Tungsten oxide nanoparticles may be used to prepare a transparent thermal insulation paper, that is, a heat insulation film, and then be applied to a building glass door, glass window or a car window for heat insulation. Besides, nano tungsten oxide can also be used to prepare electrochromic windows, that is, smart windows, which can also play the role of heat insulation and energy conservation.

Tungsten oxide nanoparticles may be applied for preparing a thermal insulation film. The raw material tungsten oxide may be an electrochromic material or a photochromic material, both of which can be used to prepare building thermal insulation film - a transparent film that can freely adjust the passage of ultraviolet and infrared rays in sunlight.

Tungsten oxide nanoparticles may be used to manufacture ceramic microsphere, which may be used to prepare transparent heat insulating films. Due to its advantages of high transparency, high heat insulation, anti-glare and environmental protection, such film has been widely used in the field of building energy conservation. For the raw material nano tungsten oxide particles, experts said that it can be prepared by solvothermal method.

Tungsten oxide nanoparticles may be used to produce a thermal insulation masterbatch, and then be used for preparing a building thermal insulation film or a car heat insulation film. The raw material nano particle size tungsten oxide can be prepared by a solvothermal method. So, what is the formation mechanism of solvothermal preparation of tungsten oxide?

Tungsten oxide nanoparticles may be used to prepare a nano-ceramic color master, which is a heat insulating masterbatch for applying to prepare transparent heat-insulating film, and finally be used in the fields of construction and automobile glass to reduce room temperature, thereby achieve the purpose of energy consumption and environmental protection. Wherein, some experts conducted BET test on nano tungsten oxide raw material. The alcohol solvent is ethanol, the reaction temperature is 180°C, the reaction time is 24h and the molar concentration of the solution is 15mM. They did a BET test of the tungsten oxide nano particles. The BET test result is shown in the following picture, wherein, (a) is the adsorption desorption isotherm curve, (b) is the pore size distribution curve.

Tungsten oxide nanoparticles may be used to produce a nano-ceramic dispersion solution, that is, a heat insulation dispersion solution, and thus be prepared into a thermal insulation film. As an environmentally-friendly building energy-saving material, tungsten oxide film has attracted more and more attention. Therefore, the preparation method of tungsten oxide nanoparticles, such as solvothermal method, has also received much attention from the industry.

Nano tungsten oxide is a near infrared absorption material with high transmittance in the visible region. Also, it has strong plasma absorption in the near-infrared region near the visible region.

Tungsten oxide, mainly referred to as WO3-x, is a near infrared absorption material. Experts say that tungsten oxide nanopowder does not have the absorption of near-infrared light, so it needs to be reduced to WO3–x. So, how to reduce the tungsten oxide nano powder into WO3–x?

WO3 electrochromic film may be used to produce a smart window, in which the tungsten trioxide film is prepared from WO3 nanopowder. Specifically, experts say that the WO3 film can be combined with a counter electrode material such as a V2O5 film to form a smart window with better optical properties, and the reaction formula is:

Amorphous tungsten oxide electrochromic film has electrochromic properties, so it can absorb infrared rays. In other words, such film can absorb heat in sunlight to reduce room temperature. And therefore the heat insulating film is often used in the field of buildings or automobiles. Some experts obtained the amorphous WO3 film by sol-gel electrophoresis, and studied the transmittance of the film with the applied voltage.