METHOD FOR MANUFACTURING ALKALI-FREE GLASS
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Jun 6, 2014
filing date -
Dec 6, 2011
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Abstract
A method for manufacturing an alkali-free glass includes heating the glass raw material at a temperature of 1,400 to 1,800° C. in a melting furnace to thereby prepare a molten glass, and forming the molten glass into a sheet shape, wherein heating by combustion flame of a burner and electrical heating of the molten glass by a heating electrode arranged so as to be dipped in the molten glass in the melting furnace are used in combination in the heating in the melting furnace, and when an electrical resistivity of the molten glass at 1,400° C. is Rg (Ωcm) and an electrical resistivity of a refractory constituting the melting furnace at 1,400° C. is Rb (Ωcm), the glass raw material and the refractory are selected so as to satisfy Rb>Rg.
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