TY  - JOUR
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
AU  - Paunović, Verica G.
AU  - Kosanović, Darko
AU  - Balac, I.
AU  - Ristic, M. M.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4809
AB  - Starting mixtures of BaCO3, ZnO, and TiO2 powders are mechanically activated in a planetary ball mill for various periods of time. The powders obtained are sintered isothermally at 1100A degrees C for 120 min. Non-isothermal sintering process is followed by measurements with a sensitive dilatometer, as well. Results of microstructure characterization using SEM analyses along with DTA analyses are provided. These results are correlated with the values of electric resistivity, capacitance, and loss tangent of the samples, and it is found that with increasing milling time, the increase in values of electrical properties is noticed.
T2  - Powder Metallurgy and Metal Ceramics
T1  - Influence of mechanical activation on electrical properties of barium-zinc-titanate ceramics sintered at 1100A degrees C
VL  - 50
IS  - 11-12
SP  - 714
EP  - 718
DO  - 10.1007/s11106-012-9380-y
ER  - 

@article{
author = "Obradović, Nina and Filipović, Suzana and Mitrić, Miodrag and Pavlović, Vladimir B. and Paunović, Verica G. and Kosanović, Darko and Balac, I. and Ristic, M. M.",
year = "2012",
abstract = "Starting mixtures of BaCO3, ZnO, and TiO2 powders are mechanically activated in a planetary ball mill for various periods of time. The powders obtained are sintered isothermally at 1100A degrees C for 120 min. Non-isothermal sintering process is followed by measurements with a sensitive dilatometer, as well. Results of microstructure characterization using SEM analyses along with DTA analyses are provided. These results are correlated with the values of electric resistivity, capacitance, and loss tangent of the samples, and it is found that with increasing milling time, the increase in values of electrical properties is noticed.",
journal = "Powder Metallurgy and Metal Ceramics",
title = "Influence of mechanical activation on electrical properties of barium-zinc-titanate ceramics sintered at 1100A degrees C",
volume = "50",
number = "11-12",
pages = "714-718",
doi = "10.1007/s11106-012-9380-y"
}

Obradović, N., Filipović, S., Mitrić, M., Pavlović, V. B., Paunović, V. G., Kosanović, D., Balac, I.,& Ristic, M. M.. (2012). Influence of mechanical activation on electrical properties of barium-zinc-titanate ceramics sintered at 1100A degrees C. in Powder Metallurgy and Metal Ceramics, 50(11-12), 714-718.
https://doi.org/10.1007/s11106-012-9380-y

Obradović N, Filipović S, Mitrić M, Pavlović VB, Paunović VG, Kosanović D, Balac I, Ristic MM. Influence of mechanical activation on electrical properties of barium-zinc-titanate ceramics sintered at 1100A degrees C. in Powder Metallurgy and Metal Ceramics. 2012;50(11-12):714-718.
doi:10.1007/s11106-012-9380-y .

Obradović, Nina, Filipović, Suzana, Mitrić, Miodrag, Pavlović, Vladimir B., Paunović, Verica G., Kosanović, Darko, Balac, I., Ristic, M. M., "Influence of mechanical activation on electrical properties of barium-zinc-titanate ceramics sintered at 1100A degrees C" in Powder Metallurgy and Metal Ceramics, 50, no. 11-12 (2012):714-718,
https://doi.org/10.1007/s11106-012-9380-y . .

TY  - JOUR
AU  - Obradović, Nina
AU  - Nikolić, M. V.
AU  - Nikolic, N.
AU  - Filipović, Suzana
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
AU  - Nikolic, P. M.
AU  - Đorđević,  Antonije R.
AU  - Ristic, M. M.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5467
AB  - Mixtures of BaCO3, ZnO and TiO2 powders, with molar ratio of 1:2:4, were mechanically activated for 20, 40 and minutes in a planetary ball mill. The resulting powders were compacted into pellets and isothermally sintered at 1250 degrees C for 2h with a heating rate of 10 degrees C/min. X-ray diffraction analysis of obtained powders and sintered samples was performed in order to investigate changes of the phase composition. The microstructure of sintered samples was examined by scanning electron microscopy. The photoacoustic phase and amplitude spectra of sintered samples were measured as a function of the laser beam modulating frequency using a transmission detection configuration. Fitting of experimental data enabled determination of photoacoustic properties including thermal diffusivity. Based on the results obtained correlation between thermal diffusivity and experimental conditions, as well the samples microstructure characteristics, was discussed.
T2  - Science of Sintering
T1  - Synthesis of Barium-zinc-titanate Ceramics
VL  - 44
IS  - 1
SP  - 65
EP  - 71
DO  - 10.2298/SOS1201065O
ER  - 

@article{
author = "Obradović, Nina and Nikolić, M. V. and Nikolic, N. and Filipović, Suzana and Mitrić, Miodrag and Pavlović, Vladimir B. and Nikolic, P. M. and Đorđević,  Antonije R. and Ristic, M. M.",
year = "2012",
abstract = "Mixtures of BaCO3, ZnO and TiO2 powders, with molar ratio of 1:2:4, were mechanically activated for 20, 40 and minutes in a planetary ball mill. The resulting powders were compacted into pellets and isothermally sintered at 1250 degrees C for 2h with a heating rate of 10 degrees C/min. X-ray diffraction analysis of obtained powders and sintered samples was performed in order to investigate changes of the phase composition. The microstructure of sintered samples was examined by scanning electron microscopy. The photoacoustic phase and amplitude spectra of sintered samples were measured as a function of the laser beam modulating frequency using a transmission detection configuration. Fitting of experimental data enabled determination of photoacoustic properties including thermal diffusivity. Based on the results obtained correlation between thermal diffusivity and experimental conditions, as well the samples microstructure characteristics, was discussed.",
journal = "Science of Sintering",
title = "Synthesis of Barium-zinc-titanate Ceramics",
volume = "44",
number = "1",
pages = "65-71",
doi = "10.2298/SOS1201065O"
}

Obradović, N., Nikolić, M. V., Nikolic, N., Filipović, S., Mitrić, M., Pavlović, V. B., Nikolic, P. M., Đorđević, A. R.,& Ristic, M. M.. (2012). Synthesis of Barium-zinc-titanate Ceramics. in Science of Sintering, 44(1), 65-71.
https://doi.org/10.2298/SOS1201065O

Obradović N, Nikolić MV, Nikolic N, Filipović S, Mitrić M, Pavlović VB, Nikolic PM, Đorđević AR, Ristic MM. Synthesis of Barium-zinc-titanate Ceramics. in Science of Sintering. 2012;44(1):65-71.
doi:10.2298/SOS1201065O .

Obradović, Nina, Nikolić, M. V., Nikolic, N., Filipović, Suzana, Mitrić, Miodrag, Pavlović, Vladimir B., Nikolic, P. M., Đorđević,  Antonije R., Ristic, M. M., "Synthesis of Barium-zinc-titanate Ceramics" in Science of Sintering, 44, no. 1 (2012):65-71,
https://doi.org/10.2298/SOS1201065O . .

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 . .

TY  - JOUR
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Pavlović, Vladimir B.
AU  - Paunović, Verica G.
AU  - Mitrić, Miodrag
AU  - Ristic, M. M.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6925
AB  - The aim of this work was an investigation of structural and electrical properties of sintered barium-zinc-titanate ceramics. Mixtures of BaCO(3), ZnO and TiO(2) were mechanically activated in a planetary ball mill up to 80 minutes and sintered isothermally in air for 120 minutes at 1300 degrees C. The phase composition in the BaCO(3)-ZnO-TiO(2) system after milling and sintering was analyzed using the XRD method. The existence of pure barium-zinc-titanate has been registered. Microstructure analyses were performed using SEM. The results of electric resistivity, capacitance and loss tangent of the sintered samples were correlated with the XRD and SEM results.
T2  - Acta Physica Polonica A
T1  - Structural and Electrical Properties of Sintered Barium-Zinc-Titanate Ceramics
VL  - 120
IS  - 2
SP  - 322
EP  - 325
DO  - 10.12693/APhysPolA.120.322
ER  - 

@article{
author = "Obradović, Nina and Filipović, Suzana and Pavlović, Vladimir B. and Paunović, Verica G. and Mitrić, Miodrag and Ristic, M. M.",
year = "2011",
abstract = "The aim of this work was an investigation of structural and electrical properties of sintered barium-zinc-titanate ceramics. Mixtures of BaCO(3), ZnO and TiO(2) were mechanically activated in a planetary ball mill up to 80 minutes and sintered isothermally in air for 120 minutes at 1300 degrees C. The phase composition in the BaCO(3)-ZnO-TiO(2) system after milling and sintering was analyzed using the XRD method. The existence of pure barium-zinc-titanate has been registered. Microstructure analyses were performed using SEM. The results of electric resistivity, capacitance and loss tangent of the sintered samples were correlated with the XRD and SEM results.",
journal = "Acta Physica Polonica A",
title = "Structural and Electrical Properties of Sintered Barium-Zinc-Titanate Ceramics",
volume = "120",
number = "2",
pages = "322-325",
doi = "10.12693/APhysPolA.120.322"
}

Obradović, N., Filipović, S., Pavlović, V. B., Paunović, V. G., Mitrić, M.,& Ristic, M. M.. (2011). Structural and Electrical Properties of Sintered Barium-Zinc-Titanate Ceramics. in Acta Physica Polonica A, 120(2), 322-325.
https://doi.org/10.12693/APhysPolA.120.322

Obradović N, Filipović S, Pavlović VB, Paunović VG, Mitrić M, Ristic MM. Structural and Electrical Properties of Sintered Barium-Zinc-Titanate Ceramics. in Acta Physica Polonica A. 2011;120(2):322-325.
doi:10.12693/APhysPolA.120.322 .

Obradović, Nina, Filipović, Suzana, Pavlović, Vladimir B., Paunović, Verica G., Mitrić, Miodrag, Ristic, M. M., "Structural and Electrical Properties of Sintered Barium-Zinc-Titanate Ceramics" in Acta Physica Polonica A, 120, no. 2 (2011):322-325,
https://doi.org/10.12693/APhysPolA.120.322 . .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Pavlović, Vladimir B.
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Ristic, M. M.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4127
AB  - Mixtures of MgO-TiO2 were mechanically activated using high-energy planetary ball mill during 5, 10, 20, 40, 80 and 120 minutes. Sintering process was preformed in air at 1100 degrees-1400 degrees C for 2h. The decrease in powders particle size was noticed as the time of mechanical activation increased and confirmed by particle size analyzer. XRD analyses were performed in order to acquire the information about phase composition. Different ratio mixtures of MgTiO3 and Mg2TiO4 are present within all sintered samples. The effect of tribophysical activation on microstructure was investigated by scanning electron microscopy. The differential thermal gravimetric analysis has been performed in order to investigate thermal behaviour of the mixtures.
T2  - Science of Sintering
T1  - Influence of Mechanical Activation on Microstructure and Crystal Structure of Sintered MgO-TiO2 System
VL  - 42
IS  - 2
SP  - 143
EP  - 151
DO  - 10.2298/SOS100518002F
ER  - 

@article{
author = "Filipović, Suzana and Obradović, Nina and Pavlović, Vladimir B. and Marković, Smilja and Mitrić, Miodrag and Ristic, M. M.",
year = "2010",
abstract = "Mixtures of MgO-TiO2 were mechanically activated using high-energy planetary ball mill during 5, 10, 20, 40, 80 and 120 minutes. Sintering process was preformed in air at 1100 degrees-1400 degrees C for 2h. The decrease in powders particle size was noticed as the time of mechanical activation increased and confirmed by particle size analyzer. XRD analyses were performed in order to acquire the information about phase composition. Different ratio mixtures of MgTiO3 and Mg2TiO4 are present within all sintered samples. The effect of tribophysical activation on microstructure was investigated by scanning electron microscopy. The differential thermal gravimetric analysis has been performed in order to investigate thermal behaviour of the mixtures.",
journal = "Science of Sintering",
title = "Influence of Mechanical Activation on Microstructure and Crystal Structure of Sintered MgO-TiO2 System",
volume = "42",
number = "2",
pages = "143-151",
doi = "10.2298/SOS100518002F"
}

Filipović, S., Obradović, N., Pavlović, V. B., Marković, S., Mitrić, M.,& Ristic, M. M.. (2010). Influence of Mechanical Activation on Microstructure and Crystal Structure of Sintered MgO-TiO2 System. in Science of Sintering, 42(2), 143-151.
https://doi.org/10.2298/SOS100518002F

Filipović S, Obradović N, Pavlović VB, Marković S, Mitrić M, Ristic MM. Influence of Mechanical Activation on Microstructure and Crystal Structure of Sintered MgO-TiO2 System. in Science of Sintering. 2010;42(2):143-151.
doi:10.2298/SOS100518002F .

Filipović, Suzana, Obradović, Nina, Pavlović, Vladimir B., Marković, Smilja, Mitrić, Miodrag, Ristic, M. M., "Influence of Mechanical Activation on Microstructure and Crystal Structure of Sintered MgO-TiO2 System" in Science of Sintering, 42, no. 2 (2010):143-151,
https://doi.org/10.2298/SOS100518002F . .

TY  - JOUR
AU  - Obradović, Nina
AU  - Stevanović, Stojan
AU  - Mitrić, Miodrag
AU  - Nikolić, M. V.
AU  - Ristic, M. M.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3381
AB  - The aim of this work was analysis of isothermal sintering of zinc titanate ceramics doped with MgO obtained by mechanical activation. Mixtures of ZnO, TiO2 and MgO (0, 1.25 and 2.5%) were mechanically activated 15 minutes in a planetary ball mill. The powders obtained were pressed under different pressures and the results were fitted with a phenomenological compacting equation. Isothermal sintering was performed in air for 120 minutes at four different temperatures. Structural characterization of ZhO-TiO2-MgO system after milling was performed at room temperature using XRPD measurements. DTA measurements showed different activation energies for pure and doped ZnO-TiO2 systems. Thus addition of MgO stabilizes the crystal structure of zinc titanate.
T2  - Science of Sintering
T1  - Analysis of isothermal sintering of zinc-titanate doped with MgO
VL  - 39
IS  - 3
SP  - 241
EP  - 248
DO  - 10.2298/SOS0703241O
ER  - 

@article{
author = "Obradović, Nina and Stevanović, Stojan and Mitrić, Miodrag and Nikolić, M. V. and Ristic, M. M.",
year = "2007",
abstract = "The aim of this work was analysis of isothermal sintering of zinc titanate ceramics doped with MgO obtained by mechanical activation. Mixtures of ZnO, TiO2 and MgO (0, 1.25 and 2.5%) were mechanically activated 15 minutes in a planetary ball mill. The powders obtained were pressed under different pressures and the results were fitted with a phenomenological compacting equation. Isothermal sintering was performed in air for 120 minutes at four different temperatures. Structural characterization of ZhO-TiO2-MgO system after milling was performed at room temperature using XRPD measurements. DTA measurements showed different activation energies for pure and doped ZnO-TiO2 systems. Thus addition of MgO stabilizes the crystal structure of zinc titanate.",
journal = "Science of Sintering",
title = "Analysis of isothermal sintering of zinc-titanate doped with MgO",
volume = "39",
number = "3",
pages = "241-248",
doi = "10.2298/SOS0703241O"
}

Obradović, N., Stevanović, S., Mitrić, M., Nikolić, M. V.,& Ristic, M. M.. (2007). Analysis of isothermal sintering of zinc-titanate doped with MgO. in Science of Sintering, 39(3), 241-248.
https://doi.org/10.2298/SOS0703241O

Obradović N, Stevanović S, Mitrić M, Nikolić MV, Ristic MM. Analysis of isothermal sintering of zinc-titanate doped with MgO. in Science of Sintering. 2007;39(3):241-248.
doi:10.2298/SOS0703241O .

Obradović, Nina, Stevanović, Stojan, Mitrić, Miodrag, Nikolić, M. V., Ristic, M. M., "Analysis of isothermal sintering of zinc-titanate doped with MgO" in Science of Sintering, 39, no. 3 (2007):241-248,
https://doi.org/10.2298/SOS0703241O . .