Reaction sintered Al2O3/Al2TiO5 microcrack-free composites obtained by colloidal filtration

被引：42

作者：

Bueno, S ^{[1
]}

Moreno, R ^{[1
]}

Baudín, C ^{[1
]}

机构：

[1] CSIC, Inst Ceram & Vidrio, E-28049 Madrid, Spain

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2004年 / 24卷 / 09期

关键词：

Al2O3; Al2TiO5; composites; slip casting; thermal conductivity;

D O I：

10.1016/j.jeurceramsoc.2003.08.015

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Dense and microcrack-free Al2O3/Al2TiO5 Composites (10, 30 and 40 vol.% of Al2TiO5) have been obtained by colloidal filtration and reaction sintering, using alumina and titania as starting powders. The processing of the composites has been studied focusing on the theological behaviour of aqueous suspensions of each powder and of mixtures. Colloidal filtration of optimised suspensions, with a solid loading as high as 50 vol.%, and a thermal treatment at 1450 degreesC, lead to completely reacted and uncracked sintered materials with homogeneously distributed aluminium titanate contents up to 40 vol.% and high density. Thermal diffusivity values from 25 to 800 degreesC are coincident on heating and cooling for the three studied composites, and decrease with temperature and with aluminium titanate content. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：2785 / 2791

页数：7

共 23 条

[1] Extrusion characteristics of alumina-aluminium titanate composite using boehmite as a reactive binder [J].