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US 2022/0024805 A1Published application
Alkali-free glass and glass plate
AssigneeAGC Inc.
InventorsYusaku MATSUO, Kazutaka ONO
Life of this patent
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Abstract
An alkali-free glass includes, as represented by mole percentage based on oxides, SiO2: 57 to 70%, Al2O3: 5 to 15%, B2O3: 15 to 24%, MgO: 0.2 to 10%, CaO: 0.1 to 7%, SrO: 0.1 to 2.5%, BaO: 0 to 10%, and ZnO: 0 to 0.1%, or includes, as represented by mole percentage based on oxides, SiO2: 57 to 70%, Al2O3: 5 to 15%, B2O3: 15 to 24%, MgO: 0.1 to 10%, CaO: 0.1 to 10%, SrO: 0.1 to 10%, BaO: 0.1 to 10%, and ZnO: 0 to 0.1%. Formula (A) is [Al2O3]/[B2O3], and a value of the formula (A) is larger than 0.35 and 1.4 or smaller.
Claims29
An alkali-free glass comprising, as represented by mole percentage based on oxides,
- SiO2:
- 57 to 70%,
- Al2O3:
- 5 to 15%,
- B2O3:
- 15 to 24%,
- MgO:
- 0.2 to 10%,
- CaO:
- 0.1 to 7%,
- SrO:
- 0.1 to 2.5%,
- BaO:
- 0 to 10%, and
- ZnO:
- 0 to 0.1%,
- or comprising, as represented by mole percentage based on oxides,
- SiO2:
- 57 to 70%,
- Al2O3:
- 5 to 15%,
- B2O3:
- 15 to 24%,
- MgO:
- 0.1 to 10%,
- CaO:
- 0.1 to 10%,
- SrO:
- 0.1 to 10%,
- BaO:
- 0.1 to 10%, and
- ZnO:
- 0 to 0.1%,
- wherein formula (A) is [Al2O3]/[B2O3], and a value of the formula (A) is larger than 0.35 and 1.4 or smaller.
31 more elements
Dependencies are inferred from the claim text.