Energy-saving coated glass and preparation method thereof

Abstract

The invention discloses energy-saving coated glass. Glass is used as a base plate, a vanadium dioxide thermochromic layer and a silicon dioxide aerogel layer sequentially deposit on the glass. Different heat propagation modes of heat conduction and radiant heat blocking are integrated, and the energy-saving coated glass has heat -insulating and thermochromic functions. Oxidization of the vanadium dioxide layer is retarded by introducing the silicon dioxide aerogel layer, and meanwhile a permeability improvement effect can be played. The invention further discloses a preparation method of the energy-saving coated glass. Firstly, the glass base plate is subjected to hydrophilic treatment; the surface of the glass base plate subjected to hydrophilic treatment is coated with a vanadium dioxide precursor layer by adopting a sol-gel method; the surface of the vanadium dioxide precursor layer is coated with a silicon dioxide aerogel precursor layer by adopting a sol-gel method; finally, the energy-saving coated glass is obtained through heat treatment, the heat treatment temperature is 550-580 DEG C, and the time is 1-10 hours.

Description

technical field [0001] The invention relates to the field of glass preparation, in particular to an energy-saving coated glass and a preparation method thereof. Background technique [0002] Building energy consumption accounts for a large proportion of the total energy consumption of society, and the energy lost through doors and windows is the most important part of it. Therefore, energy saving of glass is a hot spot of current research. Due to the optical transparency and high thermal conductivity of architectural glass, the amount of indoor infrared heat radiation energy is determined by it. Therefore, the thermal insulation performance of glass has become an important indicator to measure whether architectural glass is energy-saving. In the cold winter, glass can reduce the loss of mid- and far-infrared heat radiation in the house while getting more direct heat radiation from the sun, so that the room can maintain a more suitable temperature; The far-infrared heat radi...

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Problems solved by technology

Solar control glass and low-emissivity glass are widely used. The existing solar control glass and low-emissivity glass are generally single-layer flat glass, which has the following disadvantages: poor impact resistance, easy to be polluted and scratched during handling and installation, transparent Strong light, high reflectivity, high light pollution, low heat and sound insulation performance, easy to fall off the coating layer and affect the service life, etc.

[0005] The above design can improve the transmittance of visible light and enhance the infrared control ability of sunlight, and obtain a vanadium dioxide-based composite film with adjustable transmittance, but because vanadium dioxide only has selective transmission for energy in the 300-2500nm band , after compounding the above-mentioned transparent film, it still only has good control performance in this band

At the same time, since the thicknesses of the first and second inorganic transparent films are at the nanometer level, they cannot achieve the effect of heat insulation.

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