Modeling of dense ceramic bilayer membranes

被引：13

作者：

Schroeder, M ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Phys Chem, D-52056 Aachen, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2005年 / 7卷 / 01期

关键词：

D O I：

10.1039/b405436a

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：

A numerical analysis of the transport properties and the chemical stability of bilayer membranes with the compositions La0.9Sr0.1FeO3/Ce0.8Gd0.2O2 and La1-xSrxCoO3/Ce0.8Gd0.2O2 was carried out. For each membrane layer, the oxygen permeation flux was derived as a function of the defect concentrations and defect mobilities. The defect concentrations were calculated from point defect models. Coupling of the flux equations via the continuity condition yields the overall permeation flux of the bilayer membrane and the oxygen chemical activity at the layer interface, which serves as a criterion for the stability of the membrane under reducing conditions.

引用

页码：166 / 172

页数：7

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