Oxygen transport in La sub(0.6)Sr sub(0.4)Co sub(0.2)Fe sub(0.8)O sub(3- delta )

Oxygen transport and oxygen surface reaction measurements have been obtained for La sub(0.6)Sr sub(0.4)Co sub(0.2)Fe sub(0.8)O sub(3- delta ) using the conductivity relaxation technique. These measurements are compared with tracer diffusion coefficients and surface exchange coefficients obtained for...

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Bibliographic Details
Published in:Solid state ionics 1999-01, Vol.121 (1), p.201-208
Main Authors: Lane, J A, Benson, S J, Waller, D, Kilner, J A
Format: Article
Language:English
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Summary:Oxygen transport and oxygen surface reaction measurements have been obtained for La sub(0.6)Sr sub(0.4)Co sub(0.2)Fe sub(0.8)O sub(3- delta ) using the conductivity relaxation technique. These measurements are compared with tracer diffusion coefficients and surface exchange coefficients obtained for the same material. The change in oxygen stoichiometry of this material with temperature and oxygen partial pressure has been demonstrated. The values derived from these experiments have been used to calculate the theoretical oxygen fluxes and close agreement has been found with actual oxygen fluxes obtained from permeation experiments through a dense La sub(0.6)Sr sub(0 4)Co sub(0.2)Fe sub(0.8)O sub(3- delta ) sample using a modified Wagner model.
ISSN:0167-2738