US 11,905,209 B2
Ion exchangeable alkali aluminosilicate glass compositions having improved mechanical durability
Shuo Cui, Burlington, MA (US); Xiaoju Guo, Pittsford, NY (US); Peter Joseph Lezzi, Corning, NY (US); and Jian Luo, Painted Post, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Dec. 18, 2022, as Appl. No. 18/083,527.
Application 18/083,527 is a continuation of application No. 17/100,293, filed on Nov. 20, 2020, granted, now 11,584,681.
Claims priority of provisional application 63/055,274, filed on Jul. 22, 2020.
Claims priority of provisional application 62/940,452, filed on Nov. 26, 2019.
Prior Publication US 2023/0127596 A1, Apr. 27, 2023
Int. Cl. C03C 3/097 (2006.01); C03C 21/00 (2006.01); C03C 3/091 (2006.01); C03C 3/083 (2006.01); C03C 4/18 (2006.01)
CPC C03C 3/097 (2013.01) [C03C 3/083 (2013.01); C03C 3/091 (2013.01); C03C 4/18 (2013.01); C03C 21/002 (2013.01); C03C 2204/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A glass composition comprising:
greater than or equal to 55.0 mol % and less than or equal to 65.0 mol % SiO2;
greater than or equal to 14.0 mol % and than or equal to 20.0 mol % Al2O3;
greater than or equal to 0.0 mol % and less than or equal to 3.0 mol % P2O3;
greater than or equal to 1.0 mol % and less than or equal to 7.0 mol % B2O3;
greater than or equal to 5.0 mol % and less than or equal to 10.0 mol % Li2O;
greater than or equal to 5.0 mol % and less than or equal to 10.0 mol % Na2O; and
greater than or equal to 0.0 mol % and less than or equal to 1.0 mol % K2O,
wherein:
R2O is in the range from greater than or equal to 13.0 mol % to less than or equal to 20.0 mol %, wherein R2O is the sum of alkali metal oxides in the glass composition;
Al2O3+R2O is in the range from greater than or equal to 28.0 mol % to less than or equal to 40.0 mol %; and
−0.1≤(Al2O3—(R2O+RO))/Li2O≤0.3, wherein RO is the sum of alkaline earth metal oxides in the glass composition,
wherein the glass composition has a softening point in the range from greater than or equal to 650.0° C. to less than or equal to 850.0° C.