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Blue tungsten oxide powder, or WO2.92, may be used to produce heat-insulating glass window film and can be applied for the preparation of ultrafine tungsten powder. Some scholars have studied the main four phase transitions in the reduction process of blue tungsten oxide, namely, β-tungsten oxide→γ-tungsten oxide→tungsten dioxide→tungsten powder. The following mainly focuses on the reduction process from tungsten dioxide to tungsten powder. The morphology image of tungsten oxide in this process is as follows, wherein the left shows the…

Blue tungsten oxide powder for heat-insulating glass window film can be used to prepare tungsten powder. Some scholars have studied the main four phase transitions of blue tungsten oxide at the reduction temperature of 770°C~900°C. in other words, they study the processes: β-tungsten oxide → γ-tungsten oxide → tungsten dioxide → tungsten powder. The following mainly discusses the reduction process from γ-tungsten oxide to tungsten dioxide. The morphology image of tungsten oxide in this process is as follows, wherein the…

Blue tungsten oxide not only may be applied to produce heat-insulating glass window film for applying in buildings and automotives, but also can be used for the preparation of tungsten powder. Some researchers have focused on the four major phase transitions of blue tungsten oxide powder during the reduction process when the reduction temperature is 770°C~900°C: β-tungsten oxide (WO2.9) → γ-tungsten oxide (WO2.72) → tungsten dioxide (WO2)→tungsten powder. The following mainly discusses the reduction process from WO2.72 to WO2. From…

Blue nano tungsten oxide may be used to produce heat-insulating glass window film in a hydrogen reduction process. Some scholars have studied the reduction process of blue tungsten oxide to γ-tungsten oxide. It was found that as the blue tungsten oxide is reduced in hydrogen, the oxygen phase of the main phase component β-tungsten oxide in blue tungsten oxide decreases and the vacancy increases. The β-tungsten oxide is transformed into γ-tungsten oxide, and the surface roughness of the γ-tungsten oxide…

Dark blue nano tungsten oxide may be applied for producing heat-insulating glass window film. And such heat insulation film can be used in heat insulation fields for architectural window glass and automotive window glass, such as, office buildings, hotels, exhibition halls, high-rise apartments, villas, houses, sunrooms, and glass curtain walls in shopping malls. Then, do you know what blue tungsten oxide is? Blue tungsten oxide powder is an unclear product industrially. The main phase composition of blue tungsten oxide is…

Blue tungsten oxide nanopowder for thermal insulation thin film is the most widely used raw material for preparing ultrafine tungsten powder. As the reduction process conditions, under the premise of stability of blue tungsten oxide, play a decisive role in the particle size of tungsten powder. Therefore, researchers have studied the effects of reduction temperature, loading capacity and hydrogen flow rate on the particle size of tungsten powder by hydrogen reduction to obtain ultrafine tungsten powder. The effect of loading…

Blue tungsten oxide nano powder for thermal insulation thin film can be used to prepare ultrafine tungsten powder. As the reduction process conditions such as reduction temperature, loading amount and hydrogen flow rate determine the particle size of tungsten powder, some scholars have conducted research on the preparation of ultrafine tungsten powder by analyzing the effects of hydrogen reduction, reduction temperature, amount of loading and flow of hydrogen on the particle size of tungsten powder. The influence of hydrogen flow…

Nano grain size blue tungsten oxide for thermal insulation thin film can be used to prepare tungsten powder of fine particle size. However, in the process of directly preparing fine tungsten powder by hydrogen reduction of blue tungsten oxide, the reduction conditions should be strictly controlled to avoid the generation of violet tungsten (WO2.72). This conclusion can be drawn from the thermodynamic analysis of hydrogen reduction of blue tungsten oxide. Image of ΔG° T in hydrogen reduction of tungsten oxides…

Nano blue tungsten oxide for thermal insulation thin film can be used to produce fine grain size tungsten powder. And it is reported that blue tungsten oxide is the most widely used raw material for preparing tungsten powder. When tungsten powder is prepared by hydrogen reduction method using blue tungsten oxide as a raw material, the change of particle size of tungsten powder is mainly related to the following factors, including reduction temperature, reduction time, loading amount, hydrogen flow rate,…

Blue tungsten oxide powder, also known as WO2.92, may be used to produce thermal insulation thin film and can be applied to prepare ultrafine tungsten powder under appropriate process conditions. As you may have known, tungsten carbide, as an important tool material and structural material, plays a significant role in many fields with the development of science and technology. However, it is a brittle material. And there is a contradiction between its hardness and strength. Conventional WC-based tungsten carbide tool…