Low-temperature Sinterable Ce0.9Gd0.lO1.95 Powder Synthesized through Newly-devised Heat-treatment in the Coprecipitation Process

The low-temperature sinterable Ce0.9Gd0.1O1.95 (CGO) powder has been synthesized through a newly-devised heat-treatment process in the coprecipitation method. The precipitate obtained by the coprecipitation method, namely cerium-gadolinium carbonate slurry, was stirred at 80℃ for 3 h. After filtrati...

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Bibliographic Details
Published in:Denki kagaku oyobi kōgyō butsuri kagaku 2003/10/05, Vol.71(10), pp.866-872
Main Authors: SUDA, Eisaku, PACAUD, Bernard, MONTARDI, Yvan, MORI, Masashi, OZAWA, Masakuni, TAKEDA, Yasuo
Format: Article
Language:English
Subjects:
Cerium Oxide
Coprecipitation
Electrolyte
Sintering Characteristics
SOFC
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Summary:The low-temperature sinterable Ce0.9Gd0.1O1.95 (CGO) powder has been synthesized through a newly-devised heat-treatment process in the coprecipitation method. The precipitate obtained by the coprecipitation method, namely cerium-gadolinium carbonate slurry, was stirred at 80℃ for 3 h. After filtrating this slurry, the precipitate was washed using pure water and was calcined at 700℃ for 5 h in air. From the results of transmission electron microscopy and X-ray diffraction analysis, the CGO powder showed uniform particle size of approximately 100 nm and its crystallite size was calculated to be approximately 20 nm. For the tablet of the powder, the relative densities reached ≥ 94% at temperatures ≥ 1000℃ for holding time ≥ 5 h.
ISSN:1344-3542
2186-2451
DOI:10.5796/electrochemistry.71.866