| 摘要 |
Disclosed is a magnesium aluminum titanate crystal structure which has excellent heat resistance, excellent thermal shock resistance, high thermal decomposition resistance and high mechanical strength and thus can be stably used at varying high temperatures. Also disclosed is a method for producing such a magnesium aluminum titanate crystal structure. Specifically, such a magnesium aluminum titanate crystal structure is characterized by being composed of a solid solution wherein Al atoms are partially substituted with Si atoms in at least the surface layer of the magnesium aluminum titanate crystal structure having a chemical composition: MgxAl2(1-x)Ti(1+x)O5 (wherein 0.1 <= x < 1), by having a thermal expansion coefficient between -6x10-6 (1/K) and 6x10-6 (1/K) when heated to 50-800‹C at a heating rate of 20‹C/minute, and by having a residual ratio of magnesium aluminum titanate of not less than 50% when maintained in the atmosphere at 1,100‹C for 300 hours. ® KIPO & WIPO 2007 |
