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Lattice Parameters of Gd-Doped Ceria Electrolytes

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Abstract:

This paper deals with Gd-doped ceria solid solutions: Ce1−XGdXO2−d with "x" ranging from 0 to 0.2. Four different powders were synthesized by modified glycine nitrate procedure with very precise stoichiometry according to tailored composition. The method was modified by decreasing glycine/nitrate ratio to 0.5. All obtained solid solutions exhibit a fluorite-type crystal structure with composition dependent lattice parameters. The variation of the lattice parameter was studied and correlated with the equation describing the ion-packing model. It has been found that the change of lattice parameter versus Gd concentration obeys Vegard's rule very well. Results also show that all powders are nanometric in size. The average size of Ce1−XGdXO2−d particles is about 20 nm.

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Periodical:

Materials Science Forum (Volume 494)

Pages:

175-180

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.494.175

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Online since:

September 2005

Authors:

B. Matović, Snezana Bošković, Ljiljana Živković, M.D. Vlajić, Vladimir D. Krstić

Keywords:

Ceria, Lattice Parameter, Nanomaterial, Solid Solution

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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