Violet tungsten oxide nanoparticles may be used to produce a transparent heat insulation coating for applying to glass curtain wall, which is environmentally friendly with long using life. And the common glasses applying with such coating are energy saving glasses. For the raw material, the experts said that nano violet tungsten oxide is a type of tungsten oxides, and is also a semiconductor material. It is blue violet in color. Experts observed the transmission and absorption spectra of the colloid of tungsten oxide nano powder before and after reduction and found that:

Violet tungsten oxide nanoparticles may be applied for manufacturing heat-insulating energy-saving film. Nano violet tungsten oxide is a kind of thermal insulation medium, and the prepared smart film is environmentally friendly for applying in automobile front windshield, building curtain wall glass, architectural glass doors and windows. So, the common glasses become energy-saving glasses. And these glasses are anti-UV, anti-glare, anti-fog, water-proof, fire-proof and scratch-resistant with long service life.

Violet tungsten oxide nanoparticles may be applied for producing transparent heat insulation glass. Then, what is violet tungsten oxide nanopowder? Nano violet tungsten oxide is a semiconductor material, which is capable of absorbing light of a specific wavelength. After performing a certain reduction treatment, the violet tungsten oxide can accumulate a large amount of free electrons on its surface, thereby making it have the characteristics of plasmon resonance absorption of near-infrared light to play an effective role in shielding heat radiation.

Violet tungsten oxide nanoparticles, or W18O49, may be used for producing heat-insulation glass coating. The popular heat insulating media- nano violet tungsten oxide is the only known non-stoichiometric tungsten oxide which exists in pure form with unique photochromic property, gaschromic property, photocatalysis and other properties.

Violet tungsten oxide nanoparticles for nano transparent thermal insulation coating can be synthesized in one step by a solution method with a short reaction time and a low reaction initiation temperature. Moreover, since a large amount of gas is generated during the reaction, the sufficient contact with the air is hindered, so the product of violet tungsten oxide phase is relatively simple to provide favorable conditions for the subsequent utilization of the powder.

Violet tungsten oxide nanoparticles may be used for preparing nano transparent heat insulating glass coating. And the violet tungsten oxide nanopowder is a tungsten oxide phase other than the blue tungsten oxide nanopowder and the yellow tungsten oxide nanopowder.

Transparent heat insulation glass coating of tungsten oxide nanoparticles is an environmentally friendly heat insulation glass coating of high safety. So, such energy saving coating does not contain toxic and harmful substances such as benzene and aldehyde after curing.

Transparent heat insulation coating of WO3 nanoparticles has good resistance to heat radiation (anti-infrared performance) with high anti-ultraviolet performance. So, such energy saving coating can be applied to architectural glass and other fields through spraying and other coating processes, which solves the disadvantages of traditional thermal insulation coatings with large haze and limited additive amount.

Tungsten oxide nanoparticles for an environmentally-friendly transparent heat insulation coating can be prepared by chemical precipitation method. Specifically, the preparation steps are as follows:

Tungsten trioxide nanoparticles are an important thermal insulation material for the preparation of transparent heat insulation coating. The prepared coating is a new type of environmentally-friendly building glass coating, which is prepared by adding tungsten oxide aqueous nano dispersion with high transparency and semiconductor properties to the resin or other material systems.