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US 2023/0146789 A1Published application
Glass
AssigneeNippon Electric Glass Co., Ltd.
InventorAtsuki SAITO
Life of this patent
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Abstract
An alkali-free glass of the present invention includes as a glass composition, in terms of mass %, 55% to 70% of SiO2, 15% to 25% of Al2O3, 0% to 5% of B2O3, 3% to 10% of MgO, 7% to 20% of SrO, and 0% to 5% of BaO, is substantially free of an alkali metal oxide, and has a strain point of more than 720° C.
Claims11
A glass, comprising as a glass composition, in terms of mass %, 55% to 70% of SiO2, 15% to 25% of Al2O3, 0.08% to 5% of B2O3, 0% to 0.5% of Li2O+Na2O+K2O, 3% to 10% of MgO, 7% to 20% of SrO, and 0.1% to 5% of BaO, and having a strain point of more than 720° C.
Dependencies are inferred from the claim text.