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tungsten powder density is an important characteristic for tungsten processing materials and tungsten alloys. It can be influenced by controlling reduction parameters and adjusting the particle size distribution.
Tungsten is a highly rare element found in ores such as scheelite and wolframite. It has an atomic weight of 74 and a specific gravity of 1.10.
Spherical tungsten powder is used as the raw material for making tungsten metal, tungsten processing materials, tungsten alloys and tungsten products. It is also widely used in the production of radiation shielding fillers, weight fillers and induction accelerators.
Typical packing density of fine and coarse tungsten powder is 20-120 g/in3. Density can be increased up to 130 g/in3 with extra processing steps by controlling the reduction parameters and adjusting the particle size distribution.
Controlling the reduction parameters makes it possible to produce powder with any average grain size between 0.1 and 10 um. This can be achieved by introducing nitrogen into the discharge or using a tungsten oxide reductant.
Reduction of tungsten oxides by hydrogen is an excellent method for producing high-quality tungsten powder. It is the most effective way of producing tungsten powder with any size distribution between 1 and 10 um. Its unique characteristics include: (a) a high nucleation rate, which leads to a small grain size; (b) high mobility of the tungsten particles; and (c) a good particle transport by the chemical vapour diffusion process.
Besides, it can improve the sintering process and the performance of various tungsten-based products. It can provide excellent surface finishes and a strong mechanical strength with good ductility, as well as resistance to oxidation.