Crystallized glass
AssigneeKabushiki Kaisha Ohara
InventorsSAYA KIKKAWA, TOSHITAKA YAGI
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Abstract
A crystallized glass containing, in mass % on an oxide basis, a SiO2 component: 40.0 to 55.0%, an Al2O3 component: 10.0 to 30.0%, a MgO component: 10.0 to 30.0%, a TiO2 component: 5.0 to 15.0%, a Li2O component: more than 0 to 5.0%, and a Na2O component: more than 0 to 8.0%, in which a total content of the Li2O component, the Na2O component, and the K2O component [content of Li2O component+content of Na2O component+content of K2O component] is more than 0 to 12.0%, a Vickers hardness (Hv) is 700 or more, and a spectral transmittance at 400 nm measured for a 1 mm thick sample is 60% or more.
Claims5
A crystallized glass comprising, in mass % on an oxide basis:
- a SiO2 component:
- 40.0 to 55.0%,
- an Al2O3 component:
- 10.0 to 30.0%,
- a MgO component:
- 10.0 to 30.0%,
- a TiO2 component:
- 5.0 to 15.0%,
- a Li2O component:
- more than 0 to 5.0%, and
- a Na2O component:
- more than 0 to 8.0%, wherein
- a total content of the Li2O component, the Na2O component, and the K2O component [content of Li2O component+content of Na2O component+content of K2O component] is more than 0 to 12.0%,
- a Vickers hardness (Hv) is 700 or more, and
- a spectral transmittance at 400 nm measured for a 1 mm thick sample is 60% or more.
Dependencies are inferred from the claim text.