Alkali-free glass and preparation thereof
US8871663B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Feb 20, 2014 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Feb 20, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C3/087
- 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 68 to 75 wt % of SiO2; 1 to 3 wt % of B2O3; 4 to 13 wt % of Al2O3; 1 to 6 wt % of MgO; 1 to 11 wt % of CaO; 4 to 9 wt % of SrO; and 3 to 7 wt % of BaO, based on the total weight of oxides present therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.