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Oxide ion diffusion in optimised LAMOX materials

被引：29
作者：
Georges, S
Skinner, SJ
Lacorre, P
Steil, MC
机构：
[1] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England
[2] Univ Maine, Lab Oxydes & Fluorures, UMR 6010, CNRS, F-72085 Le Mans 9, France
[3] Ecole Natl Super Chim Lille, Lab Cristallochim & Physicochim Solides, F-59652 Villeneuve Dascq, France
来源：
DALTON TRANSACTIONS | 2004年 / 19期
关键词：
D O I：
10.1039/b401253d
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
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 x 10(-6) cm(2) s(-1) at 800 degreesC. Further, it was found that the substitution of isotopic oxygen into the ceramic was limited in dry atmospheres but significantly enhanced in a (H2OO)-O-18-O-16 atmosphere, in common with recent reports on the diffusion/ exchange behaviour of the BIMEVOX class of oxide ion conductors.
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页码：3101 / 3105
页数：5
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