US 11,840,475 B2
Colored glass-ceramics having petalite and lithium silicate structures
George Halsey Beall, Big Flats, NY (US); Qiang Fu, Painted Post, NY (US); and Charlene Marie Smith, Corning, NY (US)
Assigned to Corning Incorporated, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Jul. 14, 2022, as Appl. No. 17/864,693.
Application 17/864,693 is a continuation of application No. 16/884,825, filed on May 27, 2020, granted, now 11,390,558.
Claims priority of provisional application 62/853,953, filed on May 29, 2019.
Prior Publication US 2022/0356111 A1, Nov. 10, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C03C 10/00 (2006.01); C03C 1/04 (2006.01); C03C 4/02 (2006.01)
CPC C03C 10/0027 (2013.01) [C03C 1/04 (2013.01); C03C 4/02 (2013.01); C03C 2204/00 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A glass-ceramic article comprising:
a petalite crystalline phase;
a lithium silicate crystalline phase; and
one or more colorants selected from the group consisting of TiO2, Fe2O3, NiO, Co3O4, MnO2, Cr2O3, Au, and V2O5,
wherein a weight percentage of each of the petalite crystalline phase and the lithium silicate crystalline phase in the glass-ceramic article are greater than each of the weight percentages of other crystalline phases present in the glass-ceramic article; and
wherein the glass-ceramic article has a transmittance color coordinate in CIELAB color space of:
L*=from 20 to 90;
a*=from −20 to 40; and
b*=from −60 to 60
for a CIE illuminant F02 under SCI UVC conditions.