High-light-transmittance and low-radiation self-cleaning glass

Abstract

The invention discloses self-cleaning glass which has high visible light transmittance and high infrared ray reflectivity. The self-cleaning glass is provided with a cladding layer prepared by a magnetron sputtering processes on one side, and the cladding layer structurally comprises a medium layer 1, a medium layer 2, a medium layer 3 and a glass substrate layer, wherein the medium layer 1 adopts a rare earth element-containing titanium oxide layer with the thickness of 15-200nm, the medium layer 2 adopts a titanium oxide/silicon oxide blend layer with the thickness of 10-150nm, and the medium layer 3 adopts a metal oxide or metal fluoride layer with the thickness of 5-350nm. By the magnetron sputtering processes, the whole production process of the self-cleaning glass is safe, environment-friendly and free of pollution to the environment; by adopting a structural design of a glass film layer, the surface water contact angle is less than 2 degrees, and in a visible light waveband, the light transmittance is 2% higher and the visible light reflectivity is 5% lower than those of cladding-layer-free glass with the same specification respectively; the self-cleaning glass has the infrared reflectivity of 70%; through a design of a film system of the cladding layer, the self-cleaning glass provided by the invention overcomes contradictions of the conventional titanium-oxide-coating self-cleaning glass in aspects of high light transmittance and low radiation, and can be widely used as a high-end building material and photovoltaic glass.

Description

technical field [0001] The invention relates to a self-cleaning glass with high light transmittance and low radiation, which is one of the key materials for high-end building decoration and photovoltaic module panels, and belongs to new building materials and photovoltaic technology. Background technique [0002] Since the first discovery of the photocatalytic degradation of organic matter by titanium oxide in 1969, self-cleaning glass coated with titanium oxide has been extensively researched and developed. At present, there are hundreds of self-cleaning glasses being studied or applied, which can be divided into three categories in terms of production methods: magnetron sputtering, electron beam evaporation, and sol-gel methods; product functions It has also developed from the original single self-cleaning surface to multiple composite functions, such as low-radiation self-cleaning type, high antibacterial type, anti-reflection self-cleaning type and so on. [0003] Compa...

AI Technical Summary

Problems solved by technology

Used in the construction field, it will lead to a decrease in transparency; used in the photovoltaic field, it will reduce the photoelectric conversion efficiency of the module

The newly-appeared anti-reflection self-cleaning glass improves the light transmittance while retaining the self-cleaning function, but generally has a high infrared transmittance, which is not enough for energy saving and environmental protection in the construction field.

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