Black beta-spodumene lithium silicate glass ceramics
US11352291B2 · kind B2 · utility
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Key dates
| Filing date | Nov 22, 2019 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | Jan 3, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2204/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A black β-spodumene lithium disilicate glass ceramic is provided. The glass ceramic includes at least one of magnetite, β-quartz, cristobalite, and lithium phosphate as a minor crystal phase. The glass ceramic is characterized by the color coordinates: L*: 15.0 to 35.0, a*: −3.0 to 3.0, and b*: −5.0 to 5.0. The glass ceramic may be ion exchanged. Methods for producing the glass ceramic are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.