US 12,187,639 B2
Glasses and glass ceramics including a metal oxide concentration gradient
Guangli Hu, Berkeley Heights, NJ (US); Charlene Marie Smith, Corning, NY (US); Zhongzhi Tang, Shenzhen (CN); and Steven Alvin Tietje, Lindley, NY (US)
Assigned to Corning Incorporated, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Aug. 30, 2022, as Appl. No. 17/899,168.
Application 17/147,663 is a division of application No. 17/024,203, filed on Sep. 17, 2020, granted, now 11,220,456, issued on Jan. 11, 2022.
Application 16/835,789 is a division of application No. 14/878,429, filed on Oct. 8, 2015, granted, now 10,730,791, issued on Aug. 4, 2020.
Application 17/899,168 is a continuation of application No. 17/147,663, filed on Jan. 13, 2021, granted, now 11,465,937.
Application 17/024,203 is a continuation of application No. 16/835,789, filed on Mar. 31, 2020, granted, now 11,459,270.
Claims priority of provisional application 62/194,967, filed on Jul. 21, 2015.
Claims priority of provisional application 62/171,110, filed on Jun. 4, 2015.
Claims priority of provisional application 62/117,585, filed on Feb. 18, 2015.
Claims priority of provisional application 62/061,372, filed on Oct. 8, 2014.
Prior Publication US 2023/0015444 A1, Jan. 19, 2023
Int. Cl. C03C 21/00 (2006.01); C03C 3/091 (2006.01); C03C 3/093 (2006.01); C03C 3/097 (2006.01); C03C 10/00 (2006.01); C03C 23/00 (2006.01)
CPC C03C 21/002 (2013.01) [C03C 3/091 (2013.01); C03C 3/093 (2013.01); C03C 3/097 (2013.01); C03C 10/00 (2013.01); C03C 10/0027 (2013.01); C03C 23/007 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A glass article comprising:
SiO2 in an amount from 55 mol % to 70 mol %;
Al2O3 in an amount from 10 mol % to 30 mol %;
from 10 mol % to 20 mol % R2O, wherein R2O is Li2O+K2O+Na2O;
a non-zero amount of Li2O up to 15 mol %;
a non-zero amount of Na2O up to 14 mol %;
a non-zero amount of K2O up to 2 mol %;
P2O5 in an amount from 0.1 mol % to 8 mol %;
from 0.1 mol % to 1.5 mol % of MgO+CaO+ZnO, wherein the amounts of MgO, ZnO, and CaO are non-zero; and
B2O3 in an amount from 0 mol % to 4 mol %, wherein a ratio of Li2O to R2O is 0.5-1.0.