TY  - JOUR
AU  - Kosanović, Darko
AU  - Zivojinović, J.
AU  - Obradović, N.
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir
AU  - Peles, A.
AU  - Ristić, M.M.
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3418
AB  - Ferroelectric barium strontium titanate (Ba0.77Sr0.23TiO3), BST, was prepared by solid-state reactions using as the starting compounds powder of barium carbonate (BaCO3), strontium carbonate (SrCO3) and titanium dioxide (TiO2 anatase). Non-activated mixtures and mixtures mechanically activated in a high-energy planetary ball mill (0, 5, 10, 20, 40, 80 and 120 min) were sintered at 1100, 1200, 1300 and 1400 degrees C for 2 h in air atmosphere. Defects and the effect of the beginning of the sintering process on the microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements (loss tangent and resistivity as the function of frequency X-C =f(log nu)) were performed for ceramics sintered at 1400 degrees C for 2 h. It has been found that mechanical activation can reduce the sintering temperature by around 100 degrees C, which leads to significant energy savings. Furthermore, activated for 80 min and sintered at. 1400 degrees C for 2 h exhibit the largest density values and have about 36% lower dielectric loss at a frequency of 1 kHz and about 57% at a frequency of 10 kHz than the samples obtained from the initial non-activated powder sintered under the same conditions.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics
EP  - 11888
IS  - 8
SP  - 11883
VL  - 40
DO  - 10.1016/j.ceramint.2014.04.023
ER  - 

@article{
author = "Kosanović, Darko and Zivojinović, J. and Obradović, N. and Pavlović, Vera P. and Pavlović, Vladimir and Peles, A. and Ristić, M.M.",
year = "2014",
abstract = "Ferroelectric barium strontium titanate (Ba0.77Sr0.23TiO3), BST, was prepared by solid-state reactions using as the starting compounds powder of barium carbonate (BaCO3), strontium carbonate (SrCO3) and titanium dioxide (TiO2 anatase). Non-activated mixtures and mixtures mechanically activated in a high-energy planetary ball mill (0, 5, 10, 20, 40, 80 and 120 min) were sintered at 1100, 1200, 1300 and 1400 degrees C for 2 h in air atmosphere. Defects and the effect of the beginning of the sintering process on the microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements (loss tangent and resistivity as the function of frequency X-C =f(log nu)) were performed for ceramics sintered at 1400 degrees C for 2 h. It has been found that mechanical activation can reduce the sintering temperature by around 100 degrees C, which leads to significant energy savings. Furthermore, activated for 80 min and sintered at. 1400 degrees C for 2 h exhibit the largest density values and have about 36% lower dielectric loss at a frequency of 1 kHz and about 57% at a frequency of 10 kHz than the samples obtained from the initial non-activated powder sintered under the same conditions.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics",
pages = "11888-11883",
number = "8",
volume = "40",
doi = "10.1016/j.ceramint.2014.04.023"
}

Kosanović, D., Zivojinović, J., Obradović, N., Pavlović, V. P., Pavlović, V., Peles, A.,& Ristić, M.M.. (2014). The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics. in Ceramics International
Elsevier Sci Ltd, Oxford., 40(8), 11883-11888.
https://doi.org/10.1016/j.ceramint.2014.04.023

Kosanović D, Zivojinović J, Obradović N, Pavlović VP, Pavlović V, Peles A, Ristić M. The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics. in Ceramics International. 2014;40(8):11883-11888.
doi:10.1016/j.ceramint.2014.04.023 .

Kosanović, Darko, Zivojinović, J., Obradović, N., Pavlović, Vera P., Pavlović, Vladimir, Peles, A., Ristić, M.M., "The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics" in Ceramics International, 40, no. 8 (2014):11883-11888,
https://doi.org/10.1016/j.ceramint.2014.04.023 . .

TY  - JOUR
AU  - Kosanović, Darko
AU  - Obradović, N.
AU  - Zivojinović, J.
AU  - Filipović, Suzana
AU  - Maricić, A.
AU  - Pavlović, Vladimir
AU  - Tang, Y.
AU  - Ristić, M.M.
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3040
AB  - Barium-Strontium-Titanate Ba0.77Sr0.23TiO3 was prepared from starting materials BaCO3, SrCO3 and TiO2 through solid-state reactions. Mixtures of these oxides are mechanically activated in a high-energy planetary ball mill at different time intervals from 0 to 120 minutes. In order to obtain information on phase composition, crystal structure was determent by X-ray diffraction. It was observed that after 80 minutes in process synthesis Ba0.77Sr0.23TiO3 started Thermal analyzes were performed in order to determine the characteristic temperatures of the processes that occur in the solid phase. Particle size distribution, together with electron microscopy scanning has given us very useful information about the morphology of the powder.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Mechanical-Chemical Synthesis Ba0.77Sr0.23TiO3
EP  - 55
IS  - 1
SP  - 47
VL  - 44
DO  - 10.2298/SOS1201047K
ER  - 

@article{
author = "Kosanović, Darko and Obradović, N. and Zivojinović, J. and Filipović, Suzana and Maricić, A. and Pavlović, Vladimir and Tang, Y. and Ristić, M.M.",
year = "2012",
abstract = "Barium-Strontium-Titanate Ba0.77Sr0.23TiO3 was prepared from starting materials BaCO3, SrCO3 and TiO2 through solid-state reactions. Mixtures of these oxides are mechanically activated in a high-energy planetary ball mill at different time intervals from 0 to 120 minutes. In order to obtain information on phase composition, crystal structure was determent by X-ray diffraction. It was observed that after 80 minutes in process synthesis Ba0.77Sr0.23TiO3 started Thermal analyzes were performed in order to determine the characteristic temperatures of the processes that occur in the solid phase. Particle size distribution, together with electron microscopy scanning has given us very useful information about the morphology of the powder.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Mechanical-Chemical Synthesis Ba0.77Sr0.23TiO3",
pages = "55-47",
number = "1",
volume = "44",
doi = "10.2298/SOS1201047K"
}

Kosanović, D., Obradović, N., Zivojinović, J., Filipović, S., Maricić, A., Pavlović, V., Tang, Y.,& Ristić, M.M.. (2012). Mechanical-Chemical Synthesis Ba0.77Sr0.23TiO3. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 44(1), 47-55.
https://doi.org/10.2298/SOS1201047K

Kosanović D, Obradović N, Zivojinović J, Filipović S, Maricić A, Pavlović V, Tang Y, Ristić M. Mechanical-Chemical Synthesis Ba0.77Sr0.23TiO3. in Science of Sintering. 2012;44(1):47-55.
doi:10.2298/SOS1201047K .

Kosanović, Darko, Obradović, N., Zivojinović, J., Filipović, Suzana, Maricić, A., Pavlović, Vladimir, Tang, Y., Ristić, M.M., "Mechanical-Chemical Synthesis Ba0.77Sr0.23TiO3" in Science of Sintering, 44, no. 1 (2012):47-55,
https://doi.org/10.2298/SOS1201047K . .

TY  - JOUR
AU  - Kosanović, Darko
AU  - Obradović, N.
AU  - Zivojinović, J.
AU  - Maricić, A.
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir
AU  - Ristić, M.M.
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3050
AB  - In this article the influence of mechanical activation on sintering process of barium-strontium-titanate ceramics has been investigated. Both non-activated and mixtures treated in a planetary ball mill for 5, 10, 20, 40, 80 and 120 minutes were sintered at 1100-1400 degrees C for 2 hours in presence of air atmosphere. The influence of mechanical activation on phase composition and crystal structure has been analyzed by XRD, while the effect of activation and sintering process on microstructure was investigated by scanning electron microscopy. It has been established that temperature of 1100 degrees C was too low to induce final sintering stage for this system. Electrical measurements have been conducted for the densest ceramics sintered at 1400 degrees C for 2 hours.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - The Influence of Mechanical Activation on Sintering Process of BaCO3-SrCO3-TiO2 System
EP  - 280
IS  - 3
SP  - 271
VL  - 44
DO  - 10.2298/SOS1203271K
ER  - 

@article{
author = "Kosanović, Darko and Obradović, N. and Zivojinović, J. and Maricić, A. and Pavlović, Vera P. and Pavlović, Vladimir and Ristić, M.M.",
year = "2012",
abstract = "In this article the influence of mechanical activation on sintering process of barium-strontium-titanate ceramics has been investigated. Both non-activated and mixtures treated in a planetary ball mill for 5, 10, 20, 40, 80 and 120 minutes were sintered at 1100-1400 degrees C for 2 hours in presence of air atmosphere. The influence of mechanical activation on phase composition and crystal structure has been analyzed by XRD, while the effect of activation and sintering process on microstructure was investigated by scanning electron microscopy. It has been established that temperature of 1100 degrees C was too low to induce final sintering stage for this system. Electrical measurements have been conducted for the densest ceramics sintered at 1400 degrees C for 2 hours.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "The Influence of Mechanical Activation on Sintering Process of BaCO3-SrCO3-TiO2 System",
pages = "280-271",
number = "3",
volume = "44",
doi = "10.2298/SOS1203271K"
}

Kosanović, D., Obradović, N., Zivojinović, J., Maricić, A., Pavlović, V. P., Pavlović, V.,& Ristić, M.M.. (2012). The Influence of Mechanical Activation on Sintering Process of BaCO3-SrCO3-TiO2 System. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 44(3), 271-280.
https://doi.org/10.2298/SOS1203271K

Kosanović D, Obradović N, Zivojinović J, Maricić A, Pavlović VP, Pavlović V, Ristić M. The Influence of Mechanical Activation on Sintering Process of BaCO3-SrCO3-TiO2 System. in Science of Sintering. 2012;44(3):271-280.
doi:10.2298/SOS1203271K .

Kosanović, Darko, Obradović, N., Zivojinović, J., Maricić, A., Pavlović, Vera P., Pavlović, Vladimir, Ristić, M.M., "The Influence of Mechanical Activation on Sintering Process of BaCO3-SrCO3-TiO2 System" in Science of Sintering, 44, no. 3 (2012):271-280,
https://doi.org/10.2298/SOS1203271K . .