Effect of ceria content on the sintering of ZrO2 based ceramics synthesized from a polymeric precursor
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Data
2000-07-01
Autores
Quinelato, A. L.
Longo, Elson [UNESP]
Perazolli, Leining Antonio [UNESP]
Varela, José Arana [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
Zirconia-ceria powders with ceria concentration varying from 0 to 12 mol% were synthesized using a polymeric precursor route based on the Pechini process. Powder characteristics were evaluated with regard to the crystallite size, BET surface area, phase distribution, nitrogen adsorption/desorption behavior, and agglomeration state. Sintering was studied considering the shrinkage rate, densification, grain size, and phase evolution. It was demonstrated that the synthesis method is effective to prepare nanosized powders of tetragonal zirconia single-phase. Sinterability mainly depended on the agglomeration state of powders and the monoclinic phase content, fully tetragonal zirconia ceramic, with grain size of 2.4 mu m, was obtained after addition of at least 9 mol% ceria and sintering at 1500 degrees C for 4 h. (C) 2000 Elsevier B.V. Ltd. All rights reserved.
Descrição
Palavras-chave
CeO2, microstructure-final, powders-chemical preparation, precursors-organic, sintering, ZrO2
Como citar
Journal of the European Ceramic Society. Oxford: Elsevier B.V., v. 20, n. 8, p. 1077-1084, 2000.