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The influence of cation non-stoichiometry on the properties of undoped and gadolinia-doped barium cerate

✍ Scribed by D. Shima; S.M. Haile

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
998 KB
Volume
97
Category
Article
ISSN
0167-2738

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✦ Synopsis

The influence of A:B cation non-stoichiometry on the structural and electrical properties of BaCeO and of 15% Gd-doped 3 BaCeO has been investigated. X-ray powder diffraction and water uptake measurements suggest the occupation of Ba sites 3 by Gd in barium-deficient, doped materials. This phenomenon is exacerbated by high temperature processing, which causes additional loss of barium. The relationship between defect chemistry, stoichiometry and conductivity, as measured by a.c. impedance spectroscopy, is discussed.

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