Effect of external electric field on the microstructural evolution of La2O3-doped BaTiO3 ceramics

Hong Ri Jin, Seok Hyun Yoon, Jong Heun Lee, Nong M. Hwang, Doh Yeon Kim, Joo Hwan Han

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)167-171
Number of pages5
JournalZeitschrift fuer Metallkunde/Materials Research and Advanced Techniques
Volume96
Issue number2
DOIs
Publication statusPublished - 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

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