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Tungsten trioxide powder has photochromic properties so that it may be applied for producing nano-ceramic dispersion solution. However, there have been few reports on the photochromic properties of tungsten trioxide. In such studies, the requirements for photochromic excitation light sources are demanding. For example, currently, it is reported that the best requirement for the excitation light source of tungsten trioxide photochromic powder is 350W high-pressure mercury lamp, which greatly limits its practical application. Therefore, there are two problems in the…

Tungsten trioxide powder, as a near-infrared shielding material, may be prepared by organic induction synthesis method. Regarding the synthesis of tungsten trioxide by this method, it is reported that tungsten trioxide with sharp-edged nanoscale bulk crystal may be synthesized from 4,4/-bipiyridine and multiple metal oxides. While the related research has not been deepened. However, the microstructure and morphology of WO3 have a significant effect on its photochromic properties. Therefore, organic methods are used to provide a new way for the…

Tungsten trioxide powder for heat insulating window glass may be prepared by micro-emulsion method. This type of window glass is popular in home decoration, office, exhibition hall and the like. The micro-emulsion method is a new method for preparing micro-sol, which is developed in recent years, and it is often composed of surfactant, cosurfactant, solvent, and water (or an aqueous solution). In this system, two immiscible continuous media are divided into tiny space by a surfactant amphiphilic molecule to form…

Tungsten trioxide powder may be applied for producing window heat insulation film. Tungsten trioxide powder may be prepared by micro-emulsion method. The preparation method has the advantages of no need of heating, simple experimental device, convenient operation, controllable product composition and particle size, and the like. However, it has the disadvantages of high costs and slight agglomeration. Preparation of Tungsten Trioxide by Micro-emulsion Method N-butyl alcohol, CTAB and cyclohexane were mixed and stirred. Na2WO4 aqueous solution was added and stirred…

Tungsten trioxide powder may be used to manufacture heat insulation masterbatch. And the prepared heat-insulating masterbatch can be used for the preparation of heat-insulating glass and the like. So, the room temperature and temperature in automobile can be reduced. And it also reduces the cooling fee. The WO3 powder may be prepared by template method with the advantages of simple production process, high repetition rate, good predictability, uniform product morphology and stable performance. However, the disadvantage is that the templating…

Tungsten trioxide powder may be applied for producing thermal insulating glass. And this type of glass can be seen in many places such as offices, home, exhibition hall, and so on. WO3 may be prepared by template method. For example, the Na2WO4 solution is inlet with nitrogen, stirred, and added with HCl, and then the washed precipitate is dissolved with oxalic acid solution to obtain tungsten trioxide sol. The AAO template is immersed in it for a period of time,…

Tungsten trioxide powder has the advantages of uniform distribution and good dispersibility, which may be used for producing heat insulation coating, thereby applying to heat-insulating glass. WO3 plays a role of high heat insulation and high visible light transmission in thermal insulation glass. And it is not easy to fade. Also, it will not affect wireless communication. Furthermore, its resistance to UV is up to 99% so that it can prevent furniture from fading and protect people from skin tanning.…

Tungsten trioxide powder may be prepared by hydrothermal method with the advantages of complete particles, small particle size, uniform distribution, and good dispersibility, and may be used to produce thermal insulation coating. The tungsten trioxide powder prepared by the hydrothermal method can directly synthesize the metal or its precursor, avoiding the process of converting to oxide by calcining in the general liquid phase synthesis method, thereby greatly reducing or even avoiding the formation of hard agglomeration. And it can effectively…

Tungsten trioxide powder applying for thermal insulation film may be prepared by hydrothermal synthesis method. For example, the Na2WO4 solution is acidified with HCl and hydrothermally reacted at 130~200°C for 1~5 days. Eventually, tungsten trioxide with uniform particle size distribution can be obtained. The obtained tungsten trioxide can be used for the preparation of a variety of heat-insulating materials, such as film, coating, and so on, thereby being applied to heat-insulating glasses and the like. What is hydrothermal synthesis? Hydrothermal…

Thermal insulation paper prepared by using tungsten trioxide powder as raw material has the advantages of high temperature resistance, high heat insulation, good electrical insulation, fire prevention, nice mechanical processing performance, high strength, excellent tear resistance, high flexibility, and low slag ball content, etc. The tungsten trioxide can be prepared by sol-gel method. Tungsten Trioxide Powder Prepared by Sol-gel Method Na2WO4 was used as raw material, hydrochloric acid was added to make a sol, and then cetrimonium bromide (CTAB) surfactant…