A low-emissivity coated glass product with high flatness and its preparation method

Abstract

The invention discloses a low-radiation coated glass product with high flatness, which comprises a glass substrate, and a multi-layer sputtering layer is supported on the main surface thereof, and the sputtering layer includes a first dielectric layer, a second A protective layer, a low-emissivity layer, a second protective layer, and a second dielectric layer; wherein, the first and second dielectric layers are TiAl x Mg y o z , x=0.01~0.1, y=0~0.05, 2.015≤z≤2.2; the first and second protective layers are Ni layer or NiCr alloy layer; the low radiation layer is Ag layer or Au layer. The dielectric layer is doped with Al 2 o 3 or Al 2 o 3 and MgO, thereby improving the permeability of the dielectric layer to visible light and improving the transparency of low-emissivity coated glass. The invention also discloses its preparation method. In the preparation method, TiAl or TiAlMg alloy is selected as the target material to sputter the dielectric layer. Al, or Al and Mg contained in the target material can improve the magnetic permeability of the Ti target, thereby improving the sputtering of the dielectric layer. The uniformity of the radiation and the uniformity of the film layer are improved.

Description

technical field [0001] The invention relates to a low-radiation coated glass product with high film flatness and good light transmittance and a preparation method thereof. Background technique [0002] Glass plays an important role in contemporary production and life. Glass is used in various aspects such as building doors and windows and automobile windows. A new favorite of energy-saving and environmental protection in the glass family is low-emissivity coated glass, commonly known as low-emissivity glass or Low-E glass; it is sputtered on the glass surface with a film that can pass through visible light and reflect mid- and far-infrared rays, thereby reducing the glass surface. Emissivity, reduce the heat transfer loss of glass caused by heat radiation, and improve the thermal insulation capacity of glass. [0003] The existing low-emissivity coated glass uses titanium dioxide as the dielectric layer; its disadvantages are that the uniformity of the film layer is poor, t...

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Problems solved by technology

[0003] The existing low-emissivity coated glass uses titanium dioxide as the dielectric layer; its disadvantages are that the uniformity of the film layer is poor, the light transmittance is not high enough, and the flatness is not good. Zinc layer, thus increasing the process and cost of sputtering

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