| 摘要 |
PURPOSE: Provided are a high transmittance glass sheet that allows the formation of nickel sulfide (NiS) in a process of melting a glass raw material to be suppressed effectively and a method for producing the same. CONSTITUTION: The high transmittance glass sheet formed of a soda-lime-silica glass composition comprises less than 0.020 wt% of total iron oxide in terms of Fe2O3 and 0.006 to 2.0 wt% of zinc oxide. Where an x-coordinate axis indicates a content of the total iron oxide expressed in ppm and a y-coordinate axis indicates a content of the zinc oxide expressed in ppm, the glass composition has contents of the total iron oxide and the zinc oxide whose values fall within a range defined by a quadrilateral ABCD formed by connecting Point A(200,60), Point B(200,20000), Point C(50,20000), and Point D(50,180) in this order. The method of producing the high transmittance glass sheet includes adding a zinc compound to a glass raw material so that the content of zinc oxide in the high transmittance glass sheet is 0.006-2.0 wt.%; melting the glass raw material; and forming the high transmittance glass sheet. The zinc compound is at least one selected from zinc nitrate and zinc sulfate.
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