Patent ID: 11919801
Assignee: CORNING INCORPORATED
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 15:
16. A method of making a glass-ceramic material, comprising:
ceramming a glass to produce a glass phase and ceramic phase dispersed within the glass phase, thereby forming the glass-ceramic material;
wherein the glass-ceramic material has a transmittance of at least 88%/mm over a visible spectrum ranging from 400 nm to 700 nm,
wherein the ceramic phase comprises at least one of mullite, spinel, β-quartz, petalite, lithium disilicate, β-spodumene, nepheline, and alumina,
wherein the glass phase comprises at least one of a soda lime glass, an alkali aluminosilicate glass, and a lithium alumina silicate glass, and
wherein the glass-ceramic material has a fracture toughness of at least 0.9 MPa·m1/2,
wherein a difference in refractive index between the glass phase and the ceramic phase is less than 0.5 and greater than 0.025,
wherein the ceramic phase comprises particles having a mean size in a range from 5 nm to 200 nm.