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Tungsten trioxide nanopowder applying for thermal insulation paper may be synthesized by hydrothermal method using Na2WO4 and HCl as raw materials. And the influence of different hydrothermal reaction temperatures on the structure, morphology and photochromic properties of tungsten trioxide are analyzed. Influence of Hydrothermal Temperature on Synthesis of Tungsten Trioxide The following figure shows the XRD pattern of WO3 powder prepared at different hydrothermal temperature when the pH value of the reaction system is 1.0. In the figure, e: T=80°C;…

Nano tungsten trioxide for ceramic microsphere may be synthesized by hydrothermal method. If the pH value of the reaction system is 1.0 and 1.5, the synthesized product is tungsten trioxide of hexagonal phase. And if the pH value is 2.0 and 2.5, the synthesized product is tungsten trioxide of cubic phase. According to the analysis, the reason why the synthesized tungsten trioxide is different in phases is that the H+ concentration of the reaction system is different during the adjustment…

Nano tungsten trioxide, which may be applied for producing nano-ceramic color master, may be synthesized by hydrothermal method using sodium tungstate and hydrochloric acid as raw materials. Then, the influence of different pH values on the structure, morphology and photochromic properties of tungsten trioxide are analyzed. Influence of pH Value of Hydrothermal System on Synthesis of Tungsten Trioxide The figure below shows the XRD pattern of WO3 powder prepared at different pH value at 120°C. In the figure, a: pH…

Nano tungsten trioxide is the most used photochromic material currently, which may be applied for preparing nano-ceramic dispersion solution. Thus, this type of ceramic dispersion will have the characteristics of high thermal insulation and excellent weather resistance. Also, it does not interfere with radio communications. The reason why tungsten trioxide has excellent photochromic properties is that tungsten trioxide is a type of semiconductor material, which has symmetrical structure, and therefore it can generate electron hole pair under light excitation. Photochromism…

Nano tungsten trioxide, as a near-infrared shielding material, plays an important role in building energy efficiency. It reduces energy consumption and improves living comfort. The heat insulation material has high visible light transmittance and excellent heat insulation effect, and therefore it has a wide application as bellow: 1. Applied to various kinds of indoor/outdoor windows and doors. 2. Applied to various types of outdoor skylight such as PC board, transparent acrylic, and transparent PET. 3. Applied to large-area glass buildings,…

Nano tungsten trioxide may be applied to heat insulating window glass in the form of transparent thermal insulation coating. Thus, you can save money as it reducing the energy charge by lowering the room temperature in hot summer. An aqueous photochromic material for vehicle thin film comprising different components with the following weight percentage: 25-30% of main photochromic material (tungstic acid, or phosphomolybdic acid, or a mixture of the two materials), 70-75% of auxiliary photochromic material (polyvinyl pyrrolidone) and water.…

Nano tungsten trioxide may be applied in window heat insulation film, thereby reducing building energy consumption caused by ultraviolet rays and near-infrared rays in sunlight, lowering cooling costs, improving human comfort, and extending the service life of furniture. Research progress of tungsten trioxide photochromic materials: Using WC16 and mWO3?nH2O as raw materials, stable sol was prepared by changing the pH value, the ratio of alcohol, water and polyethylene glycol, in accordance with two producing processes. Then, the sol was made…

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,…