Effect of oxygen partial pressure during sintering on electric properties of BiFeO3-based piezoelectric ceramics

Tomoya Aizawa, Ichiro Fujii, Shintaro Ueno, Tohru S. Suzuki, Satoshi Wada

研究成果: Article査読

抄録

The effects of oxygen partial pressure (pO2) during sintering and post-annealing treatment on the microstructure and electrical properties of Mn-added 0.3BaTiO30.1Bi(Mg1/2Ti1/2)O30.6BiFeO3 ceramics were investigated. The ceramics sintered at pO2 of 0.11 atm showed pinched polarizationelectric field (PE) loops, while the ceramics sintered in nitrogen gas could not be measured due to dielectric breakdown. By annealed at 800°C for 5 h and cooled slowly, the ceramics showed increased remanent polarizations although their PE loops were still pinched. When the as-sintered ceramics were annealed at 800°C for 5 h and then quenched into water, well-developed ferroelectric hysteresis loops were observed. These results were discussed with grain size and defect dipoles consisted of oxygen vacancies and bismuth vacancies or iron ions with a different valence.

本文言語English
ページ(範囲)383-387
ページ数5
ジャーナルJournal of the Ceramic Society of Japan
127
6
DOI
出版ステータスPublished - 2019 6
外部発表はい

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学

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