abstract |
A ceramic having a low thermal expansion coefficient and excellent mechanical strength is provided. The present invention includes aluminum magnesium titanate and alumina, and the elemental composition ratio of Al, Mg and Ti is expressed by the composition formula (1). Al 2 (1-x) Mg x Ti (1 + x) O 5 + aAl 2 O 3 (1) The aluminum magnesium titanate-alumina composite ceramic is characterized in that x satisfies 0 <x ≦ 1 and a satisfies 0.4x ≦ a <2x. [Selection figure] None |