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

被引：89

作者：

Teraoka, Y. ^{[1
]}

Shimokawa, H. ^{[1
]}

Kang, Ch. Y. ^{[1
]}

Kusaba, H. ^{[1
]}

Sasaki, K. ^{[1
]}

机构：

[1] Kyushu Univ, Fac Engn Sci, Dept Mol & Mat Sci, Kasuga, Fukuoka 8168580, Japan

来源：

SOLID STATE IONICS | 2006年 / 177卷 / 26-32期

基金：

日本科学技术振兴机构;

关键词：

mixed ionic-electronic conductor; perovskite; oxygen permeation; reduction tolerance;

D O I：

10.1016/j.ssi.2006.05.037

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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-delta 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-delta showed highest oxygen permeability (3.0 cm(3) (STP)cm(-2) min(-1) at 900 degrees 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% H-2/N-2 at 1000 degrees C, showing their exceeding reduction tolerance. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：2245 / 2248

页数：4

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