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.
Original language | English |
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Pages (from-to) | 167-171 |
Number of pages | 5 |
Journal | Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques |
Volume | 96 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2005 Feb |
Keywords
- Boundary potential
- Electric field
- Grain boundary
- La-doped BaTiO
- Microstructural evolution
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Metals and Alloys
- Materials Chemistry