Violet tungsten oxide nanopowder is a nano functional material, more specifically,  a transparent heat insulating filler, which may be used to prepare transparent heat-insulating film or transparent heat-insulating coating, and then be applied to architectural glass to obtain transparent heat insulation glass. Experts said that the dispersion stability of nano functional material in coatings has a significant impact on the thermal properties and optical properties of transparent thermal-insulation coatings.

Violet tungsten oxide nanopowder is one of the important raw materials for the preparation of heat-insulation glass coating. Due to its excellent optical properties and environmental protection, this environmentally friendly thermal insulation coating is increasingly used on architectural glass. Therefore, everyone began to pay attention to the use of raw material tungsten oxide in the field of heat insulation. And some of them are also concerned about the preparation of raw material powder - W18O49.

Violet tungsten oxide nanopowder is an important raw material for preparing water-based thermal insulation dispersion, and the obtained dispersion together with aqueous fluorine-containing resin can be used for preparing an environmentally-friendly nano transparent thermal insulation coating. So, why choose a water-based fluororesin instead of any other water-based resin to prepare tungsten oxide heat insulation coating?

Violet tungsten oxide nanopowder may be used to prepare thermal insulation dispersion, and the obtained transparent dispersion is combined with fluorocarbon resin to prepare nano transparent heat insulating glass coating with high transparency, high adhesion, high hardness, excellent water resistance and good alkali resistance, in line with the national standards. The visible light transmittance of the coated glass reaches 75%, and the coating film reduces the temperature of the hot box by 6°C.

Violet tungsten oxide nanoparticles for building glass energy saving coating can be prepared by chemical precipitation method. Specifically, some experts have used a chemical precipitation method to prepare a reduced phase tungsten oxide powder with a crystal phase and a chemical composition of W18O49. The method is divided into two steps:

Violet tungsten oxide nanoparticles for producing new energy efficient glass can be prepared by solvothermal method. Compared with other methods, nano violet tungsten oxide prepared by the solvothermal method has high purity, good uniformity, good dispersibility, good crystal form and controllability, low production cost and simple operation.

Violet tungsten oxide nanoparticles for energy efficient glass can be prepared by a sputtering method, a microemulsion method, a chemical vapor deposition method, a hydrothermal synthesis method, a sol-gel method or a solvothermal method. Also, there are other synthesis methods for producing tungsten oxides.

Violet tungsten oxide nanoparticles for energy efficient building glass can be prepared by hydrothermal method. Some experts have used the hydrothermal method to prepare ultrafine W18O49 nanowires with a diameter of less than 1nm, namely violet tungsten oxide nanowires.

Violet tungsten oxide nanoparticles have unique photochromic properties - absorption of near infrared rays, shielding of ultraviolet rays, and transmission of visible light. Therefore, violet tungsten oxide nano powder has been more and more widely used in the production of transparent heat insulation glass coating for applying to building glass.

Studies have shown that violet tungsten oxide nanoparticles have good near-infrared absorption properties, and the absorption of infrared light of nano violet tungsten oxide can cover the entire near-infrared region, thus it can be used for preparing an environmentally-friendly transparent heat insulation coating.