The crystal structure of ionic conductor LaxCe1-xO2-x/2

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The crystal structure of La3+ substituted CeO2 solid solution (LaxCe1-xO2-x/2) has been investigated by X-ray and neutron powder diffractions. The fluorite structure of CeO2 is still maintained up to x=0.4 composition although La3+ is the largest trivalent rare earth ion. For xgreater than or equal to0.5 the crystal structure changes to the pyrochloric cation ordering and the remnant La2O3 is unreacted. This structure can, however, be stabilized by Ti4+ addition or thermal treatment. (C) 2003 Elsevier Ltd. All rights reserved.
Publisher
Elsevier Sci Ltd
Issue Date
2004
Language
English
Article Type
Article; Proceedings Paper
Keywords

NONSTOICHIOMETRIC CERIUM DIOXIDE; ELECTRICAL-CONDUCTIVITY; OXIDE SYSTEM; EARTH-OXIDE; DOPED CERIA; ELECTROLYTES; MICROSTRUCTURE

Citation

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, v.24, no.6, pp.1291 - 1294

ISSN
0955-2219
URI
http://hdl.handle.net/10203/82160
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