Doped tungsten powder is initial materials made of tungsten products, is tungsten powder doped with a certain amount of K, Si, Al oxide, tungsten powder adding rare earth element can obtain high temperature and room temperature properties are excellent doped tungsten products, used in the production of tungsten bars, tungsten bars, tungsten molybdenum alloy, tungsten alloy, etc.
Rare earth elements promote the increase of potassium content in tungsten powder. The addition of rare earth elements can make tungsten oxide reduction more thorough and obtain higher purity of tungsten powder.
In the reduction process of doped tungsten powder, rare earth elements not only makes tungsten powder particles on the surface of the potassium more volatile, and makes more potassium to the interior of the tungsten powder particles, increase effective potassium content, thus improving the sag resistance of tungsten wire.
In the reduction process of doped tungsten powder, the rare earth elements can reduce the water vapor produced by reaction by reducing the reduction rate, and the particle size of tungsten powder becomes small. With the addition of rare earth elements, the energy of some grains of the doped tungsten powder is reduced, and the shape of the grains is changed from the quasi-spherical shape to the regular cubic shape.
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