US 11,053,162 B2
Lithium containing glass or glass ceramic article with modified K2O profile near the glass surface
Ryan Claude Andrews, Elmira, NY (US); Jill Marie Hall, Campbell, NY (US); Pascale Oram, Hammondsport, NY (US); Rostislav Vatchev Roussev, Painted Post, NY (US); Vitor Marino Schneider, Painted Post, NY (US); and Ljerka Ukrainczyk, Painted Post, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Appl. No. 15/750,051
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Feb. 2, 2017, PCT No. PCT/US2017/016249
§ 371(c)(1), (2) Date Feb. 2, 2018,
PCT Pub. No. WO2018/143991, PCT Pub. Date Aug. 9, 2018.
Prior Publication US 2019/0389764 A1, Dec. 26, 2019
Int. Cl. B32B 15/04 (2006.01); B32B 17/06 (2006.01); C03C 10/00 (2006.01); C03C 3/085 (2006.01); C03C 3/097 (2006.01); C03C 21/00 (2006.01)
CPC C03C 10/0018 (2013.01) [C03C 3/085 (2013.01); C03C 3/097 (2013.01); C03C 21/002 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An alkali aluminosilicate glass article comprising:
Li2O, Na2O, and K2O;
a compressive stress layer extending from a surface of the alkali aluminosilicate glass to a depth of compression (DOC);
a tensile region extending from the depth of compression into the glass article and having a maximum tensile stress of at least about 40 MPa;
a K2O concentration profile comprising a portion wherein a K2O concentration increases to a local K2O concentration maximum; and wherein the local K2O concentration maximum has a K2O concentration of 0.5% to 15% of the K2O concentration at the surface of the alkali aluminosilicate glass article.