TY  - JOUR
AU  - Obradović, Nina
AU  - Dordevic, N.
AU  - Peleš, Adriana
AU  - Filipović, Suzana
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/565
AB  - Due to its characteristics, cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2), is a high-temperature ceramic material of a great scientific interest. Mechanical activation of the starting mixtures containing 5.00 mass% TiO2 was performed in a high-energy ball mill for 10 minutes. The compaction pressure varied from 0.5 to 6tcm(-2) (49-588 MPa). The sintering process was performed at 1350 degrees C for four hours in the air atmosphere. The phase composition of the activated and sintered samples was analyzed using X-ray diffraction. Scanning electron microscopy was used to analyze the microstructure of both compacted and sintered samples. The authors have investigated the influence of compaction pressure on the sintered samples and their electrical properties.
T2  - Science of Sintering
T1  - The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics
VL  - 47
IS  - 1
SP  - 15
EP  - 22
DO  - 10.2298/SOS1501015O
ER  - 

@article{
author = "Obradović, Nina and Dordevic, N. and Peleš, Adriana and Filipović, Suzana and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2015",
abstract = "Due to its characteristics, cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2), is a high-temperature ceramic material of a great scientific interest. Mechanical activation of the starting mixtures containing 5.00 mass% TiO2 was performed in a high-energy ball mill for 10 minutes. The compaction pressure varied from 0.5 to 6tcm(-2) (49-588 MPa). The sintering process was performed at 1350 degrees C for four hours in the air atmosphere. The phase composition of the activated and sintered samples was analyzed using X-ray diffraction. Scanning electron microscopy was used to analyze the microstructure of both compacted and sintered samples. The authors have investigated the influence of compaction pressure on the sintered samples and their electrical properties.",
journal = "Science of Sintering",
title = "The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics",
volume = "47",
number = "1",
pages = "15-22",
doi = "10.2298/SOS1501015O"
}

Obradović, N., Dordevic, N., Peleš, A., Filipović, S., Mitrić, M.,& Pavlović, V. B.. (2015). The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics. in Science of Sintering, 47(1), 15-22.
https://doi.org/10.2298/SOS1501015O

Obradović N, Dordevic N, Peleš A, Filipović S, Mitrić M, Pavlović VB. The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics. in Science of Sintering. 2015;47(1):15-22.
doi:10.2298/SOS1501015O .

Obradović, Nina, Dordevic, N., Peleš, Adriana, Filipović, Suzana, Mitrić, Miodrag, Pavlović, Vladimir B., "The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics" in Science of Sintering, 47, no. 1 (2015):15-22,
https://doi.org/10.2298/SOS1501015O . .

TY  - JOUR
AU  - Dordevic, N.
AU  - Obradović, Nina
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Pavlović, Vera P.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/374
AB  - Cordierite (MAS) is difficult to sinter because of the very narrow sintering temperature range (1300-1400 degrees C). Because a low temperature process is desirable, it is necessary to find functional ads which can allow easier sintering process at lower temperature. The influence of MoO3 on the preparation process of cordierite ceramics was investigated. 2MgO-2Al(2)O(3)-5SiO(2) was researched by sintering followed binary systems: MgO/MoO3, Al2O3/MoO3 and SiO2/MoO3 (all sintered at 850 degrees C and 1100 degrees C, sintering time 2h). Composition of these systems was 80 mass% of oxide and 20 mass% MoO3. The effects of sintering, the composition and morphology were followed by X-ray diffraction and SEM microscopy. It has been found that MoO3, beside liquid phase, forms intermediary unstable compounds with MgO and Al2O3, which is the significance information for further research. MAS ceramics were sintered with 20 mass% MoO3 at 1100 degrees C, 1200 degrees C and 1300 degrees C, during 2h.
T2  - Science of Sintering
T1  - Sintering of Cordierite in the Presence of MoO3 and Crystallization Analysis
VL  - 46
IS  - 3
SP  - 307
EP  - 313
DO  - 10.2298/SOS1403307D
ER  - 

@article{
author = "Dordevic, N. and Obradović, Nina and Kosanović, Darko and Mitrić, Miodrag and Pavlović, Vera P.",
year = "2014",
abstract = "Cordierite (MAS) is difficult to sinter because of the very narrow sintering temperature range (1300-1400 degrees C). Because a low temperature process is desirable, it is necessary to find functional ads which can allow easier sintering process at lower temperature. The influence of MoO3 on the preparation process of cordierite ceramics was investigated. 2MgO-2Al(2)O(3)-5SiO(2) was researched by sintering followed binary systems: MgO/MoO3, Al2O3/MoO3 and SiO2/MoO3 (all sintered at 850 degrees C and 1100 degrees C, sintering time 2h). Composition of these systems was 80 mass% of oxide and 20 mass% MoO3. The effects of sintering, the composition and morphology were followed by X-ray diffraction and SEM microscopy. It has been found that MoO3, beside liquid phase, forms intermediary unstable compounds with MgO and Al2O3, which is the significance information for further research. MAS ceramics were sintered with 20 mass% MoO3 at 1100 degrees C, 1200 degrees C and 1300 degrees C, during 2h.",
journal = "Science of Sintering",
title = "Sintering of Cordierite in the Presence of MoO3 and Crystallization Analysis",
volume = "46",
number = "3",
pages = "307-313",
doi = "10.2298/SOS1403307D"
}

Dordevic, N., Obradović, N., Kosanović, D., Mitrić, M.,& Pavlović, V. P.. (2014). Sintering of Cordierite in the Presence of MoO3 and Crystallization Analysis. in Science of Sintering, 46(3), 307-313.
https://doi.org/10.2298/SOS1403307D

Dordevic N, Obradović N, Kosanović D, Mitrić M, Pavlović VP. Sintering of Cordierite in the Presence of MoO3 and Crystallization Analysis. in Science of Sintering. 2014;46(3):307-313.
doi:10.2298/SOS1403307D .

Dordevic, N., Obradović, Nina, Kosanović, Darko, Mitrić, Miodrag, Pavlović, Vera P., "Sintering of Cordierite in the Presence of MoO3 and Crystallization Analysis" in Science of Sintering, 46, no. 3 (2014):307-313,
https://doi.org/10.2298/SOS1403307D . .

TY  - JOUR
AU  - Obradović, Nina
AU  - Dordevic, N.
AU  - Filipović, Suzana
AU  - Nikolic, N.
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
AU  - Pavlović, Vladimir B.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4702
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. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Powder Technology
T1  - Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive
VL  - 218
SP  - 157
EP  - 161
DO  - 10.1016/j.powtec.2011.12.012
ER  - 

@article{
author = "Obradović, Nina and Dordevic, N. and Filipović, Suzana and Nikolic, N. and Kosanović, Darko and Mitrić, Miodrag and Marković, Smilja and Pavlović, Vladimir B.",
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. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Powder Technology",
title = "Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive",
volume = "218",
pages = "157-161",
doi = "10.1016/j.powtec.2011.12.012"
}

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

Obradović N, Dordevic N, Filipović S, Nikolic N, Kosanović D, Mitrić M, Marković S, Pavlović VB. 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 .

Obradović, Nina, Dordevic, N., Filipović, Suzana, Nikolic, N., Kosanović, Darko, Mitrić, Miodrag, Marković, Smilja, Pavlović, Vladimir B., "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 . .

TY  - JOUR
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Pavlović, Vladimir B.
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
AU  - Mitić, Vojislav V. 
AU  - Dordevic, N.
AU  - Ristic, M. M.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4186
AB  - Mixtures of BaCO(3)-ZnO-TiO(2) 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 BaZn(2)Ti(4)O(11) phase was obtained after 80 min of milling and sintering at 1200 degrees C for 2 h. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
T2  - Ceramics International
T1  - Isothermal sintering of barium-zinc-titanate ceramics
VL  - 37
IS  - 1
SP  - 21
EP  - 27
DO  - 10.1016/j.ceramint.2010.07.001
ER  - 

@article{
author = "Obradović, Nina and Filipović, Suzana and Pavlović, Vladimir B. and Mitrić, Miodrag and Marković, Smilja and Mitić, Vojislav V.  and Dordevic, N. and Ristic, M. M.",
year = "2011",
abstract = "Mixtures of BaCO(3)-ZnO-TiO(2) 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 BaZn(2)Ti(4)O(11) phase was obtained after 80 min of milling and sintering at 1200 degrees C for 2 h. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
journal = "Ceramics International",
title = "Isothermal sintering of barium-zinc-titanate ceramics",
volume = "37",
number = "1",
pages = "21-27",
doi = "10.1016/j.ceramint.2010.07.001"
}

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

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

Obradović, Nina, Filipović, Suzana, Pavlović, Vladimir B., Mitrić, Miodrag, Marković, Smilja, Mitić, Vojislav V. , Dordevic, N., Ristic, 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 . .