Analysis of the sintering process in gadolinia-doped ceria by thermodilatometry and correlation with microstructure evolution

Autor(es)

Batista, Rafael M. ^[1] ; Muccillo, E. N. S. ^[1]

Afiliação do(s) autor(es)

^[1] Energy & Nucl Res Inst IPEN, Ctr Mat Sci & Technol, POB 11049, BR-05422970 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. 132, n. 2, p. 851-857, MAY 2018.
• Citações Web of Science: 3

Resumo

The non-isothermal sintering process of cerium dioxide containing gadolinium sesquioxide powders within a wide range of specific surface area was investigated by dilatometry. Linear shrinkage data of powder compacts were recorded under several constant rates of heating. Dilatometry data were analyzed by two methodologies enabling to preview the relative density for any temperature/time profile, and determination of the apparent activation energy for sintering. Correlation of dilatometry results with microstructure evolution was also carried out. Remarkable differences in sintering powders with different specific surface areas were found. The apparent activation energy for sintering increases with decreasing specific surface area and, in most cases, it does not change significantly in the approximately 70-85% range of relative density. (AU)

• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs