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Nano grain size tungsten trioxide may be used to prepare nano-ceramic dispersion solution so that the dispersion solution may have the advantages of high heat insulation, high solid content and low viscosity. And it can also reduce the use of the solvent as much as possible. Generally, the dispersion solution should be used in combination with various solvents, resins and auxiliaries. What should be noted is that the compatibility of those materials should be confirmed before use. Electrochromic property is…

Nano grain size tungsten trioxide may be used for the preparation of near-infrared shielding material, which mainly reflects its photochromic property. While tungsten trioxide also has electrochromic property. For example, a uniform and dense nano-Ag film may be prepared by vacuum coating, and then a layer of tungsten trioxide may be deposited thereon by electrochemical method to prepare a nano-Ag/WO3 composite film. The ultraviolet-visible absorption spectrum of the composite film when different voltages are applied in the electrolyte solution shows…

Nano grain size tungsten trioxide may have an application in heat insulating window glass, which make the glass have the following characteristics: 1. High heat insulation: the shielding rate of infrared rays is from 60% to 99%, which varies with the addition ratio of WO3. 2. High light transmittance: visible light transmittance is at the range of70-80%. According to the industry standard (GB/T 31849-2015), the light transmittance of front window of automotives is higher than 70%. 3. Weather resistance: color…

Nano grain size tungsten trioxide may be applied for window heat insulation film with electrochromic property. Electrochromism refers to the phenomenon that the color or transmittance of a material changes reversibly under the action of a certain electric field or voltage. This type of heat-insulating glass not only has the ding of beautifying the building, but also reduces the indoor temperature, thereby reducing the use of air conditioners in hot summer and the occurrence of air conditioning diseases. In addition,…

Nano grain size tungsten trioxide for heat insulation masterbatch has photochromic property so that it may be applied to thermal insulation coatings or thermal insulation films. And finally it may be applied to architectural glass such as glass curtain wall, glass window, glass door, glass skylight, and glass sun room, etc. Also, it may be applied in many other places where high heat insulation and high transparency are required. It not only improves the comfort of human body, but also…

Nano grain size tungsten trioxide may be used in thermal insulating glass. And nano tungsten trioxide with good dispersibility may be prepared by hydrothermal synthesis method using sodium tungstate as a tungsten source and formaldehyde as an organic inducer. In this process, the pH value is adjusted with hydrochloric acid (HCl). Under the irradiation of 3W UV lamp, the color difference of formaldehyde-induced tungsten trioxide nanopowder was 20, while the color difference of tungsten trioxide powder without formaldehyde inducer was…

Nano grain size tungsten trioxide may be used in the preparation of heat insulation coating so that it may be applied in different places where high heat insulation and high transmittance of visible light are required. It is the photochromic property of WO3 that make it can be applied in the field of heat insulation. In recent years, powder and film are the main research directions of photochromic property of tungsten trioxide. Adopting hydrothermal synthesis method and using sodium tungstate…

Nano grain size tungsten trioxide may be used to manufacture thermal insulation coating, and therefore be applied in thermal insulation glass, such as building glass and car window glass. The glass will turn blue when sun shines on such glass. The reason why tungsten trioxide turns blue is the result of the transition of electrons in the W(V) valence band to the W(VII) conduction band. The double charge injection/extraction model, which was proposed in 1975, is the widely accepted model…

Nano grain size tungsten trioxide for thermal insulation film may be prepared by many different preparation methods. What are their advantages and disadvantages? Tungsten trioxide with special morphology can be prepared using different preparation methods such as hydrothermal synthesis method, precipitation method, sol-gel method, microemulsion method, gas-liquid reaction method and template method. The advantages and disadvantages of these preparation methods are as follows: The WO3 powder prepared by hydrothermal synthesis method has the advantages of complete grain development, small particle…