Journal
SOLID STATE IONICS
Volume 179, Issue 21-26, Pages 1090-1093Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2008.01.025
Keywords
cation disorder; perovskite; electrical conductivity; crystal structure
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Funding
- Natural Environment Research Council [NE/C513169/1] Funding Source: researchfish
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The Rare-Earth ferrates REFeO3 (RE= La, Pr, Sm, Gd, Ho) were prepared by the citric acid route. The distortion in the FeO6 octahedron decreased with the decrease in the ionic radii (except for Ho) and the angle between adjacent FeO6 octahedra decreased with the ionic radius of the rare earth. Electrical conductivity showed semiconducting behaviour with a complex dependence of the activation energy on the ionic radii of RE ion. Fast oxygen desorption was observed above 300 degrees C. No effect of A-site cation on the coefficients of thermal expansion was observed. (c) 2008 Elsevier B.V. All rights reserved.
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