Title

Defect Chemistry of Mixed Ionic/electronic P-type Oxides

Editor(s)

Orlovskaya, Nina and Browning, Nigel

Abstract

The p-type perovskite structure oxides are finding use in a number of energy related applications. In particular they are being used as cathodes in fuel cells as well as dense oxygen separation membranes. The defect concentration and defect mobility determine the electrical properties. Since both of these are dependent upon the operating temperature and oxygen activity, it is important to understand how an oxide equilibrates with its environment. In this paper, a defect chemistry model for the oxidation-reduction behavior of p-type perovskites is reviewed with formulations in the (La,Sr)(Cr,Mn,Co,Fe)03 system being used as examples.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Oxidation-Reduction; Electrical Conductivity; Oxygen Vacancies

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2004 Springer Verlag, All rights reserved.


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