Ce0.8Gd0.2O1.9 Powders Synthesized by Co-Precipitation and Amorphous Citrate Processes

Abstract:

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Powders of Ce0.8Gd0.2O1.9 were synthesized by co-precipitation and amorphous citrate routes and their compositions and structures were compared. Co-precipitation process was carried out at room temperature, while amorphous citrate synthesis was performed at 60-70 °C. The powders obtained were calcined at 700 °C for 1 h. X-ray diffraction analyses showed that a single fluorite structure was formed by both synthesis techniques. Pellets from these powders were prepared by compaction at 30 kN/cm2 and sintered at 1593 °C in air. WDS analysis confirmed the homogeneity of the pellets. The sintered pellets obtained by amorphous citrate and by coprecipitation routes showed relative densities over 97 % of the theoretical density. These results indicated that the citrate amorphous route is an interesting and simple technique to prepare gadolinium-doped ceria powders with high sinterability.

Info:

Periodical:

Materials Science Forum (Volumes 498-499)

Edited by:

Lucio Salgado and Francisco Ambrozio Filho

Pages:

624-629

DOI:

10.4028/www.scientific.net/MSF.498-499.624

Citation:

M. C. Brant et al., "Ce0.8Gd0.2O1.9 Powders Synthesized by Co-Precipitation and Amorphous Citrate Processes", Materials Science Forum, Vols. 498-499, pp. 624-629, 2005

Online since:

November 2005

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Price:

$35.00

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