1), 37-41.
https://doi.org/10.1007/s10973-011-1880-3

Obradović N, Terzić A, Pavlović L, Filipović S, Pavlović V. Dehydration investigations of a refractory concrete using DTA method. in Journal of Thermal Analysis and Calorimetry. 2012;110(1):37-41.
doi:10.1007/s10973-011-1880-3 .

Obradović, N., Terzić, Anja, Pavlović, Ljubica, Filipović, Suzana, Pavlović, Vladimir, "Dehydration investigations of a refractory concrete using DTA method" in Journal of Thermal Analysis and Calorimetry, 110, no. 1 (2012):37-41,
https://doi.org/10.1007/s10973-011-1880-3 . .