TY  - JOUR
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Filipović, Suzana
AU  - Marković, Smilja
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir
PY  - 2016
UR  - https://ritnms.itnms.ac.rs/handle/123456789/410
AB  - Since cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2) (MAS), is a very useful high-temperature ceramic material, it is important to decrease its sintering temperature. In order to accelerate the process of sintering, 5.00 mass% MoO3 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 min. After the activation, starting mixtures were sintered at 1300 A degrees C for 2 h. In order to determine the impact of mechanical activation on particle size distribution and powders morphology, the mechanically treated powders were characterized by a laser light-scattering particle size analyzer and scanning electron microscopy. The phase composition of the starting mixtures and sintered samples was analyzed by the X-ray diffraction method. In order to determine temperature intervals of chemical reactions and phase transitions, differential thermal analyses (DTA) and thermo-gravimetric analysis were used. Kissinger's equation was employed to calculate apparent activation energies of various processes that occur within the system during 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 more than 100 A degrees C, comparing to the literature data.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA
EP  - 673
IS  - 2
SP  - 667
VL  - 124
DO  - 10.1007/s10973-015-5132-9
UR  - conv_757
ER  - 

@article{
author = "Obradović, Nina and Đorđević, Nataša and Filipović, Suzana and Marković, Smilja and Kosanović, Darko and Mitrić, Miodrag and Pavlović, Vladimir",
year = "2016",
abstract = "Since cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2) (MAS), is a very useful high-temperature ceramic material, it is important to decrease its sintering temperature. In order to accelerate the process of sintering, 5.00 mass% MoO3 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 min. After the activation, starting mixtures were sintered at 1300 A degrees C for 2 h. In order to determine the impact of mechanical activation on particle size distribution and powders morphology, the mechanically treated powders were characterized by a laser light-scattering particle size analyzer and scanning electron microscopy. The phase composition of the starting mixtures and sintered samples was analyzed by the X-ray diffraction method. In order to determine temperature intervals of chemical reactions and phase transitions, differential thermal analyses (DTA) and thermo-gravimetric analysis were used. Kissinger's equation was employed to calculate apparent activation energies of various processes that occur within the system during 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 more than 100 A degrees C, comparing to the literature data.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA",
pages = "673-667",
number = "2",
volume = "124",
doi = "10.1007/s10973-015-5132-9",
url = "conv_757"
}

Obradović, N., Đorđević, N., Filipović, S., Marković, S., Kosanović, D., Mitrić, M.,& Pavlović, V.. (2016). Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 124(2), 667-673.
https://doi.org/10.1007/s10973-015-5132-9
conv_757

Obradović N, Đorđević N, Filipović S, Marković S, Kosanović D, Mitrić M, Pavlović V. Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA. in Journal of Thermal Analysis and Calorimetry. 2016;124(2):667-673.
doi:10.1007/s10973-015-5132-9
conv_757 .

Obradović, Nina, Đorđević, Nataša, Filipović, Suzana, Marković, Smilja, Kosanović, Darko, Mitrić, Miodrag, Pavlović, Vladimir, "Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA" in Journal of Thermal Analysis and Calorimetry, 124, no. 2 (2016):667-673,
https://doi.org/10.1007/s10973-015-5132-9 .,
conv_757 .

TY  - JOUR
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Filipović, Suzana
AU  - Nikolić, N.
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
AU  - Pavlović, Vladimir
PY  - 2012
UR  - https://ritnms.itnms.ac.rs/handle/123456789/202
AB  - Due to its outstanding electrical characteristics, such as the low temperature expansion coefficient, low dielectric constant and good mechanical properties, cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2), is a very attractive high-temperature ceramic material. In order to accelerate the process of sintering, 2.50 mass% Bi2O3 has been added to the starting mixtures. Liquid phase sintering caused by the presence of bismuth-oxide lowers the temperature of cordierite formation. The mechanical activation of the starting mixtures (0-56 min in vibro-mill) additionally lowers sintering temperatures. The sintering process was performed at 1200, 1300, 1350 and 1400 degrees C, for 2 h. 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 and sintered materials was analyzed by the X-ray diffraction method. Furthermore, scanning electron microscopy (SEM) was used in the analysis of the powder morphology.
PB  - Elsevier, Amsterdam
T2  - Powder Technology
T1  - Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive
EP  - 161
SP  - 157
VL  - 218
DO  - 10.1016/j.powtec.2011.12.012
UR  - conv_610
ER  - 

@article{
author = "Obradović, Nina and Đorđević, Nataša and Filipović, Suzana and Nikolić, N. and Kosanović, Darko and Mitrić, Miodrag and Marković, Smilja and Pavlović, Vladimir",
year = "2012",
abstract = "Due to its outstanding electrical characteristics, such as the low temperature expansion coefficient, low dielectric constant and good mechanical properties, cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2), is a very attractive high-temperature ceramic material. In order to accelerate the process of sintering, 2.50 mass% Bi2O3 has been added to the starting mixtures. Liquid phase sintering caused by the presence of bismuth-oxide lowers the temperature of cordierite formation. The mechanical activation of the starting mixtures (0-56 min in vibro-mill) additionally lowers sintering temperatures. The sintering process was performed at 1200, 1300, 1350 and 1400 degrees C, for 2 h. 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 and sintered materials was analyzed by the X-ray diffraction method. Furthermore, scanning electron microscopy (SEM) was used in the analysis of the powder morphology.",
publisher = "Elsevier, Amsterdam",
journal = "Powder Technology",
title = "Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive",
pages = "161-157",
volume = "218",
doi = "10.1016/j.powtec.2011.12.012",
url = "conv_610"
}

Obradović, N., Đorđević, N., Filipović, S., Nikolić, N., Kosanović, D., Mitrić, M., Marković, S.,& Pavlović, V.. (2012). Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive. in Powder Technology
Elsevier, Amsterdam., 218, 157-161.
https://doi.org/10.1016/j.powtec.2011.12.012
conv_610

Obradović N, Đorđević N, Filipović S, Nikolić N, Kosanović D, Mitrić M, Marković S, Pavlović V. Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive. in Powder Technology. 2012;218:157-161.
doi:10.1016/j.powtec.2011.12.012
conv_610 .

Obradović, Nina, Đorđević, Nataša, Filipović, Suzana, Nikolić, N., Kosanović, Darko, Mitrić, Miodrag, Marković, Smilja, Pavlović, Vladimir, "Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive" in Powder Technology, 218 (2012):157-161,
https://doi.org/10.1016/j.powtec.2011.12.012 .,
conv_610 .

TY  - JOUR
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Pavlović, V.
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
AU  - Mitić, Vojislav V.
AU  - Đorđević, Nataša
AU  - Ristić, M. M.
PY  - 2011
UR  - https://ritnms.itnms.ac.rs/handle/123456789/201
AB  - Mixtures of BaCO3-ZnO-TiO2 were mechanically activated using high-energy planetary ball mill during 20, 40 and 80 min. As the time of mechanical activation increased, the decrease in particle size was observed. The effect of milling on microstructure was investigated by scanning electron microscopy, as well. Sintering process was performed in air at 1100 and 1200 C for 2 h. Various phases are present within mixtures sintered at 1100 and 1200 degrees C, and almost pure BaZn2Ti4O11 phase was obtained after 80 min of milling and sintering at 1200 degrees C for 2 h.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Isothermal sintering of barium-zinc-titanate ceramics
EP  - 27
IS  - 1
SP  - 21
VL  - 37
DO  - 10.1016/j.ceramint.2010.07.001
UR  - conv_596
ER  - 

@article{
author = "Obradović, Nina and Filipović, Suzana and Pavlović, V. and Mitrić, Miodrag and Marković, Smilja and Mitić, Vojislav V. and Đorđević, Nataša and Ristić, M. M.",
year = "2011",
abstract = "Mixtures of BaCO3-ZnO-TiO2 were mechanically activated using high-energy planetary ball mill during 20, 40 and 80 min. As the time of mechanical activation increased, the decrease in particle size was observed. The effect of milling on microstructure was investigated by scanning electron microscopy, as well. Sintering process was performed in air at 1100 and 1200 C for 2 h. Various phases are present within mixtures sintered at 1100 and 1200 degrees C, and almost pure BaZn2Ti4O11 phase was obtained after 80 min of milling and sintering at 1200 degrees C for 2 h.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Isothermal sintering of barium-zinc-titanate ceramics",
pages = "27-21",
number = "1",
volume = "37",
doi = "10.1016/j.ceramint.2010.07.001",
url = "conv_596"
}

Obradović, N., Filipović, S., Pavlović, V., Mitrić, M., Marković, S., Mitić, V. V., Đorđević, N.,& Ristić, M. M.. (2011). Isothermal sintering of barium-zinc-titanate ceramics. in Ceramics International
Elsevier Sci Ltd, Oxford., 37(1), 21-27.
https://doi.org/10.1016/j.ceramint.2010.07.001
conv_596

Obradović N, Filipović S, Pavlović V, Mitrić M, Marković S, Mitić VV, Đorđević N, Ristić MM. Isothermal sintering of barium-zinc-titanate ceramics. in Ceramics International. 2011;37(1):21-27.
doi:10.1016/j.ceramint.2010.07.001
conv_596 .

Obradović, Nina, Filipović, Suzana, Pavlović, V., Mitrić, Miodrag, Marković, Smilja, Mitić, Vojislav V., Đorđević, Nataša, Ristić, M. M., "Isothermal sintering of barium-zinc-titanate ceramics" in Ceramics International, 37, no. 1 (2011):21-27,
https://doi.org/10.1016/j.ceramint.2010.07.001 .,
conv_596 .