Glass and chemically toughened glass using same
US10196304B2 · kind B2 · utility
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Key dates
| Filing date | Dec 20, 2016 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | Dec 20, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C21/002
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An object is to provide a glass for chemical toughening treatment satisfying low brittleness, low melt viscosity and high chemical toughening characteristics, and a chemically toughened glass using the same. Provided is a glass for chemical toughening treatment containing, in mass % in terms of oxides, SiO2 63 to 76, B2O3 0 to 2, Al2O3 2 to 10, MgO 2 to 12, CaO 0.1 to 8, Na2O 14.5 to 19, K2O 0 to 3, and Fe2O3 0 to 0.5, satisfying a total content of alkali earth metal oxides (RO) being from 5 to 15, satisfying 15×MgO/RO−RO≥3, and having a temperature T2 at which a glass viscosity reaches 102 dPa·s being 1,600° C. or lower.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.