| 摘要 |
Provided are: a glass substrate that achieves a high strain point while having a low devitrification temperature; and a method for producing said glass substrate. This glass substrate for a display is made of a glass comprising SiO2 and Al2O3, comprising 0% or more to less than 4% B2O3 as expressed in mass%, and substantially comprising no Sb2O3, wherein 3×BaO/(MgO+CaO+SrO) is 5 or less, MgO/(CaO+SrO) is 0.36 or greater, the devitrification temperature is 1235°C or lower, and the strain point is 700°C or higher. This method for producing said glass substrate for a display comprises: a melting step for melting, by using at least direct ohmic heating, a glass material prepared to have a predetermined composition; a molding step for molding, into a flat glass sheet, the molten glass that has been melted in the melting step; and an annealing step for annealing the flat glass sheet, wherein a condition for cooling the flat glass sheet is controlled such that the heat shrinkage rate of the flat glass sheet is reduced. |
