Patent ID: 8785336

Claim:
An alkali-free glass, comprising, as a glass composition in terms of mass %, 55 to 80% of SiO 2 , 10 to 25% of Al 2 O 3 , 2to 5.5% of B 2 O 3 , 4 to 8% of MgO, 3 to 7.5% of CaO, 0 to 5% of SrO, 0.5 to 7% of BaO, and 0 to 2% of ZnO, having a molar ratio MgO/CaO of 0.5 to 1.3, being substantially free of alkali metal oxides, having a Young's modulus of more than 80 GPa, having a liquidus temperature of 1,195° C. or less, and having an average thermal expansion coefficient in a temperature range of 30 to 380° C. of 30 to 44.2×10 −7 /° C.