GLASS-CERAMIC COMPOSITIONS AND LAMINATED GLASS ARTICLES INCORPORATING THE SAME

摘要

According to one embodiment, a glass-ceramic composition may include from about 60 mol.% to about 75 mol.% SiO2; from about 5 mol.% to about 10 mol.% AI2O3; from about 2 mol.% to about 20 mol.% alkali oxide R2O, the alkali oxide R2O including Li20 and Na2O; and from 0 mol.% to about 5 mol.% alkaline earth oxide RO, the alkaline earth oxide RO including MgO. A ratio of Al2O3 (mol.%)) to the sum of (R2O(mol.%) + RO (mol.%)) may be less than 1 in the glass-ceramic composition. A major crystalline phase of the glass-ceramic composition may be Li2Si2O5. A liquidus viscosity of the glass-ceramic composition may be greater than 35 kP. The glass-ceramic composition may be used to form the glass clad layer(s) of a laminated glass article.