| abstract |
A glass article including, on an oxide basis, from 60 mol % to 74 mol % SiO 2 , from 7 mol % to 18 mol % Al 2 O 3 , from 3 mol % to 16 mol % B 2 O 3 , from 0 mol % to 6 mol % Na 2 O, from 0 mol % to 5 mol % P 2 O 5 , from 5 mol % to 11 mol % Li 2 O, less than or equal to 0.2 mol % SnO 2 , and from 0.5 mol % to 6.5 mol % divalent cation oxides. The glass article has a molar ratio of Al 2 O 3 :(R 2 O+RO) greater than or equal to 0.9, where R 2 O is a sum of alkali metal oxides in mol % and RO is a sum of divalent cation oxides in mol %. |