Dielectric properties of mechanically activated strontium titanate ceramics
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 incr...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
International Institute for the Science of Sintering, Beograd
2022-01-01
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| Series: | Science of Sintering |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0350-820X/2022/0350-820X2204401Z.pdf |
| Summary: | 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. |
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| ISSN: | 0350-820X 1820-7413 |