Journal of the Ceramic Society of Japan
Online ISSN : 1882-1022
Print ISSN : 0914-5400
ISSN-L : 0914-5400
Special Issue ''Innovative Ceramics (I)'': Papers
Synthesis and Characterization of Nanosize Ceria-Gadolinia Powders
Oleg VASYLKIVTaras KOLODIAZHNYIYoshio SAKKAValeriy V. SKOROKHOD
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2005 Volume 113 Issue 1313 Pages 101-106

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Abstract

Three different methods of synthesis of ceria-gadolinia (CGO) nanopowders are presented. We established a technique of the synthesis of uniformly aggregated, agglomerate-free CGO in which ceria-gadolinia composite nano-aggregates (15-40 nm) are prepared by nucleation and crystallization of ceria on the surface of preliminary synthesized, hydrolyzed and ultrasonically de-agglomerated gadolinia (3-17 nm). Nano-size aggregates (12-65 nm) of CGO were produced during subsequent non-isothermal calcination. The incorporation of the small concentrations of gadolinia in the ceria lattice was studied using the electron spin resonance technique. It was confirmed that Gd3+ occupies the sites of both cubic and axial symmetry. With increasing concentration, Gd3+ forms a defect complex with the oxygen vacancy.

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© 2005 The Ceramic Society of Japan
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