Acceptor doped BiFeO3 ceramics: A new material for oxygen permeation membranes

Kyle Brinkman; Takashi Iijima; Hitoshi Takamura

doi:10.1143/JJAP.46.L93

Acceptor doped BiFeO₃ ceramics: A new material for oxygen permeation membranes

Kyle Brinkman, Takashi Iijima, Hitoshi Takamura

ENG - Materials Science

National Institute of Advanced Industrial Science and Technology

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

A new intermediate temperature mixed conducting material has been fabricated based on acceptor doping of bismuth ferrite (BiFeO₃). Acceptor doping at levels of 5 mol% with either Ca or Sr was found to increase the maximum operating temperature of ceramics by more than 10O°C as well as eliminate secondary phase formation often reported in the pure BiFeO₃ system. Mixed ionic and electronic conductivity was confirmed by measuring the oxygen permeation properties of doped ceramics which exhibited flux's on the order of 0.018 μmol/(cm² s) at 800°C over the oxygen partial pressure range 0.21 atm (air) to 10^-6 atm (He). Ceramic membranes showed an increase in oxygen flux with decreasing sample thickness ndicating good surface catalysis properties of the system.

Original language	English
Pages (from-to)	L93-L96
Journal	Japanese Journal of Applied Physics
Volume	46
Issue number	4-7
DOIs	https://doi.org/10.1143/JJAP.46.L93
Publication status	Published - 2007 Feb 9

Keywords

Ceramics
Ionic conduction
Oxygen separation membrane
Point defects

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10.1143/JJAP.46.L93

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abstract = "A new intermediate temperature mixed conducting material has been fabricated based on acceptor doping of bismuth ferrite (BiFeO3). Acceptor doping at levels of 5 mol% with either Ca or Sr was found to increase the maximum operating temperature of ceramics by more than 10O°C as well as eliminate secondary phase formation often reported in the pure BiFeO3 system. Mixed ionic and electronic conductivity was confirmed by measuring the oxygen permeation properties of doped ceramics which exhibited flux's on the order of 0.018 μmol/(cm2 s) at 800°C over the oxygen partial pressure range 0.21 atm (air) to 10-6 atm (He). Ceramic membranes showed an increase in oxygen flux with decreasing sample thickness ndicating good surface catalysis properties of the system.",

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TY - JOUR

T1 - Acceptor doped BiFeO3 ceramics

T2 - A new material for oxygen permeation membranes

AU - Brinkman, Kyle

AU - Iijima, Takashi

AU - Takamura, Hitoshi

PY - 2007/2/9

Y1 - 2007/2/9

N2 - A new intermediate temperature mixed conducting material has been fabricated based on acceptor doping of bismuth ferrite (BiFeO3). Acceptor doping at levels of 5 mol% with either Ca or Sr was found to increase the maximum operating temperature of ceramics by more than 10O°C as well as eliminate secondary phase formation often reported in the pure BiFeO3 system. Mixed ionic and electronic conductivity was confirmed by measuring the oxygen permeation properties of doped ceramics which exhibited flux's on the order of 0.018 μmol/(cm2 s) at 800°C over the oxygen partial pressure range 0.21 atm (air) to 10-6 atm (He). Ceramic membranes showed an increase in oxygen flux with decreasing sample thickness ndicating good surface catalysis properties of the system.

AB - A new intermediate temperature mixed conducting material has been fabricated based on acceptor doping of bismuth ferrite (BiFeO3). Acceptor doping at levels of 5 mol% with either Ca or Sr was found to increase the maximum operating temperature of ceramics by more than 10O°C as well as eliminate secondary phase formation often reported in the pure BiFeO3 system. Mixed ionic and electronic conductivity was confirmed by measuring the oxygen permeation properties of doped ceramics which exhibited flux's on the order of 0.018 μmol/(cm2 s) at 800°C over the oxygen partial pressure range 0.21 atm (air) to 10-6 atm (He). Ceramic membranes showed an increase in oxygen flux with decreasing sample thickness ndicating good surface catalysis properties of the system.

KW - Ceramics

KW - Ionic conduction

KW - Oxygen separation membrane

KW - Point defects

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JO - Japanese Journal of Applied Physics

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Acceptor doped BiFeO₃ ceramics: A new material for oxygen permeation membranes

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