The influence of mechanical activation on structural evolution of nanocrystalline SrTiO3 powders
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2017
Authors
Zivojinovic, JelenaPavlović, Vera P.

Kosanovic, Darko
Marković, Smilja B.

Krstić, Jugoslav

Blagojevic, Vladimir A.
Pavlović, Vladimir B.

Article (Published version)

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Structural changes caused by mechanical activation of SrTiO3 powders were investigated using a variety of methods. Average crystallite size continuously decreased with increased activation time to around 20 nm after 120 min activation, while mesopore volume and specific surface area increased accordingly. Higher activation times lead to increased agglomeration of nanoparticles to form agglomerates of around 2 mu m in size, ultimately producing a relatively stable powder, which exhibits lower microstrain than powders activated for shorter periods of time. Raman spectroscopy shows that the behavior of TO2 and TO4 modes is consistent with a decrease in particle size, while behavior of the nonpolar TO3 mode is markedly different, indicating relaxation of the inversion symmetry in polycrystalline SrTiO3. UV-VIS spectra show that mechanical activation has negligible effect on SrTiO3, with a slight shift caused by TiO2 contamination due to presence of air. Other than this, the mechanical acti...vation process preserves the chemical purity of the initial powder.
Keywords:
mechanical activation / SrTiO3 / Microstructure / Ball milling / Size dependenceSource:
Journal of Alloys and Compounds, 2017, 695, 863-870Publisher:
- Elsevier
Funding / projects:
Note:
- The peer-reviewed version: http://cer.ihtm.bg.ac.rs/handle/123456789/3016
DOI: 10.1016/j.jallcom.2016.10.159
ISSN: 0925-8388
WoS: 000391817600104
Scopus: 2-s2.0-85005917614
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IHTMTY - JOUR AU - Zivojinovic, Jelena AU - Pavlović, Vera P. AU - Kosanovic, Darko AU - Marković, Smilja B. AU - Krstić, Jugoslav AU - Blagojevic, Vladimir A. AU - Pavlović, Vladimir B. PY - 2017 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/2067 AB - Structural changes caused by mechanical activation of SrTiO3 powders were investigated using a variety of methods. Average crystallite size continuously decreased with increased activation time to around 20 nm after 120 min activation, while mesopore volume and specific surface area increased accordingly. Higher activation times lead to increased agglomeration of nanoparticles to form agglomerates of around 2 mu m in size, ultimately producing a relatively stable powder, which exhibits lower microstrain than powders activated for shorter periods of time. Raman spectroscopy shows that the behavior of TO2 and TO4 modes is consistent with a decrease in particle size, while behavior of the nonpolar TO3 mode is markedly different, indicating relaxation of the inversion symmetry in polycrystalline SrTiO3. UV-VIS spectra show that mechanical activation has negligible effect on SrTiO3, with a slight shift caused by TiO2 contamination due to presence of air. Other than this, the mechanical activation process preserves the chemical purity of the initial powder. PB - Elsevier T2 - Journal of Alloys and Compounds T1 - The influence of mechanical activation on structural evolution of nanocrystalline SrTiO3 powders VL - 695 SP - 863 EP - 870 DO - 10.1016/j.jallcom.2016.10.159 ER -
@article{ author = "Zivojinovic, Jelena and Pavlović, Vera P. and Kosanovic, Darko and Marković, Smilja B. and Krstić, Jugoslav and Blagojevic, Vladimir A. and Pavlović, Vladimir B.", year = "2017", abstract = "Structural changes caused by mechanical activation of SrTiO3 powders were investigated using a variety of methods. Average crystallite size continuously decreased with increased activation time to around 20 nm after 120 min activation, while mesopore volume and specific surface area increased accordingly. Higher activation times lead to increased agglomeration of nanoparticles to form agglomerates of around 2 mu m in size, ultimately producing a relatively stable powder, which exhibits lower microstrain than powders activated for shorter periods of time. Raman spectroscopy shows that the behavior of TO2 and TO4 modes is consistent with a decrease in particle size, while behavior of the nonpolar TO3 mode is markedly different, indicating relaxation of the inversion symmetry in polycrystalline SrTiO3. UV-VIS spectra show that mechanical activation has negligible effect on SrTiO3, with a slight shift caused by TiO2 contamination due to presence of air. Other than this, the mechanical activation process preserves the chemical purity of the initial powder.", publisher = "Elsevier", journal = "Journal of Alloys and Compounds", title = "The influence of mechanical activation on structural evolution of nanocrystalline SrTiO3 powders", volume = "695", pages = "863-870", doi = "10.1016/j.jallcom.2016.10.159" }
Zivojinovic, J., Pavlović, V. P., Kosanovic, D., Marković, S. B., Krstić, J., Blagojevic, V. A.,& Pavlović, V. B.. (2017). The influence of mechanical activation on structural evolution of nanocrystalline SrTiO3 powders. in Journal of Alloys and Compounds Elsevier., 695, 863-870. https://doi.org/10.1016/j.jallcom.2016.10.159
Zivojinovic J, Pavlović VP, Kosanovic D, Marković SB, Krstić J, Blagojevic VA, Pavlović VB. The influence of mechanical activation on structural evolution of nanocrystalline SrTiO3 powders. in Journal of Alloys and Compounds. 2017;695:863-870. doi:10.1016/j.jallcom.2016.10.159 .
Zivojinovic, Jelena, Pavlović, Vera P., Kosanovic, Darko, Marković, Smilja B., Krstić, Jugoslav, Blagojevic, Vladimir A., Pavlović, Vladimir B., "The influence of mechanical activation on structural evolution of nanocrystalline SrTiO3 powders" in Journal of Alloys and Compounds, 695 (2017):863-870, https://doi.org/10.1016/j.jallcom.2016.10.159 . .