Patent ID: 8652978

Claim:
A silicate glass, the silicate glass being ion exchangeable and comprising: a. alumina and boron oxide; and b. at least one alkali metal oxide, wherein −15 mol %≦(R 2 O+R′O—Al 2 O 3 —ZrO 2 )—B 2 O 3 ≦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; c. 10≦Al 2 O 3 +B 2 O 3 +ZrO 2 ≦30; and d. 14≦R 2 O+R′O≦25, wherein the silicate glass comprises 62-70 mol. % SiO 2 ; >0-18 mol % Al 2 O 3 ; >0-10 mol % B 2 O 3 ; 0-15 mol % Li 2 O; 6-14 mol % Na 2 O; 0-18 mol % K 2 O; 0-17 mol % MgO; 0-18 mol % CaO; and 0-5 mol % ZrO 2 .