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Issue 19, 2004
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Oxide ion diffusion in optimised LAMOX materials

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Abstract

A series of optimised materials in the family with parent compound La2Mo2O9 have been studied using the isotope exchange depth profile technique and SIMS analysis. The data collected indicate that the oxide ion diffusion coefficients in both the parent compound and optimised materials are significantly higher than those reported for any of the fluorite structured electrolyte materials, with a peak value for the La1.7Gd0.3Mo2O9 composition of 1.41 × 10−6 cm2 s−1 at 800 °C. Further, it was found that the substitution of isotopic oxygen into the ceramic was limited in dry atmospheres but significantly enhanced in a H218O/16O atmosphere, in common with recent reports on the diffusion/exchange behaviour of the BIMEVOX class of oxide ion conductors.

Graphical abstract: Oxide ion diffusion in optimised LAMOX materials

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Article information


Submitted
26 Jan 2004
Accepted
04 Mar 2004
First published
23 Jul 2004

Dalton Trans., 2004, 3101-3105
Article type
Paper

Oxide ion diffusion in optimised LAMOX materials

S. Georges, S. J. Skinner, P. Lacorre and M. C. Steil, Dalton Trans., 2004, 3101
DOI: 10.1039/B401253D

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