Blue tungsten oxide nanopowder for transparent thermal insulation film is mostly produced by adopting static reduction method in the current industrial production as the relationship between the process parameters and the particle size of tungsten powder is quite clear. As you may have known, the static reduction is one of the ways divided according to the flow pattern of materials, and the other way is dynamic reduction.
Certainly, the dynamic reduction of rotary reduction furnace is also generally valued as it has a continuous production process. And it does not use boats with high hydrogen utilization rate. Also, this reduction method improves working conditions, reduces product unit consumption. Besides, the furnace charge is freely flipped in the furnace to increase the contact chance between blue tungsten oxide and the hydrogen gas, and the furnace temperature is uniform. However, the process parameters of the dynamically reduced rotary reduction furnace are affected by many factors. In other words, the correspondence between the process parameters and the particle size of tungsten powder is not clear, thus hindering its comprehensive promotion in the industry.
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