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Point Defects and Cation Diffusion in Cobaltous Oxide

Published online by Cambridge University Press:  16 February 2011

Sanjeev Aggarwal  and
RÜdiger Dieckmann
Sanjeev Aggarwal
Affiliation:
Cornell University, Department of Materials Science and Engineering, Ithaca NY 14853
RÜdiger Dieckmann
Affiliation:
Cornell University, Department of Materials Science and Engineering, Ithaca NY 14853
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Abstract

The deviation from stoichiometry, δ, in Co1-δ O was measured in-situ as a function of oxygen activity at temperatures between 1000 and 1400 ºC, using ahigh resolution microbalance. The experiments were conducted over the entire Co1-δO phase stability region at atmospheric pressure. The experimental results were analyzed with regard to the point defect structure and also in comparison with mass and charge transport data. Contrary to prior belief, it was found that the average mobility of the cationic defects and holes varied with their respective concentration.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 369: Symposium U – Solid State Ionics IV , 1994 , 301
Copyright
Copyright © Materials Research Society 1995

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