TY  - JOUR
AU  - Terzić, Anja
AU  - Pezo, Lato
AU  - Andrić, Ljubiša
AU  - Pavlović, Vladimir
AU  - Mitić, Vojislav V.
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4373
AB  - The properties of seven montmorillonite-rich bentonites of different geological origin were investigated prior and subsequent to mechano-chemical processing in an ultra-centrifugal mill. The objective of the experiment was altering the bentonite types and activation parameters in order to determine the optimal milling conditions that produce material which is physico-mechanically and microstructurally applicable as a binder replacement and sorbent in the construction composites. The efficiency of bentonite activation was assessed by chemometrics and Artificial neural networks mathematical modeling. Principal component analysis and analysis of variance were used in the observation of the influence of input variables (bentonite chemical composition) and process parameters (milling duration, rotor velocity) on the product characteristics: density, specific surface area, grain size and distribution, cation exchange capacity, melting point, compressive strength, shrinkage and porosity. When the ANN models for the observed responses, related to predicted bentonite characteristics and quality, were compared to experimental results, they correctly predicted the responses. The processed data also adequately fitted to the regression second order polynomial models. The SOP models, which showed r(2) values from 0.357 to 0.948, and were able to predict the observed responses in a wide range of processing parameters, while ANN models performed high prediction accuracy (0.776-0.901) and can be considered as precise for response variables prediction. The combination of the conducted mathematical analyses showed that that increase/decrease in output values was stabilized after 30 min of activation. Mathematically attained interpretations were correlated with the results of the instrumental analyses (XRD, DTA/TG, SEM) to confirm the adoption of B6 bentonite as a preferable type and 30 min as an optimal milling time for acquiring quality of clay powder that will be used in structural and thermal applications.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling
EP  - 2562
IS  - 2
SP  - 2549
VL  - 43
DO  - 10.1016/j.ceramint.2016.11.058
ER  - 

@article{
author = "Terzić, Anja and Pezo, Lato and Andrić, Ljubiša and Pavlović, Vladimir and Mitić, Vojislav V.",
year = "2017",
abstract = "The properties of seven montmorillonite-rich bentonites of different geological origin were investigated prior and subsequent to mechano-chemical processing in an ultra-centrifugal mill. The objective of the experiment was altering the bentonite types and activation parameters in order to determine the optimal milling conditions that produce material which is physico-mechanically and microstructurally applicable as a binder replacement and sorbent in the construction composites. The efficiency of bentonite activation was assessed by chemometrics and Artificial neural networks mathematical modeling. Principal component analysis and analysis of variance were used in the observation of the influence of input variables (bentonite chemical composition) and process parameters (milling duration, rotor velocity) on the product characteristics: density, specific surface area, grain size and distribution, cation exchange capacity, melting point, compressive strength, shrinkage and porosity. When the ANN models for the observed responses, related to predicted bentonite characteristics and quality, were compared to experimental results, they correctly predicted the responses. The processed data also adequately fitted to the regression second order polynomial models. The SOP models, which showed r(2) values from 0.357 to 0.948, and were able to predict the observed responses in a wide range of processing parameters, while ANN models performed high prediction accuracy (0.776-0.901) and can be considered as precise for response variables prediction. The combination of the conducted mathematical analyses showed that that increase/decrease in output values was stabilized after 30 min of activation. Mathematically attained interpretations were correlated with the results of the instrumental analyses (XRD, DTA/TG, SEM) to confirm the adoption of B6 bentonite as a preferable type and 30 min as an optimal milling time for acquiring quality of clay powder that will be used in structural and thermal applications.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling",
pages = "2562-2549",
number = "2",
volume = "43",
doi = "10.1016/j.ceramint.2016.11.058"
}

Terzić, A., Pezo, L., Andrić, L., Pavlović, V.,& Mitić, V. V.. (2017). Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling. in Ceramics International
Elsevier Sci Ltd, Oxford., 43(2), 2549-2562.
https://doi.org/10.1016/j.ceramint.2016.11.058

Terzić A, Pezo L, Andrić L, Pavlović V, Mitić VV. Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling. in Ceramics International. 2017;43(2):2549-2562.
doi:10.1016/j.ceramint.2016.11.058 .

Terzić, Anja, Pezo, Lato, Andrić, Ljubiša, Pavlović, Vladimir, Mitić, Vojislav V., "Optimization of bentonite clay mechano-chemical activation using artificial neural network modeling" in Ceramics International, 43, no. 2 (2017):2549-2562,
https://doi.org/10.1016/j.ceramint.2016.11.058 . .

TY  - JOUR
AU  - Pavlović, Vera P.
AU  - Nikolić, Maria V.
AU  - Pavlović, Vladimir
AU  - Blanusa, Jovan
AU  - Stevanović, Suzana
AU  - Mitić, Vojislav V.
AU  - Scepanović, Maja
AU  - Vlahović, Branislav
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3495
AB  - The structure and lattice dynamics of mechanically activated BaTiO3 was investigated in this study. Phonon behavior and crystal structure stability of the obtained nanocrystalline BaTiO3 were discussed from the view point of crystallite size effects and microstrains induced by mechanical activation. A systematic study of Raman responses indicates that mechanical activation has a distinct influence on BaTiO3 lattice spectra affecting the intensity, width, and position of Raman modes. The measured Raman spectra were deconvoluted and phonon parameters were estimated. It has been established that applied mechanical activation leads to a significant decrease in the mean crystallites size, but nevertheless enables formation of tetragonal nanocrystalline BaTiO3.
PB  - Wiley, Hoboken
T2  - Journal of the American Ceramic Society
T1  - Raman Responses in Mechanically Activated BaTiO3
EP  - 608
IS  - 2
SP  - 601
VL  - 97
DO  - 10.1111/jace.12423
ER  - 

@article{
author = "Pavlović, Vera P. and Nikolić, Maria V. and Pavlović, Vladimir and Blanusa, Jovan and Stevanović, Suzana and Mitić, Vojislav V. and Scepanović, Maja and Vlahović, Branislav",
year = "2014",
abstract = "The structure and lattice dynamics of mechanically activated BaTiO3 was investigated in this study. Phonon behavior and crystal structure stability of the obtained nanocrystalline BaTiO3 were discussed from the view point of crystallite size effects and microstrains induced by mechanical activation. A systematic study of Raman responses indicates that mechanical activation has a distinct influence on BaTiO3 lattice spectra affecting the intensity, width, and position of Raman modes. The measured Raman spectra were deconvoluted and phonon parameters were estimated. It has been established that applied mechanical activation leads to a significant decrease in the mean crystallites size, but nevertheless enables formation of tetragonal nanocrystalline BaTiO3.",
publisher = "Wiley, Hoboken",
journal = "Journal of the American Ceramic Society",
title = "Raman Responses in Mechanically Activated BaTiO3",
pages = "608-601",
number = "2",
volume = "97",
doi = "10.1111/jace.12423"
}

Pavlović, V. P., Nikolić, M. V., Pavlović, V., Blanusa, J., Stevanović, S., Mitić, V. V., Scepanović, M.,& Vlahović, B.. (2014). Raman Responses in Mechanically Activated BaTiO3. in Journal of the American Ceramic Society
Wiley, Hoboken., 97(2), 601-608.
https://doi.org/10.1111/jace.12423

Pavlović VP, Nikolić MV, Pavlović V, Blanusa J, Stevanović S, Mitić VV, Scepanović M, Vlahović B. Raman Responses in Mechanically Activated BaTiO3. in Journal of the American Ceramic Society. 2014;97(2):601-608.
doi:10.1111/jace.12423 .

Pavlović, Vera P., Nikolić, Maria V., Pavlović, Vladimir, Blanusa, Jovan, Stevanović, Suzana, Mitić, Vojislav V., Scepanović, Maja, Vlahović, Branislav, "Raman Responses in Mechanically Activated BaTiO3" in Journal of the American Ceramic Society, 97, no. 2 (2014):601-608,
https://doi.org/10.1111/jace.12423 . .

TY  - CONF
AU  - Mitić, Vojislav V.
AU  - Paunović, Vesna
AU  - Kocić, Ljubiša
AU  - Janković, S.
AU  - Pavlović, Vladimir B.
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/410
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5670
AB  - The intergrain ceramic structures are very complex and difficult to describe by using traditional analytical methods. In this study, in order to establish grain shapes of sintered ceramics, new approach on correlation between microstructure and properties of doped BaTiO3 -ceramics based on fractal geometry has been developed. BaTiO3 ceramics doped with CeO2, Bi2O3, Fe2O3, CaZrO3 Nb2O5, MnCO3 , La2O3, Er2O3, Yb2O3 and Ho2O3, were prepared using conventional solid state procedure and sintered at 1350°C. The sintered specimens microstructure was investigated by SEM-5300 and capacitance has been done using LCR-metra Agilent 4284A. The fractal modeling method using a reconstruction of microstructure configurations, like grains or intergranular contacts shapes has been successfully done. Furthermore, the area of grains surface was calculated by using fractal correction which expresses the grains surface irregularity through fractal dimension. For better and deeper the ceramics material microstructure characterization the Voronoi model and mathematical statistics calculations, are applied, also. The fractal nature for ceramics structure analysis providing a new ideas for modeling the grain shape and relations between the BaTiO3 ceramic structure and dielectrical properties and new frontier for higher integration on electronic circuits. The presented results indicate that fractal method for structure ceramics analysis creates a new approach for describing, predicting and modeling the grain shape and relations between the BaTiO3 -ceramic structure and dielectric and generally electric and microelectronics properties.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade
T1  - Microelectronics miniaturization and fractal electronic frontiers
EP  - 15
SP  - 15
UR  - https://hdl.handle.net/21.15107/rcub_dais_410
ER  - 

@conference{
author = "Mitić, Vojislav V. and Paunović, Vesna and Kocić, Ljubiša and Janković, S. and Pavlović, Vladimir B.",
year = "2013",
abstract = "The intergrain ceramic structures are very complex and difficult to describe by using traditional analytical methods. In this study, in order to establish grain shapes of sintered ceramics, new approach on correlation between microstructure and properties of doped BaTiO3 -ceramics based on fractal geometry has been developed. BaTiO3 ceramics doped with CeO2, Bi2O3, Fe2O3, CaZrO3 Nb2O5, MnCO3 , La2O3, Er2O3, Yb2O3 and Ho2O3, were prepared using conventional solid state procedure and sintered at 1350°C. The sintered specimens microstructure was investigated by SEM-5300 and capacitance has been done using LCR-metra Agilent 4284A. The fractal modeling method using a reconstruction of microstructure configurations, like grains or intergranular contacts shapes has been successfully done. Furthermore, the area of grains surface was calculated by using fractal correction which expresses the grains surface irregularity through fractal dimension. For better and deeper the ceramics material microstructure characterization the Voronoi model and mathematical statistics calculations, are applied, also. The fractal nature for ceramics structure analysis providing a new ideas for modeling the grain shape and relations between the BaTiO3 ceramic structure and dielectrical properties and new frontier for higher integration on electronic circuits. The presented results indicate that fractal method for structure ceramics analysis creates a new approach for describing, predicting and modeling the grain shape and relations between the BaTiO3 -ceramic structure and dielectric and generally electric and microelectronics properties.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade",
title = "Microelectronics miniaturization and fractal electronic frontiers",
pages = "15-15",
url = "https://hdl.handle.net/21.15107/rcub_dais_410"
}

Mitić, V. V., Paunović, V., Kocić, L., Janković, S.,& Pavlović, V. B.. (2013). Microelectronics miniaturization and fractal electronic frontiers. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade
Belgrade : Serbian Ceramic Society., 15-15.
https://hdl.handle.net/21.15107/rcub_dais_410

Mitić VV, Paunović V, Kocić L, Janković S, Pavlović VB. Microelectronics miniaturization and fractal electronic frontiers. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade. 2013;:15-15.
https://hdl.handle.net/21.15107/rcub_dais_410 .

Mitić, Vojislav V., Paunović, Vesna, Kocić, Ljubiša, Janković, S., Pavlović, Vladimir B., "Microelectronics miniaturization and fractal electronic frontiers" in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade (2013):15-15,
https://hdl.handle.net/21.15107/rcub_dais_410 .

TY  - CONF
AU  - Mitić, Vojislav V.
AU  - Paunović, Vesna
AU  - Kocić, Ljubiša
AU  - Janković, S.
AU  - Pavlović, Vladimir B.
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/518
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5684
AB  - Since that the scientific and technological efforts to further miniaturization, "better packaging" and higher levels of integration of electronic components and subsystems, and modern microelectronics devices are increasingly limited, the new field of scientific views and perspectives in previously presented scientific work, contribute and create new solutions of electronics and materials science higher unity with the goal to be recognized the desired functions and highly integrated electronic properties with in the different microstructures levels. In this study, in order to establish grain shapes of sintered ceramics, new approach on correlation between microstructure and properties of rare-earth doped BaTiO3 -ceramics based on fractal geometry, related to intergranular contact surfaces and mathematical statistics calculations has been developed. BaTiO3-ceramics doped with different additives (Mn, La, Er, Yb, Ho,) were prepared using conventional solid state procedure and sintered at 1320C. The microstructure of specimens was investigated by SEM-5300 and capacitance has been done using LCR-meter Agilent 4284A. By using fractal modeling method of microstructure configurations reconstruction, like shapes of grains or intergranular contacts has been successfully done. Furthermore, the area of grains surface was calculated using fractal correction that expresses the irregularity of grains surface through fractal dimension For better and deeper characterization of the ceramics material microstructure the Voronoi model, mathematical statistics calculations, microstructure analysis on vertical view od the fracture between two pieces of samples, and contact surfaces analysis between the particles and grains, are applied The presented results indicate that fractal method for analysis of the structure of ceramics provides a new approach for describing, predicting and modeling the grain shape and relations between the BaTiO3 -ceramic structure and dielectrical properties.
PB  - Belgrade : Serbian Ceramic Society
C3  - The First Serbian Ceramic Society Conference "Advanced Ceramics and Application" May 10-11, 2012: Program and the Book of Abstracts
T1  - New Frontiers: Miniaturization and Higher Level BaTiO3 -Ceramics Microelectronics Circuits Integration
EP  - 6
SP  - 6
UR  - https://hdl.handle.net/21.15107/rcub_dais_518
ER  - 

@conference{
author = "Mitić, Vojislav V. and Paunović, Vesna and Kocić, Ljubiša and Janković, S. and Pavlović, Vladimir B.",
year = "2012",
abstract = "Since that the scientific and technological efforts to further miniaturization, "better packaging" and higher levels of integration of electronic components and subsystems, and modern microelectronics devices are increasingly limited, the new field of scientific views and perspectives in previously presented scientific work, contribute and create new solutions of electronics and materials science higher unity with the goal to be recognized the desired functions and highly integrated electronic properties with in the different microstructures levels. In this study, in order to establish grain shapes of sintered ceramics, new approach on correlation between microstructure and properties of rare-earth doped BaTiO3 -ceramics based on fractal geometry, related to intergranular contact surfaces and mathematical statistics calculations has been developed. BaTiO3-ceramics doped with different additives (Mn, La, Er, Yb, Ho,) were prepared using conventional solid state procedure and sintered at 1320C. The microstructure of specimens was investigated by SEM-5300 and capacitance has been done using LCR-meter Agilent 4284A. By using fractal modeling method of microstructure configurations reconstruction, like shapes of grains or intergranular contacts has been successfully done. Furthermore, the area of grains surface was calculated using fractal correction that expresses the irregularity of grains surface through fractal dimension For better and deeper characterization of the ceramics material microstructure the Voronoi model, mathematical statistics calculations, microstructure analysis on vertical view od the fracture between two pieces of samples, and contact surfaces analysis between the particles and grains, are applied The presented results indicate that fractal method for analysis of the structure of ceramics provides a new approach for describing, predicting and modeling the grain shape and relations between the BaTiO3 -ceramic structure and dielectrical properties.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "The First Serbian Ceramic Society Conference "Advanced Ceramics and Application" May 10-11, 2012: Program and the Book of Abstracts",
title = "New Frontiers: Miniaturization and Higher Level BaTiO3 -Ceramics Microelectronics Circuits Integration",
pages = "6-6",
url = "https://hdl.handle.net/21.15107/rcub_dais_518"
}

Mitić, V. V., Paunović, V., Kocić, L., Janković, S.,& Pavlović, V. B.. (2012). New Frontiers: Miniaturization and Higher Level BaTiO3 -Ceramics Microelectronics Circuits Integration. in The First Serbian Ceramic Society Conference "Advanced Ceramics and Application" May 10-11, 2012: Program and the Book of Abstracts
Belgrade : Serbian Ceramic Society., 6-6.
https://hdl.handle.net/21.15107/rcub_dais_518

Mitić VV, Paunović V, Kocić L, Janković S, Pavlović VB. New Frontiers: Miniaturization and Higher Level BaTiO3 -Ceramics Microelectronics Circuits Integration. in The First Serbian Ceramic Society Conference "Advanced Ceramics and Application" May 10-11, 2012: Program and the Book of Abstracts. 2012;:6-6.
https://hdl.handle.net/21.15107/rcub_dais_518 .

Mitić, Vojislav V., Paunović, Vesna, Kocić, Ljubiša, Janković, S., Pavlović, Vladimir B., "New Frontiers: Miniaturization and Higher Level BaTiO3 -Ceramics Microelectronics Circuits Integration" in The First Serbian Ceramic Society Conference "Advanced Ceramics and Application" May 10-11, 2012: Program and the Book of Abstracts (2012):6-6,
https://hdl.handle.net/21.15107/rcub_dais_518 .

TY  - JOUR
AU  - Mitić, Vojislav V.
AU  - Nikolić, Zoran S.
AU  - Pavlović, Vladimir
AU  - Paunović, Vesna
AU  - Miljković, Miroslav
AU  - Jordović, Branka
AU  - Zivković, Ljiljana
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2372
AB  - In this article, ytterbium and erbium oxides are used as doping materials for barium titanate (BaTiO(3)) materials. The amphoteric behavior of these rare-earth ions leads to the increase of dielectric permittivity and decrease of dielectric losses. BaTiO(3) ceramics doped with 0.01-0.5 wt% of Yb(2)O(3) and Er(2)O(3) were prepared by conventional solid-state procedure and sintered at 1320 degrees C for 4 h. In BaTiO(3) doped with a low content of rare-earth ions (0.01 wt%) the grain size ranged between 10 and 25 pm. With the higher dopant concentration of 0.5 wt%, the abnormal grain growth is inhibited and the grain size ranged between 2 and 10 mu m. The measurements of capacitance and dielectric losses as a function of frequency and temperature have been carried out in order to correlate the microstructure and dielectric properties of doped BaTiO(3) ceramics. The temperature dependence of the dielectric constant as a function of dopant amount has been investigated.
PB  - Wiley-Blackwell Publishing, Inc, Malden
T2  - Journal of the American Ceramic Society
T1  - Influence of Rare-Earth Dopants on Barium Titanate Ceramics Microstructure and Corresponding Electrical Properties
EP  - 137
IS  - 1
SP  - 132
VL  - 93
DO  - 10.1111/j.1551-2916.2009.03309.x
ER  - 

@article{
author = "Mitić, Vojislav V. and Nikolić, Zoran S. and Pavlović, Vladimir and Paunović, Vesna and Miljković, Miroslav and Jordović, Branka and Zivković, Ljiljana",
year = "2010",
abstract = "In this article, ytterbium and erbium oxides are used as doping materials for barium titanate (BaTiO(3)) materials. The amphoteric behavior of these rare-earth ions leads to the increase of dielectric permittivity and decrease of dielectric losses. BaTiO(3) ceramics doped with 0.01-0.5 wt% of Yb(2)O(3) and Er(2)O(3) were prepared by conventional solid-state procedure and sintered at 1320 degrees C for 4 h. In BaTiO(3) doped with a low content of rare-earth ions (0.01 wt%) the grain size ranged between 10 and 25 pm. With the higher dopant concentration of 0.5 wt%, the abnormal grain growth is inhibited and the grain size ranged between 2 and 10 mu m. The measurements of capacitance and dielectric losses as a function of frequency and temperature have been carried out in order to correlate the microstructure and dielectric properties of doped BaTiO(3) ceramics. The temperature dependence of the dielectric constant as a function of dopant amount has been investigated.",
publisher = "Wiley-Blackwell Publishing, Inc, Malden",
journal = "Journal of the American Ceramic Society",
title = "Influence of Rare-Earth Dopants on Barium Titanate Ceramics Microstructure and Corresponding Electrical Properties",
pages = "137-132",
number = "1",
volume = "93",
doi = "10.1111/j.1551-2916.2009.03309.x"
}

Mitić, V. V., Nikolić, Z. S., Pavlović, V., Paunović, V., Miljković, M., Jordović, B.,& Zivković, L.. (2010). Influence of Rare-Earth Dopants on Barium Titanate Ceramics Microstructure and Corresponding Electrical Properties. in Journal of the American Ceramic Society
Wiley-Blackwell Publishing, Inc, Malden., 93(1), 132-137.
https://doi.org/10.1111/j.1551-2916.2009.03309.x

Mitić VV, Nikolić ZS, Pavlović V, Paunović V, Miljković M, Jordović B, Zivković L. Influence of Rare-Earth Dopants on Barium Titanate Ceramics Microstructure and Corresponding Electrical Properties. in Journal of the American Ceramic Society. 2010;93(1):132-137.
doi:10.1111/j.1551-2916.2009.03309.x .

Mitić, Vojislav V., Nikolić, Zoran S., Pavlović, Vladimir, Paunović, Vesna, Miljković, Miroslav, Jordović, Branka, Zivković, Ljiljana, "Influence of Rare-Earth Dopants on Barium Titanate Ceramics Microstructure and Corresponding Electrical Properties" in Journal of the American Ceramic Society, 93, no. 1 (2010):132-137,
https://doi.org/10.1111/j.1551-2916.2009.03309.x . .