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Blue nano tungsten oxide may be applied for producing heat insulation agricultural film, which has a certain shielding effect on ultraviolet rays while ensuring high visible light transmittance. Since such heat insulation thin film does not completely block the ultraviolet rays, a part of the ultraviolet rays can still be irradiated to the plants through the film. In other words, this kind of insulation film does not affect the growth of plants, vegetables or flowers in agricultural greenhouses. We all…

Blue tungsten oxide nano powder may be applied for producing thermal absorption agricultural plastic film. The agricultural plastic film obtained has the characteristics of visible light transmittance of 86%~92% and haze less than 0.8%. Also, it is anti-fog. Besides, such film has a thickness of 0.008mm, which meets national mandatory standards. In addition, the transparent agricultural film produced by adding nano grain size blue tungsten oxide powder has a certain anti-ultraviolet ding, so that the ultraviolet rays irradiated through the…

Nano grain size blue tungsten oxide may be applied for preparing thermal absorption agricultural plastic film. The so-called agricultural film is the agricultural plastic film, which refers to a thin agricultural film that directly covers the cultivated alfalfa or the ground, and generally has a thickness of 0.008 to 0.015mm. In recent years, various colored agricultural films have been listed. Due to the different absorption and reflection patterns of different colors of agricultural film, the effects on crop growth and…

Dark blue nano tungsten oxide for heat insulation agricultural film can be prepared by hydrogen reduction using ammonium paratungstate (APT) as a raw material. The process of APT hydrogen reduction to blue tungsten oxide undergoes dehydration, deamination, and phase transformation processes. During this process, a large amount of water vapor and ammonia gas are discharged from the inside of the raw material APT particles. Due to the combined action of gas evolution and phase transition, a large number of cracks…

Blue tungsten oxide nanopowder for transparent thermal insulation window film is critical for deep processing materials. While what is the source of the performance of these deep-processed materials? This can be traced back to the raw material of blue tungsten oxide powder — ammonium paratungstate (APT). In the production of doped tungsten wire, manufacturers often encounter the problem that, using APT produced by different manufacturers or different processes as raw materials, although their chemical composition analysis results are not significantly…

Blue tungsten oxide nano powder for transparent thermal insulation window film can be used to prepare tungsten powder, wherein there are two reduction methods — static reduction method and dynamic reduction method. In static reduction, the powder has a certain layer thickness. The gradient of H2O/H2 concentration from the surface of the powder layer to the inside thereof is gradually increased, and the particle size of the tungsten powder gradually increases from the surface layer to the lower layer. When…

Nano grain size blue tungsten oxide for transparent thermal insulation window film can be used as a raw material for the preparation of tungsten powder, and the reduction method used includes static reduction method and dynamic reduction method, respectively. Therefore, some scholars have studied the thermodynamics and kinetics of industrial scale static reduction of BTO powder and found that at 750°C~1000°C, the hydrogen reduction of blue tungsten oxide has the following transformation phase: WO3→WO2.90→WO2.72→WO2→W. The most volatile WO2(OH)2 compound is…

Nano blue tungsten oxide for transparent thermal insulation window film can be used as a raw material for hydrogen reduction to prepare tungsten powder. And some scholars have studied the relationship between the reduction time and the particle size of tungsten powder. It is found that the particle size of the powder increases with the increasing of reduction time under the conditions: the ratio of H2/WO3-x is 4.0 and the reduction temperature is 800°C and 900°C, respectively. When the ratio…

Blue tungsten oxide powder, which may be used for producing transparent thermal insulation window film, can be hydrogen reduced to prepare tungsten powder by two reduction methods. They are static reduction method and dynamic reduction method, respectively. Thus, the hydrogen reduction of blue tungsten oxide powder to produce tungsten powder has two kinds of reduction furnaces, namely static reduction propulsion reduction furnace and dynamic reduction rotary reduction furnace. According to the data, under the condition of ensuring sufficient reduction, compared…

Blue tungsten oxide powder for transparent thermal insulation window film can be used to prepare tungsten powder by hydrogen reduction method. Provided that other conditions are invariant, the particle size of tungsten powder can be increased if the reduction temperature is increased, or the reduction time is prolonged or the H2/WO3-x ratio is decreased. In addition, the appropriate reduction time should be selected in industrial production to make the reduction sufficient and prevent the furnace charge from flowing backwards. Under…