Dark yellow grey glass composition

Abstract

The invention relates to a float glass composition, particular to a grey glass composition, and specifically provides a dark yellow grey glass composition. The dark yellow grey glass composition comprises the following functional coloring components: total iron (Fe2O3), cerium dioxide (CeO2), titanium dioxide (TiO2), chromium sesquioxide (Cr2O3), cobalt oxide (CoO) and selenium (Se). The dark yellow gray glass composition adopted by the invention has solar transmittance of 20% or below, infrared transmittance of 25% or below, visible light transmittance of 20% or below and ultraviolet transmittance of 1% or below on the basis of a glass thickness of 3.2 mm; so the dark yellow grey glass composition can meet the demand for privacy protection, has ultra-strong ultraviolet penetration blocking performance and low solar transmittance, can well prevent ultraviolet rays from damaging ornaments and people in a vehicle or in a room, and has good energy-saving and environment-friendly effects.

Description

Technical field: [0001] The invention relates to a float glass composition, especially a gray glass composition, and specifically provides a dark yellow-gray glass composition with an ultraviolet transmittance (Tuv) less than or equal to 1%. Background technique: [0002] Gray glass is a kind of body tinted glass, which has the advantages of heat insulation, UV protection and privacy protection. It is often used as automotive glass, architectural glass and even aviation glass. When using gray glass, in addition to considering its optical properties, such as visible light transmittance, infrared transmittance and ultraviolet transmittance, etc., it is also necessary to consider its color tone and appearance, the composition of the glass itself, the selection of colorants and their proportions, etc. All aspects will affect the optical properties of the glass and the tint of the glass. [0003] Japanese patent JP3669019B2 discloses a kind of dark gray glass, the coloring compo...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN200480007732.8 discloses a neutral gray glass composition with low transmittance color shift characteristics for automotive vision panels, the main colorant is 0.30-0.75% (by weight) of Fe2O3 (total iron), 0- With 15ppm of CoO and 1-15ppm of Se, the glass composition basically does not contain nickel. Based on the glass thickness of 3.9 mm, its visible light transmittance (Lta) is at least 65%, which obviously cannot meet the needs of privacy protection.

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