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Processing and Electrochemical Properties of Mixed Conducting Lat-xAxCo1-yFeyO3-δ (A=Sr, Ca)

Published online by Cambridge University Press:  16 February 2011

W. J. Weber ,
J. W. Stevenson ,
T. R. Armstrong ,
L. R. Pederson  and
J. J. Kingsley
W. J. Weber
Affiliation:
Pacific Northwest Laboratory, P.O. Box 999, Richland, WA 99352, USA
J. W. Stevenson
Affiliation:
Pacific Northwest Laboratory, P.O. Box 999, Richland, WA 99352, USA
T. R. Armstrong
Affiliation:
Pacific Northwest Laboratory, P.O. Box 999, Richland, WA 99352, USA
L. R. Pederson
Affiliation:
Pacific Northwest Laboratory, P.O. Box 999, Richland, WA 99352, USA
J. J. Kingsley
Affiliation:
Pacific Northwest Laboratory, P.O. Box 999, Richland, WA 99352, USA
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Abstract

Powder compositions in the series Lat-xAxCo1-yFeyO3-δ (A=Sr, Ca) have been prepared by a combustion synthesis method. Sintering of pressed powders produced high-density test specimens with the perovskite structure. The specimens exhibited high electrical conductivities with appreciable oxygen-ion conductivity that increased with Co content for the compositions studied. Oxygen permeation studies showed a significant flux of oxygen that increased with temperature for specimens in a P(O2) gradient with no applied field. Thermogravimetric studies of the Lat-xCo0.2Fe0.8O3-δ system indicated a reversible mass loss with increasing temperature that increased with Sr content.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 369: Symposium U – Solid State Ionics IV , 1994 , 395
Copyright
Copyright © Materials Research Society 1995

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