Alkali-free glass and preparation thereof
US8895462B2 · kind B2 · utility
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5References
12Claims
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Key dates
| Filing date | Sep 4, 2013 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | Sep 4, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C3/091
- 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 46 to 57 wt % of SiO2; 3.5 to 7.5 wt % of B2O3; 21 to 29 wt % of Al2O3; 3 to 14 wt % of MgO; 11 to 16 wt % of CaO; and 1 to 5 wt % of SrO, based on the total weight of oxides present therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.