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

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Abstract:

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.

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Periodical:

Materials Science Forum (Volumes 498-499)

Pages:

624-629

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.498-499.624

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Online since:

November 2005

Authors:

Márcia Caldeira Brant, Felipe da Silva Possa, Fernando Soares Lameiras

Keywords:

Amorphous Citrate, Ceria, Co-Precipitation, Synthesis

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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