US 12,234,175 B1
Glass parts and gob-pressing methods for making such
Richard Dominic Bomba, Rochester, NY (US); Cyril Rémy André Dedieu, Hericy (FR); Arnaud Dominique Dejean, Vaux le Penil (FR); Allan Mark Fredholm, Vulaines sur Seine (FR); Anne-Claire Jeanson, Avon (FR); David John McEnroe, Wellsville, NY (US); Mathieu Mondésir, Egreville (FR); Galan Gregory Moore, Henrietta, NY (US); Aniello Mario Palumbo, Painted Post, NY (US); David Sampaio, Nemours (FR); Thomas Matthew Sonner, Corning, NY (US); and Joseph William Soper, Arkport, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on May 29, 2024, as Appl. No. 18/677,404.
Claims priority of provisional application 63/634,535, filed on Apr. 16, 2024.
Int. Cl. C03B 11/10 (2006.01); C03B 11/12 (2006.01); C03C 3/083 (2006.01)
CPC C03B 11/10 (2013.01) [C03B 11/122 (2013.01); C03C 3/083 (2013.01)] 18 Claims
OG exemplary drawing
 
17. A method of making a glass part, comprising:
gob-pressing glass to form the glass part, wherein the gob-pressing comprises pressing a gob of molten glass with a piston into a mold such that the gob spreads outward in the mold to form the molten glass to a shape of the glass part,
wherein the shape comprises first and second major surfaces facing away from one another and a thickness orthogonal to the first and second major surfaces and extending therebetween, wherein the shape comprises a geometric centroid, and wherein the shape has length and width aligned with the first and second major surfaces and orthogonal to one another;
wherein the first and second major surfaces each have an area of at least 4 cm2 and the thickness for at least a portion of the shape between the major surfaces is less than 2 mm;
wherein the thickness for the portion of the shape is a first thickness and wherein the shape comprises a second thickness that is greater than the first thickness;
wherein the second thickness is located at least 1 cm away from the geometric centroid;
wherein a cross-sectional potion of the shape between the first and second major surfaces extending along a 2 cm linear path varies in thickness less than 100 μm;
wherein the shape comprises curvature of at least a portion of surfaces thereof that comprises a radius of curvature of less than 1 m;
wherein the length of the shape is greater than the width;
wherein the glass of the glass part is an aluminosilicate, comprising in molar percentage on an oxide basis at least 40 mol % silica and no more than 80 mol % silica, and at least 2 mol % alumina and no more than 30 mol % alumina;
wherein the glass has a dielectric constant Dk at 10 GHz less than or equal to 6.8;
wherein the glass comprises a colorant selected from the group consisting of Au, Ag, Cr2O3, transition metal oxides, and rare earth metal oxides;
wherein the glass further comprises transmittance through at least a portion of the thickness with color coordinate in CIELAB color space of L* greater than or equal to 55 and less than or equal to 98.5, a* greater than or equal to −10 and less than or equal to 25, and b* greater than or equal to −20 and less than or equal to 5 under F2 illumination and a 10° standard observer angle; and
heat treating the glass of the glass part to grow crystals therein, wherein the crystals comprise lithium disilicate.