Effect of Y2O3 additive on conventional and microwave sintering of mullite

Autor(es)

Souto, P. M. ^[1] ; Menezes, R. R. ^[2] ; Kiminami, R. H. G. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Paraiba, Dept Mat Engn, BR-58059900 Joao Pessoa, Paraiba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS INTERNATIONAL; v. 37, n. 1, p. 241-248, JAN 2011.
• Citações Web of Science: 37

Resumo

Mullite has become a strong candidate material for advanced structural and functional ceramics. Much interest has recently focused on sintering aids for mullite. The aim of this study was to evaluate the effect of Y(2)O(3) as a sintering aid in the conventional and microwave sintering of mullite. To accomplish this study, a highly pure industrial mullite was used. Mullite with and without Y(2)O(3) was pressed under a cold isostatic pressure of 200 MPa. Samples were sintered conventionally at 1400, 1450, 1500, 1550 and 1600 degrees C for 2 h and microwave-sintered for up to 40 min using a large range of power. The microstructure and physical properties of the microwave-sintered samples were compared to those of the conventionally sintered samples. The results showed that Y(2)O(3) improved the densification of mullite bodies in the conventional and microwave sintering processes, but high densifications were achieved in just a few minutes when Y(2)O(3) was used with microwave processing. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved. (AU)

• Processo FAPESP: 07/59564-0 - Desenvolvimento de nanoestruturas cerâmicas em forno de microondas
• Beneficiário: Ruth Herta Goldschmidt Aliaga Kiminami
• Modalidade de apoio: Auxílio à Pesquisa - Regular