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Effect of external electric field on the microstructural evolution of La2O3-doped BaTiO3ceramics
- Source :
- International Journal of Materials Research: Zeitschrift fuer Metallkunde; January 2022, Vol. 96 Issue: 2 p167-171, 5p
- Publication Year :
- 2022
-
Abstract
- The grain growth behavior of La-doped BaTiO3specimens was investigated at 1350 °C under DC external electric field. In air atmosphere, grain growth was enhanced at the positive-biased region for the 0.15 mol% La-doped and 0.3 mol% La-doped specimens, while it was enhanced at the negative-biased region for the 1.0 mol% La-doped specimen. For the 0.6 mol% La-doped specimen, on the other hand, both positive- and negative-biased regions showed the same grain size. The demarcation donor composition (0.6 mol% La) shifted to a higher donor concentration when the specimen was heat-treated in nitrogen. The results were explained in terms of the grain boundary potential and its variation with donor concentration, oxygen partial pressure, and defect polarization.
Details
- Language :
- English
- ISSN :
- 18625282
- Volume :
- 96
- Issue :
- 2
- Database :
- Supplemental Index
- Journal :
- International Journal of Materials Research: Zeitschrift fuer Metallkunde
- Publication Type :
- Periodical
- Accession number :
- ejs58747597
- Full Text :
- https://doi.org/10.3139/ijmr-2005-0029