Silicate glass, method for preparing silicate glass-ceramics by using the silicate glass, and method for preparing nano lithium disilicate glass-ceramics by using the silicate glass
US11759290B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2022 |
| Grant date | Sep 19, 2023 |
| Priority date | — |
| Expiry date | Jan 6, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2237/348
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a silicate glass, a method for preparing a silicate glass-ceramics by using the silicate glass, and a method for preparing a lithium disilicate glass-ceramics by using the silicate glass, and more particularly, to a method for preparing a glass-ceramics that has a nanosize of 0.2 to 0.5 μm and contains lithium disilicate and silicate crystalline phases. A nano lithium disilicate glass-ceramics containing a SiO2 crystalline phase includes: a glass composition including 70 to 85 wt % SiO2, 10 to 13 wt % Li2O, 3 to 7 wt % P2O5 working as a nuclei formation agent, 0 to 5 wt % Al2O3 for increasing a glass transition temperature and a softening point and enhancing chemical durability of glass, 0 to 2 wt % ZrO2, 0.5 to 3 wt % CaO for increasing a thermal expansion coefficient of the glass, 0.5 to 3 wt % Na2O, 0.5 to 3 wt % K2O, and 1 to 2 wt % colorants, and 0 to 2.0 wt % mixture of MgO, ZnO, F, and La2O3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.