Visualization of grain boundary as blocking layer for oxygen tracer diffusion and a proposed defect model in non doped BaTiO3 ceramics

Ken Watanabe, Isao Sakaguchi, Shunichi Hishita, Naoki Ohashi, Hajime Haneda

研究成果: Contribution to journalArticle査読

13 被引用数 (Scopus)

抄録

We performed visualization of the oxygen diffusion path in oxidized and reduced BaTiO3 ceramics by utilizing an ion-imaging technique. The oxygen tracer diffused quickly from the surface up to the grain boundary, and then behaved as discontinuous steps at the grain boundary. The grain boundary acted as a blocking layer against oxygen diffusion. The reduction process enhanced the blocking effect. The blocking of oxygen diffusion at the grain boundary originated in the formation and distribution of complex defects between the charged oxygen vacancy and the reduced Ti near the grain boundary.

本文言語英語
ジャーナルApplied Physics Express
4
5
DOI
出版ステータス出版済み - 5 1 2011
外部発表はい

All Science Journal Classification (ASJC) codes

  • 工学(全般)
  • 物理学および天文学(全般)

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