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  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, N.
AU  - Krstić, J.
AU  - Scepanović, M.
AU  - Pavlović, Vladimir
AU  - Paunović, V.
AU  - Ristić, M.M.
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3296
AB  - In this article the influence of ball miling process on structure of MgO-TiO2 system, as well as the electrical properties of samples after sintering, was investigated. The mixtures of MgO-TiO2 powders were mechanically activated in a planetary ball mill for the time period from 0 to 120 min. The influence of mechanical activation and sintering on the lattice vibrational spectra was studied by Raman spectroscopy at room temperature. Structural investigations have been performed on produced powders. Nitrogen adsorption method was used to determine the BET specific surface area and pore size distribution. Unusual results have been obtained: specific surface area continuosly decreased up to 40 min of activation and increased after that, reaching its minimun value of 5.5 m(2)/g. The Raman spectra of activated powders have shown that anatase modes have been decreasing in intensity and broadening as the time of activation extended. Also, the additional modes attributed to TiO2 II, srilankite and rutile phases started to appear as a consequence of activation. The small differences noticed in the Raman spectra of sintered samples have been explained by structural modification of MgTiO3 phase due to the presence of defects. The effects of activation and sintering process on microstructure were investigated by scanning electron microscopy (SEM). The electrical measurements showed difference in dielectric constant (epsilon(r)), loss tangent (tg delta) and specific resistance (rho) as a function of time of mechanical treatment.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Structural characterization and electrical properties of sintered magnesium-titanate ceramics
EP  - 44
SP  - 39
VL  - 555
DO  - 10.1016/j.jallcom.2012.12.040
ER  - 

@article{
author = "Filipović, Suzana and Obradović, N. and Krstić, J. and Scepanović, M. and Pavlović, Vladimir and Paunović, V. and Ristić, M.M.",
year = "2013",
abstract = "In this article the influence of ball miling process on structure of MgO-TiO2 system, as well as the electrical properties of samples after sintering, was investigated. The mixtures of MgO-TiO2 powders were mechanically activated in a planetary ball mill for the time period from 0 to 120 min. The influence of mechanical activation and sintering on the lattice vibrational spectra was studied by Raman spectroscopy at room temperature. Structural investigations have been performed on produced powders. Nitrogen adsorption method was used to determine the BET specific surface area and pore size distribution. Unusual results have been obtained: specific surface area continuosly decreased up to 40 min of activation and increased after that, reaching its minimun value of 5.5 m(2)/g. The Raman spectra of activated powders have shown that anatase modes have been decreasing in intensity and broadening as the time of activation extended. Also, the additional modes attributed to TiO2 II, srilankite and rutile phases started to appear as a consequence of activation. The small differences noticed in the Raman spectra of sintered samples have been explained by structural modification of MgTiO3 phase due to the presence of defects. The effects of activation and sintering process on microstructure were investigated by scanning electron microscopy (SEM). The electrical measurements showed difference in dielectric constant (epsilon(r)), loss tangent (tg delta) and specific resistance (rho) as a function of time of mechanical treatment.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Structural characterization and electrical properties of sintered magnesium-titanate ceramics",
pages = "44-39",
volume = "555",
doi = "10.1016/j.jallcom.2012.12.040"
}

Filipović, S., Obradović, N., Krstić, J., Scepanović, M., Pavlović, V., Paunović, V.,& Ristić, M.M.. (2013). Structural characterization and electrical properties of sintered magnesium-titanate ceramics. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 555, 39-44.
https://doi.org/10.1016/j.jallcom.2012.12.040

Filipović S, Obradović N, Krstić J, Scepanović M, Pavlović V, Paunović V, Ristić M. Structural characterization and electrical properties of sintered magnesium-titanate ceramics. in Journal of Alloys and Compounds. 2013;555:39-44.
doi:10.1016/j.jallcom.2012.12.040 .

Filipović, Suzana, Obradović, N., Krstić, J., Scepanović, M., Pavlović, Vladimir, Paunović, V., Ristić, M.M., "Structural characterization and electrical properties of sintered magnesium-titanate ceramics" in Journal of Alloys and Compounds, 555 (2013):39-44,
https://doi.org/10.1016/j.jallcom.2012.12.040 . .

TY  - JOUR
AU  - Pavlović, Vera P.
AU  - Krstić, J.
AU  - Scepanović, M.J.
AU  - Dojcilović, J.
AU  - Minić, Dragica M.
AU  - Blanusa, J.
AU  - Stevanović, S.
AU  - Mitić, V.
AU  - Pavlović, Vladimir
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2668
AB  - In this article, in order to obtain tetragonal nanocrystalline BaTiO3, structural investigations of mechanically activated BaTiO3 powder have been performed. A mercury porosimetry analysis and scanning electron microscopy method have been applied for determination of the specific pore volume, porosity and microstructure morphology of the samples. The lattice vibration spectra of nonactivated and activated powders, their phase composition, lattice microstrains and the mean size of coherently diffracting domains were examined by Raman spectroscopy and the X-ray powder diffraction method. The average crystal structure of obtained nanocrystalline powders, estimated from X-ray diffraction data, gave evidence of retained, but slightly sustained tetragonality of powders, even for particles as small as similar to 30 nm. Raman spectroscopy also gave clear evidence for local tetragonal symmetries, in particular through the presence of a band at similar to 307 cm(-1).
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Structural investigation of mechanically activated nanocrystalline BaTiO3 powders
EP  - 2518
IS  - 7
SP  - 2513
VL  - 37
DO  - 10.1016/j.ceramint.2011.03.064
ER  - 

@article{
author = "Pavlović, Vera P. and Krstić, J. and Scepanović, M.J. and Dojcilović, J. and Minić, Dragica M. and Blanusa, J. and Stevanović, S. and Mitić, V. and Pavlović, Vladimir",
year = "2011",
abstract = "In this article, in order to obtain tetragonal nanocrystalline BaTiO3, structural investigations of mechanically activated BaTiO3 powder have been performed. A mercury porosimetry analysis and scanning electron microscopy method have been applied for determination of the specific pore volume, porosity and microstructure morphology of the samples. The lattice vibration spectra of nonactivated and activated powders, their phase composition, lattice microstrains and the mean size of coherently diffracting domains were examined by Raman spectroscopy and the X-ray powder diffraction method. The average crystal structure of obtained nanocrystalline powders, estimated from X-ray diffraction data, gave evidence of retained, but slightly sustained tetragonality of powders, even for particles as small as similar to 30 nm. Raman spectroscopy also gave clear evidence for local tetragonal symmetries, in particular through the presence of a band at similar to 307 cm(-1).",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Structural investigation of mechanically activated nanocrystalline BaTiO3 powders",
pages = "2518-2513",
number = "7",
volume = "37",
doi = "10.1016/j.ceramint.2011.03.064"
}

Pavlović, V. P., Krstić, J., Scepanović, M.J., Dojcilović, J., Minić, D. M., Blanusa, J., Stevanović, S., Mitić, V.,& Pavlović, V.. (2011). Structural investigation of mechanically activated nanocrystalline BaTiO3 powders. in Ceramics International
Elsevier Sci Ltd, Oxford., 37(7), 2513-2518.
https://doi.org/10.1016/j.ceramint.2011.03.064

Pavlović VP, Krstić J, Scepanović M, Dojcilović J, Minić DM, Blanusa J, Stevanović S, Mitić V, Pavlović V. Structural investigation of mechanically activated nanocrystalline BaTiO3 powders. in Ceramics International. 2011;37(7):2513-2518.
doi:10.1016/j.ceramint.2011.03.064 .

Pavlović, Vera P., Krstić, J., Scepanović, M.J., Dojcilović, J., Minić, Dragica M., Blanusa, J., Stevanović, S., Mitić, V., Pavlović, Vladimir, "Structural investigation of mechanically activated nanocrystalline BaTiO3 powders" in Ceramics International, 37, no. 7 (2011):2513-2518,
https://doi.org/10.1016/j.ceramint.2011.03.064 . .