Oxygen permeation properties of perovskite-related intergrowth oxides in the Sr-Fe-Co-O system

被引：0
作者：
Prado, F [1 ]
Armstrong, T [1 ]
Manthiram, A [1 ]
机构：
[1] Univ Texas, Mat Sci & Engn Program, Austin, TX 78712 USA
来源：
MATERIALS FOR ELECTROCHEMICAL ENERGY CONVERSION AND STORAGE | 2002年 / 127卷
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中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Sr-4(Fe,CO)(6)O13+delta and the n = 1, 2, 3 members of the Ruddlesden-Popper (R-P) series (La,Sr)(n+1)(Fe,CO)nO(3n+1) crystallizing in perovskite-related intergrowth structures have been investigated for use as oxygen separation membranes. The oxygen permeation flux jO(2) of Sr4Fe6-yCoyO13+delta for y > 1.5 is due to a Fe-rich perovskite phase present as a secondary phase. The three R-P compounds differ in the oxygen permeation properties. While the Sr3-xLaxFe2-yCoyO7-delta (n = 2) and LaSr3Fe3-yCoyO10-delta (n = 3) phases show oxygen permeation flux values one order of magnitude lower than the SrCo0.8Fe0.2O3-Sperovskite phase, the La1-xSr1+xFe1-yCoYO4 (n = 1) phases show negligible oxygen permeability. The Sr3-xLaxFe2-yCoyO7-delta phases show good structural stability at high temperatures.
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页码：59 / 68
页数：10
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