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

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

研究成果: ジャーナルへの寄稿学術誌査読

92 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)2245-2248
ページ数4
ジャーナルSolid State Ionics
177
26-32 SPEC. ISS.
DOI
出版ステータス出版済み - 10月 31 2006

!!!All Science Journal Classification (ASJC) codes

  • 化学一般
  • 材料科学一般
  • 凝縮系物理学

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