High transmittance glass sheet and method of manufacturing the same
AssigneeNippon Sheet Glass Co., Ltd.
InventorsAkihiro Koyama, Isamu Kuroda, Nobuyuki Yamamoto, Yasunori Seto
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Abstract
A high transmittance glass sheet is provided that is formed of a soda-lime-silica glass composition containing, expressed in wt. %, less than 0.020% of total iron oxide in terms of Fe2O3 and 0.006 to 2.0% of zinc oxide. The glass sheet allows the formation of nickel sulfide particles to be suppressed by the addition of a zinc compound to a glass raw material.
Claims2
A method of manufacturing a soda-lime glass comprising zinc oxide and iron oxide (expressed as total iron oxide) wherein formation of nickel sulfide particles is suppressed in said glass, comprising adding a zinc compound to glass raw materials and melting said glass raw materials;
- wherein the soda lime glass is formulated by either:
- decreasing a content of the zinc oxide within a range of 0.006 to 2.0 wt. %, when the content of total iron oxide (in terms of Fe2O3) in a glass is increased within a range of 0.005 wt. % to 0.06 wt. %, or
- increasing the content of the zinc oxide within a range of 0.006 to 2.0 wt. %, when the content of total iron oxide (in terms of Fe2O3) in a glass is decreased within a range of 0.005 wt. % to 0.06 wt. %,
- thereby suppressing formation of nickel sulfide particles in the glass and
- whereby the soda-lime glass exhibits high transmittance with a visible light transmittance of 90.0% or higher on a basis of a 4.0 mm thick glass sheet.
A method of manufacturing a soda-lime glass comprising zinc oxide and iron oxide (expressed as total iron oxide) wherein formation of nickel sulfide particles is suppressed in said glass, comprising adding a zinc compound to glass raw materials and melting said glass raw materials;
- wherein the soda-lime glass is formulated by either:
- decreasing a content of the zinc oxide within a range of 0.006 to 2.0 wt. %, when a content of total iron oxide (in terms of Fe2O3) in a glass is increased within a range of 0.005 wt. % to 0.02 wt. %, or
- increasing the content of the zinc oxide within a range of 0.006 to 2.0 wt. %, when a content of total iron oxide (in terms of Fe2O3) in a glass is decreased within a range of 0.005 wt. % to 0.02 wt. %,
- thereby suppressing formation of nickel sulfide particles in the glass and
- whereby the soda-lime glass exhibits high transmittance with a visible light transmittance of 90.0% or higher on a basis of a 4.0 mm thick glass sheet.
Dependencies are inferred from the claim text.