Glass ceramics comprising beta-quartz or beta-quartz solid solution
US7678720B2 · kind B2 · utility
4Cited by
7References
11Claims
0Family size
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Key dates
| Filing date | Oct 11, 2006 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Oct 11, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2204/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Glass-ceramics includes Li2O, Al2O3 and SiO2, have an average crystal grain diameter of a predominant crystal phase of 90 nm or below and have crystal grain diameter distribution of 20 nm or below. The glass-ceramics can be manufactured by heat treating glass comprising Li2O, Al2O3 and SiO2 under a temperature within a range from 650° C. to 750° C. and then further heat treating the glass under a temperature within a range from 700° C. to 800° C. for 100-200 hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.