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

doi:10.2109/jcersj2.19001

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

Research output: Contribution to journal › Article

Abstract

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.

Original language	English
Pages (from-to)	383-387
Number of pages	5
Journal	Journal of the Ceramic Society of Japan
Volume	127
Issue number	6
DOIs	https://doi.org/10.2109/jcersj2.19001
Publication status	Published - 2019 Jun 1
Externally published	Yes

Keywords

Ferroelectric
Oxygen partial pressure
Perovskite
Piezoelectric

ASJC Scopus subject areas

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

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Aizawa, T., Fujii, I., Ueno, S., Suzuki, T. S., & Wada, S. (2019). Effect of oxygen partial pressure during sintering on electric properties of BiFeO₃-based piezoelectric ceramics. Journal of the Ceramic Society of Japan, 127(6), 383-387. https://doi.org/10.2109/jcersj2.19001

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title = "Effect of oxygen partial pressure during sintering on electric properties of BiFeO3-based piezoelectric ceramics",

abstract = "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.",

keywords = "Ferroelectric, Oxygen partial pressure, Perovskite, Piezoelectric",

author = "Tomoya Aizawa and Ichiro Fujii and Shintaro Ueno and Suzuki, {Tohru S.} and Satoshi Wada",

year = "2019",

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doi = "10.2109/jcersj2.19001",

language = "English",

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AU - Aizawa, Tomoya

AU - Fujii, Ichiro

AU - Ueno, Shintaro

AU - Suzuki, Tohru S.

AU - Wada, Satoshi

PY - 2019/6/1

Y1 - 2019/6/1

N2 - 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.

AB - 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.

KW - Ferroelectric

KW - Oxygen partial pressure

KW - Perovskite

KW - Piezoelectric

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