| Aluminium titanate is a material which has low-thermal expansion and can be used at high temperature. But it can not be used at some condition because it will be decomposed and becomes Al2O3 and TiO2 , and it has low strength. At first the good-structure ceramics prepared by gel-casting ,using agarose and aluminium titanate powders were prepared by inorganic salt . The effects of content of agarose and aluminium titanate powders on viscosity of AT ceramics suspension and strusture of ceramics were investigated . Some factors that may affect preparation, and performance of materials including density, thermal decomposition, thermal expansion, thermal shock resistance etc were discussed systematically. Two kinds of AT material have both high-strength and low-thermal expansion coefficient. The bending strength of MgO-CeO2-Si3N4w-AT series reached 70.6MPa, its temperature difference by thermal shock is 1200℃ and the sample was not fractured after thermally treated at 900 ℃ for 20 times. The bending strength of spoundume-MgO-AT reached 24.6MPa, its thermal expansion coefficient is 1.04*10-6/℃and becomes smaller when it is used at high temperature .The relationship between performance and sintering conditions was also studied. Proper sintering temperature and time were determined essentially. By measuring the relevant properties of material such as water absorption, density, SEM, thermal expansion coefficient, thermal shock temperature, and so on, the relationship of composing-structure-performance of AT ceramics was studied comprehensively. Good qualities of AT ceramics were prepared. Thermal shock resist mechanism of AT ceramics was also discussed in the paper .
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