US 11,814,316 B2
Ion exchangeable Li-containing glass compositions for 3-D forming
Marie Jacqueline Monique Comte, Fontenay aux Roses (FR); Melinda Ann Drake, Corning, NY (US); Karen Leslie Geisinger, Big Flats, NY (US); Sinue Gomez, Corning, NY (US); Robert Michael Morena, Lindley, NY (US); Charlene Marie Smith, Corning, NY (US); and Randall Eugene Youngman, Horseheads, NY (US)
Assigned to Corning Incorporated, Corning, NY (US)
Filed by Corning Incorporated, Corning, NY (US)
Filed on Sep. 15, 2021, as Appl. No. 17/475,422.
Application 17/475,422 is a division of application No. 16/181,893, filed on Nov. 6, 2018, granted, now 11,124,444.
Application 16/181,893 is a division of application No. 14/824,653, filed on Aug. 12, 2015, granted, now 10,150,691, issued on Dec. 11, 2018.
Application 14/824,653 is a division of application No. 13/938,579, filed on Jul. 10, 2013, granted, now 9,139,469, issued on Sep. 22, 2015.
Claims priority of provisional application 61/672,346, filed on Jul. 17, 2012.
Prior Publication US 2022/0002187 A1, Jan. 6, 2022
Int. Cl. C03C 3/091 (2006.01); C03C 21/00 (2006.01); C03C 3/097 (2006.01); C03C 3/089 (2006.01); C03C 3/083 (2006.01); C03C 3/085 (2006.01); C03C 3/087 (2006.01); C03C 3/093 (2006.01); C03C 4/18 (2006.01)
CPC C03C 3/097 (2013.01) [C03C 3/083 (2013.01); C03C 3/085 (2013.01); C03C 3/087 (2013.01); C03C 3/089 (2013.01); C03C 3/091 (2013.01); C03C 3/093 (2013.01); C03C 4/18 (2013.01); C03C 21/002 (2013.01); Y10T 428/315 (2015.01)] 4 Claims
 
1. A glass article comprising:
from about 55 mol. % to about 68 mol. % SiO2;
from about 9 mol. % to about 15 mol. % Al2O3;
from about 4.5 mol % to about 12 mol. % B2O3;
from about 1 mol. % to about 7 mol. % Li2O;
from about 3 mol. % to about 12 mol. % Na2O; and
from greater than 0 mol. % to about 3 mol. % K2O, wherein R2O is a sum of a concentration of Li2O, a concentration of Na2O, and a concentration of K2O, and a ratio of R2O to a concentration of Al2O3 is less than or equal to about 1.15, the glass article having:
a softening point less than or equal to about 810° C.;
a high temperature CTE less than or equal to about 27×10−6/° C.; and
a compressive stress greater than or equal to about 600 MPa and a depth of layer greater than or equal to about 25 μm after ion exchange in a salt bath comprising KNO3 in a temperature range from about 390° C. to about 450° C. for less than or equal to approximately 15 hours, wherein at least after the ion exchange the glass article comprises greater than 0 mol. % K2O.