| abstract |
The present invention provides a process for preparing an aluminum-titanate-based sintered body comprising the step of firing, at 1250 to 1700° C., a formed product prepared from a raw material mixture containing 100 parts by weight of a mixture of TiO<SUB>2 </SUB>and Al<SUB>2</SUB>O<SUB>3 </SUB>in a weight ratio of TiO<SUB>2</SUB>:Al<SUB>2</SUB>O<SUB>3</SUB>=40:60 to 60:40, and 1 to 15 parts by weight of an alkali feldspar represented by the formula:(Na<SUB>x</SUB>K<SUB>1-x</SUB>)AlSi<SUB>3</SUB>O<SUB>8 </SUB>wherein 0<=x<=1. According to the process of the present invention, it is possible to obtain an aluminum-titanate-based sintered body in which inherent properties of an aluminum titanate, i.e., a low coefficient of thermal expansion and high corrosion resistance are maintained, the mechanical strength thereof is improved, and which can be stably used even under high temperature conditions. |