Alkali-free glass and preparation thereof
US8962502B2 · kind B2 · utility
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3References
14Claims
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Key dates
| Filing date | Oct 16, 2013 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Oct 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides the composition of an alkali-free glass composition containing no alkali metal oxide and the preparation thereof. The alkali-free glass comprising substantially no alkali metal oxide according to the present invention comprises 61 to 73 wt % of SiO2; 0.5 to 3.9 wt % of B2O3; 3.5 to 13.5 wt % of Al2O3; 9 to 13 wt % of MgO; 1 to 8 wt % of CaO; and 4 to 10 wt % of SrO, based on the total weight of oxides present therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.