The influence of mechanical activation on structural evolution of nanocrystalline SrTiO3 powders
Authorized Users Only
2017
Authors
Živojinović, Jelena
Pavlović, Vera P.

Kosanović, Darko

Marković, Smilja

Krstić, Jugoslav

Blagojević, Vladimir A.

Pavlović, Vladimir B.

Article (Published version)

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Show full item recordAbstract
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 μm 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 activa...tion 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:
- Peer-reviewed manuscript: https://hdl.handle.net/21.15107/rcub_dais_4617
DOI: 10.1016/j.jallcom.2016.10.159
ISSN: 0925-8388
WoS: 000391817600104
Scopus: 2-s2.0-85005917614
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Živojinović, Jelena AU - Pavlović, Vera P. AU - Kosanović, Darko AU - Marković, Smilja AU - Krstić, Jugoslav AU - Blagojević, Vladimir A. AU - Pavlović, Vladimir B. PY - 2017 UR - https://dais.sanu.ac.rs/123456789/2355 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 μm 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 SP - 863 EP - 870 VL - 695 DO - 10.1016/j.jallcom.2016.10.159 UR - https://hdl.handle.net/21.15107/rcub_dais_2355 ER -
@article{ author = "Živojinović, Jelena and Pavlović, Vera P. and Kosanović, Darko and Marković, Smilja and Krstić, Jugoslav and Blagojević, 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 μm 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", pages = "863-870", volume = "695", doi = "10.1016/j.jallcom.2016.10.159", url = "https://hdl.handle.net/21.15107/rcub_dais_2355" }
Živojinović, J., Pavlović, V. P., Kosanović, D., Marković, S., Krstić, J., Blagojević, 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 https://hdl.handle.net/21.15107/rcub_dais_2355
Živojinović J, Pavlović VP, Kosanović D, Marković S, Krstić J, Blagojević 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 https://hdl.handle.net/21.15107/rcub_dais_2355 .
Živojinović, Jelena, Pavlović, Vera P., Kosanović, Darko, Marković, Smilja, Krstić, Jugoslav, Blagojević, 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 ., https://hdl.handle.net/21.15107/rcub_dais_2355 .