Fe-based perovskite-type oxides as excellent oxygen-permeable and reduction-tolerant materials

Y. Teraoka; H. Shimokawa; Ch Y. Kang; H. Kusaba; K. Sasaki

doi:10.1016/j.ssi.2006.05.037

Fe-based perovskite-type oxides as excellent oxygen-permeable and reduction-tolerant materials

Y. Teraoka, H. Shimokawa, Ch Y. Kang, H. Kusaba, K. Sasaki

Hydrogen Utilization Engineering

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

80 Citations (Scopus)

Abstract

Development of new mixed conductors with both high oxygen permeability and phase stability under reducing atmosphere is indispensable for realizing practical MIEC systems of oxygen separation and membrane reactor. In this study, a family of Co-free Fe-based perovskite-type oxides, (Ba,Sr)(Fe,Mn)O_3-δ was prepared and their oxygen permeability and phase stability against reduction were examined. Optimum Ba doping concentration at A site was found around 30%, and Ba_0.3Sr_0.7FeO_3-δ showed highest oxygen permeability (3.0 cm³(STP)cm^{- 2} min^{- 1} at 900 °C) in this study. Perovskite-type oxides of the Ba-Mn-Fe-O and Ba-Sr-Mn-Fe-O systems with appropriate compositions preserved the structure even after annealing in the reducing atmosphere of 5% H₂/N₂ at 1000 °C, showing their exceeding reduction tolerance.

Original language	English
Pages (from-to)	2245-2248
Number of pages	4
Journal	Solid State Ionics
Volume	177
Issue number	26-32 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.ssi.2006.05.037
Publication status	Published - Oct 31 2006

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "Fe-based perovskite-type oxides as excellent oxygen-permeable and reduction-tolerant materials",

abstract = "Development of new mixed conductors with both high oxygen permeability and phase stability under reducing atmosphere is indispensable for realizing practical MIEC systems of oxygen separation and membrane reactor. In this study, a family of Co-free Fe-based perovskite-type oxides, (Ba,Sr)(Fe,Mn)O3-δ was prepared and their oxygen permeability and phase stability against reduction were examined. Optimum Ba doping concentration at A site was found around 30%, and Ba0.3Sr0.7FeO3-δ showed highest oxygen permeability (3.0 cm3(STP)cm- 2 min- 1 at 900 °C) in this study. Perovskite-type oxides of the Ba-Mn-Fe-O and Ba-Sr-Mn-Fe-O systems with appropriate compositions preserved the structure even after annealing in the reducing atmosphere of 5% H2/N2 at 1000 °C, showing their exceeding reduction tolerance.",

author = "Y. Teraoka and H. Shimokawa and Kang, {Ch Y.} and H. Kusaba and K. Sasaki",

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T1 - Fe-based perovskite-type oxides as excellent oxygen-permeable and reduction-tolerant materials

AU - Teraoka, Y.

AU - Shimokawa, H.

AU - Kang, Ch Y.

AU - Kusaba, H.

AU - Sasaki, K.

PY - 2006/10/31

Y1 - 2006/10/31

N2 - Development of new mixed conductors with both high oxygen permeability and phase stability under reducing atmosphere is indispensable for realizing practical MIEC systems of oxygen separation and membrane reactor. In this study, a family of Co-free Fe-based perovskite-type oxides, (Ba,Sr)(Fe,Mn)O3-δ was prepared and their oxygen permeability and phase stability against reduction were examined. Optimum Ba doping concentration at A site was found around 30%, and Ba0.3Sr0.7FeO3-δ showed highest oxygen permeability (3.0 cm3(STP)cm- 2 min- 1 at 900 °C) in this study. Perovskite-type oxides of the Ba-Mn-Fe-O and Ba-Sr-Mn-Fe-O systems with appropriate compositions preserved the structure even after annealing in the reducing atmosphere of 5% H2/N2 at 1000 °C, showing their exceeding reduction tolerance.

AB - Development of new mixed conductors with both high oxygen permeability and phase stability under reducing atmosphere is indispensable for realizing practical MIEC systems of oxygen separation and membrane reactor. In this study, a family of Co-free Fe-based perovskite-type oxides, (Ba,Sr)(Fe,Mn)O3-δ was prepared and their oxygen permeability and phase stability against reduction were examined. Optimum Ba doping concentration at A site was found around 30%, and Ba0.3Sr0.7FeO3-δ showed highest oxygen permeability (3.0 cm3(STP)cm- 2 min- 1 at 900 °C) in this study. Perovskite-type oxides of the Ba-Mn-Fe-O and Ba-Sr-Mn-Fe-O systems with appropriate compositions preserved the structure even after annealing in the reducing atmosphere of 5% H2/N2 at 1000 °C, showing their exceeding reduction tolerance.

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