An oxygen permeable membrane La0.8Sr0.2(Ga0.8Mg0.2)1-xCrxO3-δ for a reduced atmosphere

被引：10
|
作者：
Ishida, J. [1 ]
Murata, K. [1 ]
Ichikawa, T. [1 ]
Hirano, A. [1 ]
Imanishi, N. [1 ]
Takeda, Y. [1 ]
Yamamoto, O. [1 ]
机构：
[1] Mie Univ, Fac Engn, Dept Chem, Tsu, Mie 5148507, Japan
来源：
SOLID STATE IONICS | 2009年 / 180卷 / 17-19期
关键词：
Oxygen permeable membrane; Mixed conductor; Perovskite oxide; Oxide ion conductor; OXIDE IONIC-CONDUCTIVITY; DENSE CERAMIC MEMBRANES; PEROVSKITE-TYPE OXIDE; PARTIAL OXIDATION; METHANE; PERMEATION; FE; NI; CO; STABILITY;
D O I：
10.1016/j.ssi.2009.05.016
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：
Mixed electron hole and oxide ion conducting perovskite-type oxides. La0.8Sr0.2(Ga0.8Mg0.2)(1-x)CrxO3-delta (0 <= x <= 1.0). were prepared by solid state reaction. The phase stability and the oxygen permeation properties of the oxides were examined as a function of the content of Cr. La0.8Sr0.2(Ga0.8Mg0.2)(1-x)CrxO3-delta has a perovskite related tetragonal phase with x=0.1 to 0.8. The total electrical conductivity of La0.8Sr0.2 (Ga0.8Mg0.2)(1-x)CrxO3-delta increases with increasing x. The oxygen permeation flux across the La0.8Sr0.2 (Ga0.8Mg0.2)(1-x)CrxO3-delta membranes at higher temperatures increases with x up to x = 04. The maximum oxygen permeation flux of 1.6 x 10(-7) mol(-1) cm(-2) at 1100 degrees C in a oxygen activity gradient of air/10(-2) Pa is observed in La0.8Sr0.2(Ga0.8Mg0.2)(0.6)Cr0.4O3-delta. This perovskite-type oxide is stable under an oxygen partial pressure of 7 x 10(-10) Pa at 1000 degrees C. (c) 2009 Elsevier B.V. All rights reserved.
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收藏
页码：1045 / 1049
页数：5
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