US 12,391,604 B2
High strength, scratch resistant and transparent glass-based materials
George Halsey Beall, Big Flats, NY (US); Marie Jacqueline Monique Comte, Fontenay aux Roses (FR); and Paulo Jorge Gaspar Marques, Herblay sur Seine (FR)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Oct. 27, 2023, as Appl. No. 18/384,485.
Application 18/384,485 is a continuation of application No. 18/220,885, filed on Jul. 12, 2023.
Application 18/220,885 is a continuation of application No. 17/582,581, filed on Jan. 24, 2022, granted, now 11,739,021, issued on Aug. 29, 2023.
Application 17/582,581 is a continuation of application No. 15/077,036, filed on Mar. 22, 2016, granted, now 11,267,747, issued on Mar. 8, 2022.
Claims priority of provisional application 62/186,547, filed on Jun. 30, 2015.
Claims priority of provisional application 62/137,345, filed on Mar. 24, 2015.
Prior Publication US 2024/0051867 A1, Feb. 15, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. C03C 10/00 (2006.01); C03C 3/085 (2006.01); C03C 3/091 (2006.01); C03C 3/093 (2006.01); C03C 4/00 (2006.01); C03C 21/00 (2006.01)
CPC C03C 10/0009 (2013.01) [C03C 3/085 (2013.01); C03C 3/091 (2013.01); C03C 3/093 (2013.01); C03C 4/0092 (2013.01); C03C 10/0045 (2013.01); C03C 10/0054 (2013.01); C03C 21/002 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A glass-ceramic material, comprising:
a glass phase comprising at least one of a soda lime glass, an alkali aluminosilicate glass, and a lithium alumina silicate glass;
a crystalline phase dispersed within the glass phase, wherein the crystalline phase comprises petalite and at least one of mullite, spinel, β-quartz, lithium disilicate, β-spodumene, nepheline, and alumina;
wherein crystallites of the crystalline phase have a major dimension less than 100 nm;
wherein the crystallites of the crystalline phase are sufficiently small in dimension to provide transparency to the glass-ceramic material;
wherein the transparency is such that the glass-ceramic material has transmittance of at least 88%/mm over a visible spectrum ranging from 400 nm to 700 nm;
wherein a difference in refractive index between the glass phase and the crystalline phase is less than 0.5; and
wherein the glass-ceramic material has a fracture toughness of at least 0.9 MPa·m1/2.