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 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 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 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.