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Determination of Oxygen Permeation Kinetics in A Ceramic Membrane with The Composition SrFeCo0.5O3.25-δ

Published online by Cambridge University Press:  10 February 2011

S. Kim ,
Y. L. Yang ,
R. Christoffersen  and
A. J. Jacobson
S. Kim
Affiliation:
University of Houston, Department of Chemistry, Houston, TX 77204–5641.
Y. L. Yang
Affiliation:
University of Houston, Department of Chemistry, Houston, TX 77204–5641.
R. Christoffersen
Affiliation:
University of Houston, Department of Chemistry, Houston, TX 77204–5641.
A. J. Jacobson
Affiliation:
University of Houston, Department of Chemistry, Houston, TX 77204–5641.
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Abstract

The oxygen permeation through an oxide membrane with bulk composition SrFeCo0.5O3.25-δ has been measured as a function of both oxygen partial pressure and temperature. The results of the pressure dependence of the permeation indicate that the oxygen transport in this membrane is dependent primarily on the bulk diffusion rate. Although the permeation experiments were carried out at temperatures within, or very close to, the range where SrFeCo0.5O3.25-δ is stable as a pure single phase, the membrane was found to consist of SrFe1.5-xO3.25-δ(x = ∼0.42) together with fractions of Sr(Co,Fe)O3-δ perovskite and Co-Fe oxide that formed as stable phases during densification of the membrane at high temperature (1090°C). These additional phases persisted in the membrane during the permeation measurements.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 496: Symposium Y – Materials For Electrochemical Energy Storage & Conversion II… , 1997 , 249
Copyright
Copyright © Materials Research Society 1998

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References

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