TY  - JOUR
AU  - Kosanović, Darko
AU  - Blagojević, Vladimir A.
AU  - Maričić, Aleksa
AU  - Aleksić, S.
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Vlahović, Branislav
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2932
AB  - Barium hexaferrite ceramics were prepared using mechanically activated mixtures of iron and barium titanate. The 60:40 mass% Fe:BaTiO3 powder mixtures were mechanically activated for different times (100-240 min) and sintered at 1100 and 1200 degrees C in order to determine the influence of mechanical activation of the precursor on the magnetic and dielectric properties of the resulting barium hexaferrite ceramics. The final product contained 84-89 mass% of Ba2Fe22.46O38Ti1.54 phase, with higher content corresponding to longer mechanical activation of the precursor. XRD and Raman measurements indicated that the remainder of the sample consists of leftover BaTiO3 and hematite, which was formed by the oxidation of iron during mechanical activation and sintering in air. Magnetic properties of samples sintered at 1200 degrees C are superior to those sintered at 1100 degrees C, which can be attributed to higher Ba2Fe22.46O38Ti1.54 phase content. The position of the Curie temperature in 350-420 degrees C temperature region is consistent with 0.8:1 ratio of Ti to Ba. Maximum magnetization was observed for samples activated for 120 min. Dielectric properties of samples sintered at 1200 degrees C showed a dependence on frequency, with a significant drop in relative permittivity with an increase in frequency in the low-frequency region, and relatively constant values of relative permittivity in the high-frequency region. The tangent loss showed a decrease with increase in frequency, where peaks corresponding to the resonance of the electron hopping frequency with the external field were observed in the samples corresponding to the longer mechanical activation. Dielectric properties showed relatively small changes for samples activated longer than 150 min.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Influence of mechanical activation on functional properties of barium hexaferrite ceramics
EP  - 6672
IS  - 6
SP  - 6666
VL  - 44
DO  - 10.1016/j.ceramint.2018.01.078
ER  - 

@article{
author = "Kosanović, Darko and Blagojević, Vladimir A. and Maričić, Aleksa and Aleksić, S. and Pavlović, Vera P. and Pavlović, Vladimir B. and Vlahović, Branislav",
year = "2018",
abstract = "Barium hexaferrite ceramics were prepared using mechanically activated mixtures of iron and barium titanate. The 60:40 mass% Fe:BaTiO3 powder mixtures were mechanically activated for different times (100-240 min) and sintered at 1100 and 1200 degrees C in order to determine the influence of mechanical activation of the precursor on the magnetic and dielectric properties of the resulting barium hexaferrite ceramics. The final product contained 84-89 mass% of Ba2Fe22.46O38Ti1.54 phase, with higher content corresponding to longer mechanical activation of the precursor. XRD and Raman measurements indicated that the remainder of the sample consists of leftover BaTiO3 and hematite, which was formed by the oxidation of iron during mechanical activation and sintering in air. Magnetic properties of samples sintered at 1200 degrees C are superior to those sintered at 1100 degrees C, which can be attributed to higher Ba2Fe22.46O38Ti1.54 phase content. The position of the Curie temperature in 350-420 degrees C temperature region is consistent with 0.8:1 ratio of Ti to Ba. Maximum magnetization was observed for samples activated for 120 min. Dielectric properties of samples sintered at 1200 degrees C showed a dependence on frequency, with a significant drop in relative permittivity with an increase in frequency in the low-frequency region, and relatively constant values of relative permittivity in the high-frequency region. The tangent loss showed a decrease with increase in frequency, where peaks corresponding to the resonance of the electron hopping frequency with the external field were observed in the samples corresponding to the longer mechanical activation. Dielectric properties showed relatively small changes for samples activated longer than 150 min.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Influence of mechanical activation on functional properties of barium hexaferrite ceramics",
pages = "6672-6666",
number = "6",
volume = "44",
doi = "10.1016/j.ceramint.2018.01.078"
}

Kosanović, D., Blagojević, V. A., Maričić, A., Aleksić, S., Pavlović, V. P., Pavlović, V. B.,& Vlahović, B.. (2018). Influence of mechanical activation on functional properties of barium hexaferrite ceramics. in Ceramics International
Elsevier Sci Ltd, Oxford., 44(6), 6666-6672.
https://doi.org/10.1016/j.ceramint.2018.01.078

Kosanović D, Blagojević VA, Maričić A, Aleksić S, Pavlović VP, Pavlović VB, Vlahović B. Influence of mechanical activation on functional properties of barium hexaferrite ceramics. in Ceramics International. 2018;44(6):6666-6672.
doi:10.1016/j.ceramint.2018.01.078 .

Kosanović, Darko, Blagojević, Vladimir A., Maričić, Aleksa, Aleksić, S., Pavlović, Vera P., Pavlović, Vladimir B., Vlahović, Branislav, "Influence of mechanical activation on functional properties of barium hexaferrite ceramics" in Ceramics International, 44, no. 6 (2018):6666-6672,
https://doi.org/10.1016/j.ceramint.2018.01.078 . .

TY  - JOUR
AU  - Kosanović, Darko
AU  - Blagojević, Vladimir A.
AU  - Maričić, Aleksa
AU  - Aleksić, S.
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Vlahović, Branislav
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3947
AB  - Barium hexaferrite ceramics were prepared using mechanically activated mixtures of iron and barium titanate. The 60:40 mass% Fe:BaTiO3 powder mixtures were mechanically activated for different times (100-240 min) and sintered at 1100 and 1200 degrees C in order to determine the influence of mechanical activation of the precursor on the magnetic and dielectric properties of the resulting barium hexaferrite ceramics. The final product contained 84-89 mass% of Ba2Fe22.46O38Ti1.54 phase, with higher content corresponding to longer mechanical activation of the precursor. XRD and Raman measurements indicated that the remainder of the sample consists of leftover BaTiO3 and hematite, which was formed by the oxidation of iron during mechanical activation and sintering in air. Magnetic properties of samples sintered at 1200 degrees C are superior to those sintered at 1100 degrees C, which can be attributed to higher Ba2Fe22.46O38Ti1.54 phase content. The position of the Curie temperature in 350-420 degrees C temperature region is consistent with 0.8:1 ratio of Ti to Ba. Maximum magnetization was observed for samples activated for 120 min. Dielectric properties of samples sintered at 1200 degrees C showed a dependence on frequency, with a significant drop in relative permittivity with an increase in frequency in the low-frequency region, and relatively constant values of relative permittivity in the high-frequency region. The tangent loss showed a decrease with increase in frequency, where peaks corresponding to the resonance of the electron hopping frequency with the external field were observed in the samples corresponding to the longer mechanical activation. Dielectric properties showed relatively small changes for samples activated longer than 150 min.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Influence of mechanical activation on functional properties of barium hexaferrite ceramics
EP  - 6672
IS  - 6
SP  - 6666
VL  - 44
DO  - 10.1016/j.ceramint.2018.01.078
ER  - 

@article{
author = "Kosanović, Darko and Blagojević, Vladimir A. and Maričić, Aleksa and Aleksić, S. and Pavlović, Vera P. and Pavlović, Vladimir B. and Vlahović, Branislav",
year = "2018",
abstract = "Barium hexaferrite ceramics were prepared using mechanically activated mixtures of iron and barium titanate. The 60:40 mass% Fe:BaTiO3 powder mixtures were mechanically activated for different times (100-240 min) and sintered at 1100 and 1200 degrees C in order to determine the influence of mechanical activation of the precursor on the magnetic and dielectric properties of the resulting barium hexaferrite ceramics. The final product contained 84-89 mass% of Ba2Fe22.46O38Ti1.54 phase, with higher content corresponding to longer mechanical activation of the precursor. XRD and Raman measurements indicated that the remainder of the sample consists of leftover BaTiO3 and hematite, which was formed by the oxidation of iron during mechanical activation and sintering in air. Magnetic properties of samples sintered at 1200 degrees C are superior to those sintered at 1100 degrees C, which can be attributed to higher Ba2Fe22.46O38Ti1.54 phase content. The position of the Curie temperature in 350-420 degrees C temperature region is consistent with 0.8:1 ratio of Ti to Ba. Maximum magnetization was observed for samples activated for 120 min. Dielectric properties of samples sintered at 1200 degrees C showed a dependence on frequency, with a significant drop in relative permittivity with an increase in frequency in the low-frequency region, and relatively constant values of relative permittivity in the high-frequency region. The tangent loss showed a decrease with increase in frequency, where peaks corresponding to the resonance of the electron hopping frequency with the external field were observed in the samples corresponding to the longer mechanical activation. Dielectric properties showed relatively small changes for samples activated longer than 150 min.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Influence of mechanical activation on functional properties of barium hexaferrite ceramics",
pages = "6672-6666",
number = "6",
volume = "44",
doi = "10.1016/j.ceramint.2018.01.078"
}

Kosanović, D., Blagojević, V. A., Maričić, A., Aleksić, S., Pavlović, V. P., Pavlović, V. B.,& Vlahović, B.. (2018). Influence of mechanical activation on functional properties of barium hexaferrite ceramics. in Ceramics International
Elsevier Sci Ltd, Oxford., 44(6), 6666-6672.
https://doi.org/10.1016/j.ceramint.2018.01.078

Kosanović D, Blagojević VA, Maričić A, Aleksić S, Pavlović VP, Pavlović VB, Vlahović B. Influence of mechanical activation on functional properties of barium hexaferrite ceramics. in Ceramics International. 2018;44(6):6666-6672.
doi:10.1016/j.ceramint.2018.01.078 .

Kosanović, Darko, Blagojević, Vladimir A., Maričić, Aleksa, Aleksić, S., Pavlović, Vera P., Pavlović, Vladimir B., Vlahović, Branislav, "Influence of mechanical activation on functional properties of barium hexaferrite ceramics" in Ceramics International, 44, no. 6 (2018):6666-6672,
https://doi.org/10.1016/j.ceramint.2018.01.078 . .

TY  - JOUR
AU  - Kosanović, Darko
AU  - Obradović, Nina
AU  - Pavlović, Vera P.
AU  - Marković, Smilja
AU  - Maričić, Aleksa
AU  - Rasić, G.
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir B.
AU  - Ristić, Momčilo M.
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2463
AB  - Crystal structure and morphology of mechanically activated nanocrystalline Fe/BaTiO3 was investigated using a combination of spectroscopic and microscopic methods. These show that mechanical activation led to the creation of new surfaces and the comminution of the initial powder particles. Prolonged milling resulted in formation of larger agglomerates of BaTiO3 and bimodal particle size distribution, where BaTiO3 particles were significantly larger than those of iron-containing phases. Milling times of 210 min and above lead to a significant decrease in temperature of the oxidation of iron in the sample, indicating abrupt change in reactivity. Raman spectroscopy analysis has revealed that activation had a pronounced influence on Fe/BaTiO3 lattice, thereby affecting both the stability of the crystal structure and the phase transition phenomena.
PB  - Elsevier, Amsterdam
T2  - Materials Science and Engineering B-Advanced Functional Solid-State Materials
T1  - The influence of mechanical activation on the morphological changes of Fe/BaTiO3 powder
EP  - 95
SP  - 89
VL  - 212
DO  - 10.1016/j.mseb.2016.07.016
ER  - 

@article{
author = "Kosanović, Darko and Obradović, Nina and Pavlović, Vera P. and Marković, Smilja and Maričić, Aleksa and Rasić, G. and Vlahović, Branislav and Pavlović, Vladimir B. and Ristić, Momčilo M.",
year = "2016",
abstract = "Crystal structure and morphology of mechanically activated nanocrystalline Fe/BaTiO3 was investigated using a combination of spectroscopic and microscopic methods. These show that mechanical activation led to the creation of new surfaces and the comminution of the initial powder particles. Prolonged milling resulted in formation of larger agglomerates of BaTiO3 and bimodal particle size distribution, where BaTiO3 particles were significantly larger than those of iron-containing phases. Milling times of 210 min and above lead to a significant decrease in temperature of the oxidation of iron in the sample, indicating abrupt change in reactivity. Raman spectroscopy analysis has revealed that activation had a pronounced influence on Fe/BaTiO3 lattice, thereby affecting both the stability of the crystal structure and the phase transition phenomena.",
publisher = "Elsevier, Amsterdam",
journal = "Materials Science and Engineering B-Advanced Functional Solid-State Materials",
title = "The influence of mechanical activation on the morphological changes of Fe/BaTiO3 powder",
pages = "95-89",
volume = "212",
doi = "10.1016/j.mseb.2016.07.016"
}

Kosanović, D., Obradović, N., Pavlović, V. P., Marković, S., Maričić, A., Rasić, G., Vlahović, B., Pavlović, V. B.,& Ristić, M. M.. (2016). The influence of mechanical activation on the morphological changes of Fe/BaTiO3 powder. in Materials Science and Engineering B-Advanced Functional Solid-State Materials
Elsevier, Amsterdam., 212, 89-95.
https://doi.org/10.1016/j.mseb.2016.07.016

Kosanović D, Obradović N, Pavlović VP, Marković S, Maričić A, Rasić G, Vlahović B, Pavlović VB, Ristić MM. The influence of mechanical activation on the morphological changes of Fe/BaTiO3 powder. in Materials Science and Engineering B-Advanced Functional Solid-State Materials. 2016;212:89-95.
doi:10.1016/j.mseb.2016.07.016 .

Kosanović, Darko, Obradović, Nina, Pavlović, Vera P., Marković, Smilja, Maričić, Aleksa, Rasić, G., Vlahović, Branislav, Pavlović, Vladimir B., Ristić, Momčilo M., "The influence of mechanical activation on the morphological changes of Fe/BaTiO3 powder" in Materials Science and Engineering B-Advanced Functional Solid-State Materials, 212 (2016):89-95,
https://doi.org/10.1016/j.mseb.2016.07.016 . .

TY  - JOUR
AU  - Peleš, Adriana
AU  - Pavlović, Vera P.
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Mančić, Lidija
AU  - Krstić, Jugoslav B.
AU  - Mitrić, Miodrag
AU  - Vlahović, Branislav
AU  - Rasić, G.
AU  - Kosanović, Darko
AU  - Pavlović, Vladimir B.
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2087
AB  - Commercially available ZnO powder was mechanically activated in a planetary ball mill. In order to investigate the specific surface area, pore volume and microstructure of non-activated and mechanically activated ZnO powders the authors performed N2 physisorption, SEM and TEM. Crystallite size and lattice microstrain were analyzed by X-ray diffraction method. XRD patterns indicate that peak intensities are getting lower and expend with activation time. The reduction in crystallite size and increasing of lattice microstrain with prolonged milling time were determined applying the Rietveld's method. The difference between non-activated and the activated powder has been also observed by X-ray photoelectron spectroscopy (XPS). XPS is used for investigating the chemical bonding of ZnO powder by analyzing the energy of photoelectrons. The lattice vibration spectra were obtained using Raman spectroscopy. In Raman spectra some changes along with atypical resonant scattering were noticed, which were caused by mechanical activation.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Structural investigation of mechanically activated ZnO powder
EP  - 979
SP  - 971
VL  - 648
DO  - 10.1016/j.jallcom.2015.06.247
ER  - 

@article{
author = "Peleš, Adriana and Pavlović, Vera P. and Filipović, Suzana and Obradović, Nina and Mančić, Lidija and Krstić, Jugoslav B. and Mitrić, Miodrag and Vlahović, Branislav and Rasić, G. and Kosanović, Darko and Pavlović, Vladimir B.",
year = "2015",
abstract = "Commercially available ZnO powder was mechanically activated in a planetary ball mill. In order to investigate the specific surface area, pore volume and microstructure of non-activated and mechanically activated ZnO powders the authors performed N2 physisorption, SEM and TEM. Crystallite size and lattice microstrain were analyzed by X-ray diffraction method. XRD patterns indicate that peak intensities are getting lower and expend with activation time. The reduction in crystallite size and increasing of lattice microstrain with prolonged milling time were determined applying the Rietveld's method. The difference between non-activated and the activated powder has been also observed by X-ray photoelectron spectroscopy (XPS). XPS is used for investigating the chemical bonding of ZnO powder by analyzing the energy of photoelectrons. The lattice vibration spectra were obtained using Raman spectroscopy. In Raman spectra some changes along with atypical resonant scattering were noticed, which were caused by mechanical activation.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Structural investigation of mechanically activated ZnO powder",
pages = "979-971",
volume = "648",
doi = "10.1016/j.jallcom.2015.06.247"
}

Peleš, A., Pavlović, V. P., Filipović, S., Obradović, N., Mančić, L., Krstić, J. B., Mitrić, M., Vlahović, B., Rasić, G., Kosanović, D.,& Pavlović, V. B.. (2015). Structural investigation of mechanically activated ZnO powder. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 648, 971-979.
https://doi.org/10.1016/j.jallcom.2015.06.247

Peleš A, Pavlović VP, Filipović S, Obradović N, Mančić L, Krstić JB, Mitrić M, Vlahović B, Rasić G, Kosanović D, Pavlović VB. Structural investigation of mechanically activated ZnO powder. in Journal of Alloys and Compounds. 2015;648:971-979.
doi:10.1016/j.jallcom.2015.06.247 .

Peleš, Adriana, Pavlović, Vera P., Filipović, Suzana, Obradović, Nina, Mančić, Lidija, Krstić, Jugoslav B., Mitrić, Miodrag, Vlahović, Branislav, Rasić, G., Kosanović, Darko, Pavlović, Vladimir B., "Structural investigation of mechanically activated ZnO powder" in Journal of Alloys and Compounds, 648 (2015):971-979,
https://doi.org/10.1016/j.jallcom.2015.06.247 . .

TY  - JOUR
AU  - Peleš, Adriana
AU  - Pavlović, Vera P.
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Mančić, Lidija
AU  - Krstić, Jugoslav B.
AU  - Mitrić, Miodrag
AU  - Vlahović, Branislav
AU  - Rasić, G.
AU  - Kosanović, Darko
AU  - Pavlović, Vladimir B.
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3948
AB  - Commercially available ZnO powder was mechanically activated in a planetary ball mill. In order to investigate the specific surface area, pore volume and microstructure of non-activated and mechanically activated ZnO powders the authors performed N2 physisorption , SEM and TEM. Crystallite size and lattice microstrain were analyzed by X-ray diffraction method. XRD patterns indicate that peak intensities are getting lower and expend with activation time. The reduction in crystallite size and increasing of lattice microstrain with prolonged milling time were determined applying the Rietveld's method. The difference between non-activated and the activated powder has been also observed by X-ray photoelectron spectroscopy (XPS). XPS is used for investigating the chemical bonding of ZnO powder by analyzing the energy of photoelectrons. The lattice vibration spectra were obtained using Raman spectroscopy. In Raman spectra some changes along with atypical resonant scattering were noticed, which were caused by mechanical activation.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Structural investigation of mechanically activated ZnO powder
EP  - 979
SP  - 971
VL  - 648
DO  - 10.1016/j.jallcom.2015.06.247
ER  - 

@article{
author = "Peleš, Adriana and Pavlović, Vera P. and Filipović, Suzana and Obradović, Nina and Mančić, Lidija and Krstić, Jugoslav B. and Mitrić, Miodrag and Vlahović, Branislav and Rasić, G. and Kosanović, Darko and Pavlović, Vladimir B.",
year = "2015",
abstract = "Commercially available ZnO powder was mechanically activated in a planetary ball mill. In order to investigate the specific surface area, pore volume and microstructure of non-activated and mechanically activated ZnO powders the authors performed N2 physisorption , SEM and TEM. Crystallite size and lattice microstrain were analyzed by X-ray diffraction method. XRD patterns indicate that peak intensities are getting lower and expend with activation time. The reduction in crystallite size and increasing of lattice microstrain with prolonged milling time were determined applying the Rietveld's method. The difference between non-activated and the activated powder has been also observed by X-ray photoelectron spectroscopy (XPS). XPS is used for investigating the chemical bonding of ZnO powder by analyzing the energy of photoelectrons. The lattice vibration spectra were obtained using Raman spectroscopy. In Raman spectra some changes along with atypical resonant scattering were noticed, which were caused by mechanical activation.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Structural investigation of mechanically activated ZnO powder",
pages = "979-971",
volume = "648",
doi = "10.1016/j.jallcom.2015.06.247"
}

Peleš, A., Pavlović, V. P., Filipović, S., Obradović, N., Mančić, L., Krstić, J. B., Mitrić, M., Vlahović, B., Rasić, G., Kosanović, D.,& Pavlović, V. B.. (2015). Structural investigation of mechanically activated ZnO powder. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 648, 971-979.
https://doi.org/10.1016/j.jallcom.2015.06.247

Peleš A, Pavlović VP, Filipović S, Obradović N, Mančić L, Krstić JB, Mitrić M, Vlahović B, Rasić G, Kosanović D, Pavlović VB. Structural investigation of mechanically activated ZnO powder. in Journal of Alloys and Compounds. 2015;648:971-979.
doi:10.1016/j.jallcom.2015.06.247 .

Peleš, Adriana, Pavlović, Vera P., Filipović, Suzana, Obradović, Nina, Mančić, Lidija, Krstić, Jugoslav B., Mitrić, Miodrag, Vlahović, Branislav, Rasić, G., Kosanović, Darko, Pavlović, Vladimir B., "Structural investigation of mechanically activated ZnO powder" in Journal of Alloys and Compounds, 648 (2015):971-979,
https://doi.org/10.1016/j.jallcom.2015.06.247 . .

TY  - JOUR
AU  - Kosanović, Darko
AU  - Živojinović, Jelena
AU  - Obradović, Nina
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Peleš, Adriana
AU  - Ristić, Momčilo M.
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1918
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 °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 XC=f(log ν)) were performed for ceramics sintered at 1400 °C for 2 h. It has been found that mechanical activation can reduce the sintering temperature by around 100 °C, which leads to significant energy savings. Furthermore, activated for 80 min and sintered at 1400 °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 Živojinović, Jelena and Obradović, Nina and Pavlović, Vera P. and Pavlović, Vladimir B. and Peleš, Adriana and Ristić, Momčilo 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 °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 XC=f(log ν)) were performed for ceramics sintered at 1400 °C for 2 h. It has been found that mechanical activation can reduce the sintering temperature by around 100 °C, which leads to significant energy savings. Furthermore, activated for 80 min and sintered at 1400 °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., Živojinović, J., Obradović, N., Pavlović, V. P., Pavlović, V. B., Peleš, 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, Živojinović J, Obradović N, Pavlović VP, Pavlović VB, Peleš A, Ristić MM. 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, Živojinović, Jelena, Obradović, Nina, Pavlović, Vera P., Pavlović, Vladimir B., Peleš, Adriana, Ristić, Momčilo 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  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Pavlović, Vera P.
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2022
AB  - Cordierite (MAS) is difficult to sinter because of the very narrow sintering temperature range (1300-1400°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-2Al2O3-5SiO2 was researched by sintering followed binary systems: MgO/MoO3, Al2O3/MoO3 and SiO2/MoO3 (all sintered at 850°C and 1100°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°C, 1200°C and 1300°C, during 2h.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Sintering of Cordierite in the Presence of MoO3 and Crystallization Analysis
EP  - 313
IS  - 3
SP  - 307
VL  - 46
DO  - 10.2298/SOS1403307D
ER  - 

@article{
author = "Đorđević, Nataša 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°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-2Al2O3-5SiO2 was researched by sintering followed binary systems: MgO/MoO3, Al2O3/MoO3 and SiO2/MoO3 (all sintered at 850°C and 1100°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°C, 1200°C and 1300°C, during 2h.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Sintering of Cordierite in the Presence of MoO3 and Crystallization Analysis",
pages = "313-307",
number = "3",
volume = "46",
doi = "10.2298/SOS1403307D"
}

Đorđević, 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
Međunarodni Institut za nauku o sinterovanju, Beograd., 46(3), 307-313.
https://doi.org/10.2298/SOS1403307D

Đorđević 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 .

Đorđević, Nataša, 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  - Kosanović, Darko
AU  - Obradović, Nina
AU  - Živojinović, Jelena
AU  - Maričić, Aleksa
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Ristić, Momčilo M.
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1496
AB  - U ovom radu proučavan je uticaj mehaničke aktivacije na proces sinterovanja barijum-stroncijum-titanatne keramike. Neaktivirana i mehanički akativirane smeše (u temperatuskom intervalu 5 - 120 minuta) u visoko- energetskom planetarnom mlinu sinterovane su na 1100 - 1400°C dva sata u atmosferi vazduha. Uticaj mehaničke aktivacije na fazni sastav i kristalnu strukturu je analiziran pomoću rendgenske difrakcije, dok je defekat aktivacije i proces sinterovanja na mikrostrukturu ispitivan skenirajućom elektronskom mikroskopijom. Utvrđeno je da je temperatura od 1100°C bila isuviše niska da se podstakne završna faza sinterovanja za ovaj sistem. Električna merenja su sprovedena za najgušće keramike sinterovane na 1400°C dva sata.
AB  - In this article the influence of mechanical activation on sintering process of bariumstrontium-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°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°C was too low to induce final sintering stage for this system. Electrical measurements have been conducted for the densest ceramics sintered at 1400°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, Nina and Živojinović, Jelena and Maričić, Aleksa and Pavlović, Vera P. and Pavlović, Vladimir B. and Ristić, Momčilo M.",
year = "2012",
abstract = "U ovom radu proučavan je uticaj mehaničke aktivacije na proces sinterovanja barijum-stroncijum-titanatne keramike. Neaktivirana i mehanički akativirane smeše (u temperatuskom intervalu 5 - 120 minuta) u visoko- energetskom planetarnom mlinu sinterovane su na 1100 - 1400°C dva sata u atmosferi vazduha. Uticaj mehaničke aktivacije na fazni sastav i kristalnu strukturu je analiziran pomoću rendgenske difrakcije, dok je defekat aktivacije i proces sinterovanja na mikrostrukturu ispitivan skenirajućom elektronskom mikroskopijom. Utvrđeno je da je temperatura od 1100°C bila isuviše niska da se podstakne završna faza sinterovanja za ovaj sistem. Električna merenja su sprovedena za najgušće keramike sinterovane na 1400°C dva sata., In this article the influence of mechanical activation on sintering process of bariumstrontium-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°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°C was too low to induce final sintering stage for this system. Electrical measurements have been conducted for the densest ceramics sintered at 1400°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., Živojinović, J., Maričić, A., Pavlović, V. P., Pavlović, V. B.,& 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, Živojinović J, Maričić A, Pavlović VP, Pavlović VB, Ristić MM. 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, Nina, Živojinović, Jelena, Maričić, Aleksa, Pavlović, Vera P., Pavlović, Vladimir B., Ristić, Momčilo 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 . .