Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics
2022
Authors
Živojinović, JelenaKosanović, Darko
Blagojević, Vladimir A.
Pavlović, Vera P.
Tadić, Nenad
Vlahović, Branislav
Pavlović, Vladimir B.
Article (Published version)
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Show full item recordAbstract
In this study, microstructure evolution and dielectric properties of SrTiO3 ceramic have been investigated, whereby mechanical activation of SrTiO3 powders was used to modify the functional properties of ceramic materials. Microstructural SEM analysis of SrTiO3 ceramics showed that the increase in mechanical activation time results in less porous samples. Raman spectroscopy indicated changes in the broadening and asymmetry of the TO2 mode with a change in the time of mechanical activation. TO2 mode showed a Fano asymmetry due to its interaction with polarization fluctuations in polar micro-regions, which are a consequence of the presence of oxygen vacancies caused by activation. The maximum value of dielectric permittivity was observed in the sample activated for 10 min. Also, the sample activated for 10 min exhibits relatively low values of loss tangent, compared to the other mechanically activated samples, providing the best overall dielectric performance compared to other samples.
Keywords:
XRD / SEM / Raman / Dielectric permittivity / SrTiO3 ceramicsSource:
Science of Sintering, 2022, 54, 4, 401-414Publisher:
- ETRAN
Funding / projects:
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200175 (Institute of Technical Sciences of SASA, Belgrade) (RS-MESTD-inst-2020-200175)
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200105 (University of Belgrade, Faculty of Mechanical Engineering) (RS-MESTD-inst-2020-200105)
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200116 (University of Belgrade, Faculty of Agriculture) (RS-MESTD-inst-2020-200116)
- National Science Foundation (NSF) grants [HRD-1345219, DMR-1523617]
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Mašinski fakultetTY - JOUR AU - Živojinović, Jelena AU - Kosanović, Darko AU - Blagojević, Vladimir A. AU - Pavlović, Vera P. AU - Tadić, Nenad AU - Vlahović, Branislav AU - Pavlović, Vladimir B. PY - 2022 UR - https://machinery.mas.bg.ac.rs/handle/123456789/4201 AB - In this study, microstructure evolution and dielectric properties of SrTiO3 ceramic have been investigated, whereby mechanical activation of SrTiO3 powders was used to modify the functional properties of ceramic materials. Microstructural SEM analysis of SrTiO3 ceramics showed that the increase in mechanical activation time results in less porous samples. Raman spectroscopy indicated changes in the broadening and asymmetry of the TO2 mode with a change in the time of mechanical activation. TO2 mode showed a Fano asymmetry due to its interaction with polarization fluctuations in polar micro-regions, which are a consequence of the presence of oxygen vacancies caused by activation. The maximum value of dielectric permittivity was observed in the sample activated for 10 min. Also, the sample activated for 10 min exhibits relatively low values of loss tangent, compared to the other mechanically activated samples, providing the best overall dielectric performance compared to other samples. PB - ETRAN T2 - Science of Sintering T1 - Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics EP - 414 IS - 4 SP - 401 VL - 54 DO - 10.2298/SOS2204401Z ER -
@article{ author = "Živojinović, Jelena and Kosanović, Darko and Blagojević, Vladimir A. and Pavlović, Vera P. and Tadić, Nenad and Vlahović, Branislav and Pavlović, Vladimir B.", year = "2022", abstract = "In this study, microstructure evolution and dielectric properties of SrTiO3 ceramic have been investigated, whereby mechanical activation of SrTiO3 powders was used to modify the functional properties of ceramic materials. Microstructural SEM analysis of SrTiO3 ceramics showed that the increase in mechanical activation time results in less porous samples. Raman spectroscopy indicated changes in the broadening and asymmetry of the TO2 mode with a change in the time of mechanical activation. TO2 mode showed a Fano asymmetry due to its interaction with polarization fluctuations in polar micro-regions, which are a consequence of the presence of oxygen vacancies caused by activation. The maximum value of dielectric permittivity was observed in the sample activated for 10 min. Also, the sample activated for 10 min exhibits relatively low values of loss tangent, compared to the other mechanically activated samples, providing the best overall dielectric performance compared to other samples.", publisher = "ETRAN", journal = "Science of Sintering", title = "Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics", pages = "414-401", number = "4", volume = "54", doi = "10.2298/SOS2204401Z" }
Živojinović, J., Kosanović, D., Blagojević, V. A., Pavlović, V. P., Tadić, N., Vlahović, B.,& Pavlović, V. B.. (2022). Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics. in Science of Sintering ETRAN., 54(4), 401-414. https://doi.org/10.2298/SOS2204401Z
Živojinović J, Kosanović D, Blagojević VA, Pavlović VP, Tadić N, Vlahović B, Pavlović VB. Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics. in Science of Sintering. 2022;54(4):401-414. doi:10.2298/SOS2204401Z .
Živojinović, Jelena, Kosanović, Darko, Blagojević, Vladimir A., Pavlović, Vera P., Tadić, Nenad, Vlahović, Branislav, Pavlović, Vladimir B., "Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics" in Science of Sintering, 54, no. 4 (2022):401-414, https://doi.org/10.2298/SOS2204401Z . .