US 9,809,487 B2
Glasses having improved toughness and scratch resistance
Matthew John Dejneka, Corning, NY (US); Adam James Ellison, Corning, NY (US); Sinue Gomez, Corning, NY (US); and Robert Michael Morena, Lindley, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Filed by Corning Incorporated, Corning, NY (US)
Filed on Feb. 12, 2015, as Appl. No. 14/620,832.
Application 14/620,832 is a continuation of application No. 12/277,573, filed on Nov. 25, 2008, granted, now 8,969,226.
Claims priority of provisional application 61/004,677, filed on Nov. 29, 2007.
Prior Publication US 2015/0203396 A1, Jul. 23, 2015
This patent is subject to a terminal disclaimer.
Int. Cl. C03C 3/093 (2006.01); C03C 3/091 (2006.01); C03C 21/00 (2006.01); C03C 4/18 (2006.01)
CPC C03C 3/093 (2013.01) [C03C 3/091 (2013.01); C03C 4/18 (2013.01); C03C 21/00 (2013.01); C03C 2204/00 (2013.01); Y10T 428/26 (2015.01)] 21 Claims
 
1. A silicate glass, the silicate glass being ion exchangeable and comprising: 62-70 mol % SiO2; 0-18 mol % Al2O3; >0-10 mol % B2O3; 0-15 mol % Li2O; 6-20 mol % Na2O; 0-18 mol % K2O; >0-17 mol % MgO; and ZrO2, wherein 16 mol %≤Al2O3 +B2O3 +ZrO2≤29 mol %; 14 mol %≤R2O +R′O≤25 mol %; and -15 mol %≤(R2O +R′O—Al2O3—ZrO2)—B2O3≤4 mol %, where R is at least one of Li, Na, K, Rb, and Cs, and R′ is at least one of Mg, Ca, Sr, and Ba.