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Nano tungsten trioxide has photochromic effect so that it may be applied for manufacturing heat insulation masterbatch with the characteristics of high thermal insulation, high visible light transmittance, and weather resistance. And therefore, this type of heat insulation material has an ultraviolet shielding rate of 99% and an infrared shielding rate (760-2500nm) of 99%. Speaking of photochromism, what you may have known is the two leap developments in photochromism. Two leap developments in photochromism: In the sixty to seventy years…

Nano tungsten trioxide has photochromic properties so that it may be applied for producing thermal insulating glass, which plays a role of heat insulation. And therefore, it saves cooling fee, prevents furniture from fading, and protects people from sunburn. When it comes to photochromism, what you may have known is the early appearance of photochromic materials. The appearance of those photochromic materials: In 1867, it was first discovered that yellow tetracene compounds faded under the influence of air and light,…

Nano tungsten trioxide for heat insulation coating can be synthesized under hydrothermal conditions using sodium tungstate and hydrochloric acid as the main reaction raw materials. The effects of different pH values and reaction temperatures on the structure, morphology and photochromic properties of tungsten trioxide were found to be: 1. If the pH value is 1.0-1.5 and the temperature is 80-140°C, the product is hexagonal tungsten trioxide. And the powder particles are short-spiral spheres with uniform particle size distribution. 2. If…

Nano tungsten trioxide may be applied as the material for thermal insulation coating, and therefore it can be used for architectural glass (such as skylight, glass curtain walls, glass window, etc.) and automobile glass. This kind of thermal insulation coating has the following advantages: 1. Not easy to fade with long-lasting color; 2. With weather resistance, high temperature resistance, high heat insulation, high UV resistance, anti-UV up to 99%, can prevent furniture from fading and protect people from skin tanning;…

Nano tungsten trioxide may be applied for manufacturing thermal insulation film. And the photochromic properties of WO3 can be measured using UV-vis spectrometer (BaSO4 as baseline correction) and automatic color difference meter. First, put WO3 into the dark box type ultraviolet analyzer, and the color difference value of the sample was tested at room temperature for a period of time after the light was irradiated. Then, the sample was subjected to the reflection experiment using fully automatic colorimeter, and the…

Nano tungsten trioxide may be used to produce thermal insulation paper and other different thermal insulation materials, which means that WO3 will develop with the development of heat-insulating materials. Therefore, it is necessary to study the influence of organic inducers on the structure, morphology, and properties of WO3. Organic Induced Synthesis of Nano Tungsten Trioxide After determining the basic preparation process of tungsten trioxide powder, using sodium tungstate as tungsten source and acidifying with hydrochloric acid (HCl). The organic inducer…

Tungsten trioxide powder may be applied to manufacture ceramic microsphere. Thus, these ceramic microspheres have ultra-dispersion in a variety of ceramic systems, thereby greatly improving the weather resistance of the color of the product. And it also has the characteristics of high temperature resistance, acid resistance, alkali resistance, long service life and other characteristics. Study on the Preparation Process of Tungsten Trioxide Powder Use a certain concentration of sodium tungstate as tungsten source, adjust the pH value of the solution…

Tungsten trioxide powder, which may be applied for manufacturing nano-ceramic color master, can be characterized by XRD, SEM and TEM, etc. And the photochromic properties of the synthesized WO3 can be measured by UV-Vis and color difference meter. The hydrothermal method was used to prepare WO3. The effects of different pH values and different reaction temperatures on the structure, morphology and photochromic properties of WO3 were analyzed to determine the basic preparation process of tungsten trioxide photochromic powder. And the…

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…