Method for producing glass for display substrate
OwnerTatsuya Takaya, Masahiro Tomamotoinventors
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Abstract
A glass for a display substrate composed of 50 to 70% SiO2, 10 to 25% Al2O3, 8.4 to 20% B2O3, 0 to 10% MgO, 6 to 15% CaO, 0 to 10% BaO, 0 to 10% SrO, 0 to 10% ZnO, 0 to 5% TiO2, 0 to 5% P2O5, 0.01 to 0.2% alkali metal, and from 0.01% to less than 0.4% ZrO2, as expressed in % by mass. The glass can have a β-OH value of 0.20/mm or more and an area of 0.1 m2 or more. The glass is produced by mixing raw materials to provide the SiO2, Al2O3, B2O3, MgO, CaO, BaO, SrO, ZnO, TiO2, P2O5 and alkali metal contents, electrically melting the raw materials in a melting furnace constructed of a high zirconia refractory; and refining, homogenizing and forming the glass melt.
Claims22
A glass for a display substrate comprising 50 to 70% of SiO2, 10 to 25% of Al2O3, 8.4 to 20% of B2O3, 0 to 10% of MgO, 6 to 15% of CaO, 0 to 10% of BaO, 0 to 10% of SrO, 0 to 10% of ZnO, 0 to 5% of TiO2, 0 to 5% of P2O5, 0.01 to 0.2% of an alkali metal, and from 0.01% to less than 0.4% of ZrO2, as expressed in % by mass.
A method for producing a glass for a display substrate comprising the steps of:
- preparing glass raw materials mixed so that the glass comprises 50 to 70% of SiO2, 10 to 25% of Al2O3, 8.4 to 20% of B2O3, 0 to 10% of MgO, 6 to 15% of CaO, 0 to 10% of BaO, 0 to 10% of SrO, 0 to 10% of ZnO, 0 to 5% of TiO2, 0 to 5% of P2O5;
- electrically melting the glass raw materials in a melting furnace constructed of a high zirconia refractory;
- and
- refining, homogenizing and forming the glass melt;
- wherein the glass raw materials are mixed so that an alkali content of the resultant glass is 0.01 to 0.2% as expressed in % by mass.
Dependencies are inferred from the claim text.