TY  - CONF
AU  - Paunović, Vesna
AU  - Mitić, Vojislav V.
AU  - Kocić, Ljubiša
AU  - Marjanović, Miloš
AU  - Đorđević, Miloš
PY  - 2016
UR  - http://dais.sanu.ac.rs/123456789/875
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7549
AB  - The influence of rare-earth additive content on microstructure and electric properties of doped BaTiO3 ceramics is investigated. The concentration of Er2O3 and Yb2O3 in the doped samples range from 0.01 to 1.0at % . The samples are prepared by the conventional solid state reaction, and sintered at 1320° and 1350°C in air atmosphere for 4 hours. SEM analysis shows that all samples are characterized by polygonal grains. The uniform and homogeneous microstructure with grain size ranged from 20 to 45μm is the main low doped samples characteristics. For the samples doped with the higher dopant concentration (0.5 and 1.0 at%) the average grains size is ranged from 5 to 10μm. Dielectric measurements are carried out as a function of temperature up to 180°C at different frequencies. The low doped samples display the high value of dielectric permittivity at room temperature. A nearly flat permittivity-temperature response is obtained in specimens with higher additive content. The Curie temperature of doped samples were ranged from 126 to 130°C. The Curie constant for all series of samples decrease with increment of dopant concentration and the lowest values is mesured from samples doped with 0.01 wt% of aditive. The obtained value of γ pointed out that the specimens have almost sharp phase transition. Also, the specific electrical resistance is measured in function of temperature at the different frequencies from 100Hz to 1MHz. With increasing additives concentration, the electrical resistance decreases to the concentration of 0.5 at% and then increases.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 5th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2016; Belgrade
T1  - The Rare-Earths influences on doped BaTiO3-Ceramics Microstructure and Electric Characteristics
SP  - 44
EP  - 44
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7549
ER  - 

@conference{
author = "Paunović, Vesna and Mitić, Vojislav V. and Kocić, Ljubiša and Marjanović, Miloš and Đorđević, Miloš",
year = "2016",
abstract = "The influence of rare-earth additive content on microstructure and electric properties of doped BaTiO3 ceramics is investigated. The concentration of Er2O3 and Yb2O3 in the doped samples range from 0.01 to 1.0at % . The samples are prepared by the conventional solid state reaction, and sintered at 1320° and 1350°C in air atmosphere for 4 hours. SEM analysis shows that all samples are characterized by polygonal grains. The uniform and homogeneous microstructure with grain size ranged from 20 to 45μm is the main low doped samples characteristics. For the samples doped with the higher dopant concentration (0.5 and 1.0 at%) the average grains size is ranged from 5 to 10μm. Dielectric measurements are carried out as a function of temperature up to 180°C at different frequencies. The low doped samples display the high value of dielectric permittivity at room temperature. A nearly flat permittivity-temperature response is obtained in specimens with higher additive content. The Curie temperature of doped samples were ranged from 126 to 130°C. The Curie constant for all series of samples decrease with increment of dopant concentration and the lowest values is mesured from samples doped with 0.01 wt% of aditive. The obtained value of γ pointed out that the specimens have almost sharp phase transition. Also, the specific electrical resistance is measured in function of temperature at the different frequencies from 100Hz to 1MHz. With increasing additives concentration, the electrical resistance decreases to the concentration of 0.5 at% and then increases.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 5th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2016; Belgrade",
title = "The Rare-Earths influences on doped BaTiO3-Ceramics Microstructure and Electric Characteristics",
pages = "44-44",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7549"
}

Paunović, V., Mitić, V. V., Kocić, L., Marjanović, M.,& Đorđević, M.. (2016). The Rare-Earths influences on doped BaTiO3-Ceramics Microstructure and Electric Characteristics. in Advanced Ceramics and Application : 5th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2016; Belgrade
Belgrade : Serbian Ceramic Society., 44-44.
https://hdl.handle.net/21.15107/rcub_vinar_7549

Paunović V, Mitić VV, Kocić L, Marjanović M, Đorđević M. The Rare-Earths influences on doped BaTiO3-Ceramics Microstructure and Electric Characteristics. in Advanced Ceramics and Application : 5th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2016; Belgrade. 2016;:44-44.
https://hdl.handle.net/21.15107/rcub_vinar_7549 .

Paunović, Vesna, Mitić, Vojislav V., Kocić, Ljubiša, Marjanović, Miloš, Đorđević, Miloš, "The Rare-Earths influences on doped BaTiO3-Ceramics Microstructure and Electric Characteristics" in Advanced Ceramics and Application : 5th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2016; Belgrade (2016):44-44,
https://hdl.handle.net/21.15107/rcub_vinar_7549 .

TY  - CONF
AU  - Paunović, Vesna
AU  - Mitić, Vojislav V.
AU  - Živković, Ljiljana
AU  - Kocić, Ljubiša
PY  - 2014
UR  - http://dais.sanu.ac.rs/123456789/595
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7488
AB  - The samples of Sm/Mn codoped BaTiO3 ceramics, prepared by conventional solid state procedure with dopant concentrations ranged from 0.1 up to 5.0 at%, were investigated in this paper. The specimens were sintered at 1290°C and 1350°C in an air atmosphere for two hours. The low doped samples demonstrated the mainly uniform and homogeneous microstructure with average grain sizes ranged from 0.3 μm to 5.0 μm. The appearances of secondary abnormal grains in fine grain matrix and core-shell structure were observed in highly doped Sm/BaTiO3 sintered at 1350°C. Dielectric measurements were carried out as a function of temperature up to 200°C. The low doped samples, sintered at 1350°C, display the high value of dielectric permittivity (εr=6800 ) at room temperature. A nearly flat permittivity-response was obtained in specimens with 5.0 at% additive content. Using a modified Curie-Weiss low the Curie-like constant C´ and a critical exponent γ were calculated. The obtained values of γ pointed out the diffuse phase transformation in heavily doped BaTiO3 samples.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 3rd Serbian Ceramic Society Conference : program and the book of abstracts; September 29 - October 1, 2014; Belgrade
T1  - Influence of Sm2O3 on the Microstructure and Dielectric Characteristics of Codoped BaTiO3 Ceramics
SP  - 62
EP  - 62
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7488
ER  - 

@conference{
author = "Paunović, Vesna and Mitić, Vojislav V. and Živković, Ljiljana and Kocić, Ljubiša",
year = "2014",
abstract = "The samples of Sm/Mn codoped BaTiO3 ceramics, prepared by conventional solid state procedure with dopant concentrations ranged from 0.1 up to 5.0 at%, were investigated in this paper. The specimens were sintered at 1290°C and 1350°C in an air atmosphere for two hours. The low doped samples demonstrated the mainly uniform and homogeneous microstructure with average grain sizes ranged from 0.3 μm to 5.0 μm. The appearances of secondary abnormal grains in fine grain matrix and core-shell structure were observed in highly doped Sm/BaTiO3 sintered at 1350°C. Dielectric measurements were carried out as a function of temperature up to 200°C. The low doped samples, sintered at 1350°C, display the high value of dielectric permittivity (εr=6800 ) at room temperature. A nearly flat permittivity-response was obtained in specimens with 5.0 at% additive content. Using a modified Curie-Weiss low the Curie-like constant C´ and a critical exponent γ were calculated. The obtained values of γ pointed out the diffuse phase transformation in heavily doped BaTiO3 samples.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 3rd Serbian Ceramic Society Conference : program and the book of abstracts; September 29 - October 1, 2014; Belgrade",
title = "Influence of Sm2O3 on the Microstructure and Dielectric Characteristics of Codoped BaTiO3 Ceramics",
pages = "62-62",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7488"
}

Paunović, V., Mitić, V. V., Živković, L.,& Kocić, L.. (2014). Influence of Sm2O3 on the Microstructure and Dielectric Characteristics of Codoped BaTiO3 Ceramics. in Advanced Ceramics and Application : 3rd Serbian Ceramic Society Conference : program and the book of abstracts; September 29 - October 1, 2014; Belgrade
Belgrade : Serbian Ceramic Society., 62-62.
https://hdl.handle.net/21.15107/rcub_vinar_7488

Paunović V, Mitić VV, Živković L, Kocić L. Influence of Sm2O3 on the Microstructure and Dielectric Characteristics of Codoped BaTiO3 Ceramics. in Advanced Ceramics and Application : 3rd Serbian Ceramic Society Conference : program and the book of abstracts; September 29 - October 1, 2014; Belgrade. 2014;:62-62.
https://hdl.handle.net/21.15107/rcub_vinar_7488 .

Paunović, Vesna, Mitić, Vojislav V., Živković, Ljiljana, Kocić, Ljubiša, "Influence of Sm2O3 on the Microstructure and Dielectric Characteristics of Codoped BaTiO3 Ceramics" in Advanced Ceramics and Application : 3rd Serbian Ceramic Society Conference : program and the book of abstracts; September 29 - October 1, 2014; Belgrade (2014):62-62,
https://hdl.handle.net/21.15107/rcub_vinar_7488 .

TY  - CONF
AU  - Purenović, Jelena M.
AU  - Mitić, Vojislav V.
AU  - Kocić, Ljubiša
AU  - Ranđelović, Marjan S.
AU  - Matović, Branko
AU  - Purenović, Milovan M.
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/421
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7431
AB  - Porous aluminium-silicate ceramics, modified by alloying with magnesium and microalloying with alluminium belongs to a group of advanced multifunctional ceramics materials. This multiphase solid-solid system has predominantly amorphous microstructure and micro morphology. Intergranular and interphase areas are very complex, because they represent areas, where numbered processes and interactions take place, making new boundaries and regions with fractal nature. Solid contact between grains is actually very complex configuration of microcontacts with fractal nature. Fractal analysis of intergranular microstructure has included application of Minkowski layer. This layer is in correlation with fractal dimension, and defines grains contact probability. It represents convex layer of grains contour roughness and irregularity. Considering the fractal nature of intergranular contacts, it is possible to establish correlation between material electrical properties and fractal analysis, as a tool for future correlation with microstructure characterization.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade
T1  - Application of Minkowski layer for microalloyed alumo-silicate ceramics grains fractal analysis
SP  - 43
EP  - 43
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7431
ER  - 

@conference{
author = "Purenović, Jelena M. and Mitić, Vojislav V. and Kocić, Ljubiša and Ranđelović, Marjan S. and Matović, Branko and Purenović, Milovan M.",
year = "2013",
abstract = "Porous aluminium-silicate ceramics, modified by alloying with magnesium and microalloying with alluminium belongs to a group of advanced multifunctional ceramics materials. This multiphase solid-solid system has predominantly amorphous microstructure and micro morphology. Intergranular and interphase areas are very complex, because they represent areas, where numbered processes and interactions take place, making new boundaries and regions with fractal nature. Solid contact between grains is actually very complex configuration of microcontacts with fractal nature. Fractal analysis of intergranular microstructure has included application of Minkowski layer. This layer is in correlation with fractal dimension, and defines grains contact probability. It represents convex layer of grains contour roughness and irregularity. Considering the fractal nature of intergranular contacts, it is possible to establish correlation between material electrical properties and fractal analysis, as a tool for future correlation with microstructure characterization.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade",
title = "Application of Minkowski layer for microalloyed alumo-silicate ceramics grains fractal analysis",
pages = "43-43",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7431"
}

Purenović, J. M., Mitić, V. V., Kocić, L., Ranđelović, M. S., Matović, B.,& Purenović, M. M.. (2013). Application of Minkowski layer for microalloyed alumo-silicate ceramics grains fractal analysis. in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade
Belgrade : Serbian Ceramic Society., 43-43.
https://hdl.handle.net/21.15107/rcub_vinar_7431

Purenović JM, Mitić VV, Kocić L, Ranđelović MS, Matović B, Purenović MM. Application of Minkowski layer for microalloyed alumo-silicate ceramics grains fractal analysis. in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade. 2013;:43-43.
https://hdl.handle.net/21.15107/rcub_vinar_7431 .

Purenović, Jelena M., Mitić, Vojislav V., Kocić, Ljubiša, Ranđelović, Marjan S., Matović, Branko, Purenović, Milovan M., "Application of Minkowski layer for microalloyed alumo-silicate ceramics grains fractal analysis" in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade (2013):43-43,
https://hdl.handle.net/21.15107/rcub_vinar_7431 .