Lithium disilicate glass-ceramic compositions and methods thereof
AssigneeCorning Incorporated
InventorsHuayun Deng, Qiang Fu, John Christopher Mauro
Life of this patent
Estimating the term…
Abstract
A glass-ceramic composition as defined herein. The glass-ceramic composition includes a first crystalline phase comprising lithium disilicate. The glass-ceramic composition can include up to 10 wt % CaO, up to 5 wt % Na2O, up to 10 wt % B2O3, and greater than 0.5 wt % ZrO2. The glass-ceramic composition can also include from 50 to 75 wt % SiO2, from 1 to 5 wt % Al2O3, from 1 to 8 wt % P2O5, and from 5 to 20 wt % Li2O. In aspects, the glass-ceramic composition can include a second crystalline phase including wollastonite, apatite, cristobalite, β-quartz, lithiophosphate, or a combination thereof. Also disclosed are methods of making and using the disclosed compositions.
Claims20
A glass-ceramic article, comprising:
- a first crystalline phase comprising lithium disilicate;
- a second crystalline phase selected from a group consisting of:
- wollastonite, apatite, cristobalite, β-quartz, lithiophosphate, or a combination thereof;
- and
- a glass-ceramic composition comprising, based on a 100 wt % total of the glass-ceramic composition:
- 50 to 75 wt % SiO2,
- 1 to 5 wt % Al2O3,
- 1 to 8 wt % P2O5,
- up to 10 wt % CaO,
- 5 to 20 wt % Li2O,
- up to 5 wt % Na2O,
- greater than 0.5 wt % ZrO2, and
- up to 10 wt % B2O3.
Dependencies are inferred from the claim text.