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A Study of the Oxygen Transport Kinetics in SrFeO3-x

Published online by Cambridge University Press:  11 February 2011

Jiho Yoo  and
Allan J. Jacobson
Jiho Yoo
Affiliation:
Center for Materials Chemistry, University of Houston, 4800 Calhoun Rd., Houston, TX, USA, 77204–5002
Allan J. Jacobson
Affiliation:
Center for Materials Chemistry, University of Houston, 4800 Calhoun Rd., Houston, TX, USA, 77204–5002
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Abstract

Experimental results from electrical conductivity relaxation (ECR) measurements on SrFeO3-x are described. Values of Dchem and kchem were obtained by monitoring the variation of the time dependence of the electrical conductivity after an abrupt change in the oxygen partial pressure. Values for the oxygen ion and vacancy diffusion coefficients were calculated from the measured thermodynamic factors and compared with those of other compositions in the series La1-xSrxFeO3-x. The surface exchange coefficients, kchem and kex were also determined.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 756: Symposia EE/FF – Solid-State Ionics – Materials for Fuel Cells and Fuel Processors , 2002 , EE3.10
Copyright
Copyright © Materials Research Society 2003

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References

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