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US 12,600,664 B2Granted
Glass-ceramics with high elastic modulus and hardness
AssigneeCorning Incorporated
InventorAlexandra Lai Ching Kao Andrews Mitchell
Life of this patent
Estimating the term…
Abstract
A composition includes 30 mol % to 60 mol % SiO2; 15 mol % to 40 mol % Al2O3; 5 mol % to 25 mol % Y2O3; 5 mol % to 15 mol % TiO2; and 0.1 mol % to 15 mol % RO, such that RO is a sum of MgO, CaO, SrO, and BaO.
Claims16
A method of making a glass-ceramic, comprising:
- first holding a precursor at a nucleation temperature, the precursor comprising SiO2, Al2O3, Y2O3, TiO2, and RO, where RO is a sum of MgO, CaO, SrO, and BaO and a ratio of RO (mol %) to Al2O3 (mol %) is 0.01 to 0.5;
- and
- then holding the precursor at a crystallization temperature to form the glass-ceramic, wherein the glass-ceramic comprises glass and crystals within the glass, the crystals comprising at least two phases wherein a first phase is Y2Ti2O7.
A method of making a glass-ceramic, comprising:
- internally nucleating the crystals in a precursor, the precursor comprising SiO2, Al2O3, Y2O3, TiO2, and RO, where RO is a sum of MgO, CaO, SrO, and BaO and a ratio of RO (mol %) to Al2O3 (mol %) is 0.01 to 0.5;
- and
- growing the crystals in the precursor to form the glass-ceramic, wherein the glass-ceramic comprises glass and crystals within the glass, the crystals comprising a phase of Y2Si2O7 and/or Y2Ti2O7.
A method of making a glass-ceramic, comprising:
- ceramming a precursor to grow crystals within the precursor to form the glass-ceramic, wherein:
- the precursor comprises SiO2, Al2O3, Y2O3, TiO2, and RO, where RO is a sum of MgO, CaO, SrO, and BaO and a ratio of RO (mol %) to Al2O3 (mol %) is 0.01 to 0.5;
- the crystals within the glass-ceramic comprise a phase of Y2Si2O7 and/or Y2Ti2O7, and
- the glass and the crystals together form a bulk, and the crystals are homogeneous throughout the bulk.
1 more element
Dependencies are inferred from the claim text.