Artigo
Alumina developed by pre-gelling starch consolidation (PSC)
Fecha
2009-03-01Registro en:
Journal of The European Ceramic Society. Oxford: Elsevier B.V., v. 29, n. 4, p. 661-668, 2009.
0955-2219
10.1016/j.jeurceramsoc.2008.07.046
WOS:000262573100016
Autor
Universidade Estadual Paulista (Unesp)
Resumen
In this paper, pre-gelling starch was used to consolidate alumina-dense ceramic suspensions. The colloidal processing of the ceramic was prepared with alumina and commercial potato starch, and slips were prepared with 55 vol% of solids and 0.5 wt.% of starch. This small amount of starch was possible because of a previous pre-gelling starch treatment, resulting in more homogeneous suspensions and particles smaller than starch granules. Additionally, Sucrose was also used as a dispersion aid. After sintering, the samples were analysed according to their mechanical properties. These processes produced ceramics with a 93% relative density, 325 MPa flexural strength, and a Weibull module whose value wits m = 10, maintaining the capacity of this process to produce complex geometric shaped ceramics. (C) 2008 Elsevier Ltd. All rights reserved.