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

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

研究成果: Article

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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.

元の言語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
発行部数6
DOI
出版物ステータスPublished - 2019 6 1

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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