Patent ID: 8883665

Claim:
An alkali-free glass comprising oxides, the oxides consisting of, based on the total weight of oxides present therein, 64 to 70 wt % of SiO 2 ; 1 to 3.5 wt % of B 2 O 3 ; 1 to 13 wt % of Al 2 O 3 ; 10.1 to 14 wt % of MgO; 1 to 3 wt % of CaO; 4 to 7 wt % of SrO; and 0.5 to 7 wt % of BaO, wherein the alkali-free glass has a temperature less than 1590° C. at a viscosity of 10 2 dPas and a temperature less than 1240° C. at a viscosity of 10 4 dPas.