| abstract |
Alkali aluminosilicate glasses that exhibit fast ion exchange performance and having low softening points that enable the glasses to be formed into non-planar, three-dimensional shapes. The glasses contain less than about 1 mol % of boron oxide and, in some embodiments, are substantially free of B 2 O 3 . Furthermore, these glasses have excess amounts of alkali oxides relative to both Al 2 O 3 and P 2 O 5 , in order to improve melting behavior and ion exchange performance while still achieving sufficiently low softening points to allow for formability. |