| 摘要 |
[Problem] To provide a composite plate comprising a zirconia sintered body and a base material, or a zirconia sintered body and a base material comprising at least one among a group includes strengthened glass, Bakelite, aluminum, andmagnesium, said composite plate being capable of being suitably used in a case or a watch member, etc, for a mobile electronic device that is light weight and has excellent shock resistance and abrasion resistance. [Solution] A composite plate having a thickness of no more than 2 mm, and having laminated therein a zirconia sintered body, an adhesive layer, and a base material, the elasticity of the base material being no more than 100 GPa, and the apparent density of the composite plate being no more than 4.3 g/cm 3 ; or a composite plate having a thickness of no more than 2 mm and includes, laminated in order, a zirconia sintered body, an adhesive layer, and a base material includes at least one type among a group includes strengthened glass, Bakelite, aluminum, andmagnesium, the thickness ratio (zirconia sintered body thickness/base material thickness) between the zirconia sintered body and the base material being 0.1-1, and the apparent density of the composite plate being no more than 4.3 g/cm 3 . |
