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Título

Mullite compacts obtained by colloidal filtration of aluminapowders dispersed in colloidal silica suspensions

Autor Burgos-Montes, Olga; Nieto, María Isabel; Moreno Botella, Rodrigo María
Palabras clave Suspensions
Shaping
Fecha de publicación 2007
EditorElsevier
Citación Ceramics International 33 (2007) 327–332
ResumenThis work deals with the manufacture of mullite-matrix composites by a colloidal filtration route. Avariation of the transient viscous sintering process is studied in which submicrometer sized alumina particles are dispersed in a nanosize colloidal silica suspension. High solids loading suspensions (45 and 50 vol.%) are prepared by ultrasonic mixing and dispersed with citric acid. Rheological optimisation allows to obtain low viscosities and to reduce thixotropy and ageing effects. Specimens are obtained by slip casting and sintered to 1550 8C/2 h by using different heating cycles, the best results being obtained with a plateau after the maximum rate of sintering where reaction occurs. # 2005 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Versión del editorhttp://dx.doi.org/doi:10.1016/j.ceramint.2005.09.018
URI http://hdl.handle.net/10261/18428
DOI10.1016/j.ceramint.2005.09.018
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