As we all know, there are many factors that affect the performance of tungsten powder, but the main factors are nothing more than the production process of tungsten powder, the performance and characteristics of the raw materials used, and so on. Generally, more studies are conducted on the effect of reduction process on the properties of tungsten powder, including reduction temperature, speed of boat pushing, amount and method of loading boat, reduction atmosphere, etc.
However, in the process of production and research, researchers have found that the properties of different tungsten oxide raw materials will also have a greater impact on the performance of tungsten powder. Next, let’s understand the influence of tungsten oxide raw materials (yellow tungsten oxide WO3, blue tungsten oxide WO2.98, purple tungsten oxide WO2.72 and tungsten dioxide WO2) on the performance of tungsten powder.
Violet Tungsten Oxide
(1) The difference in characteristics of different tungsten oxide raw materials directly determines the physical properties such as the particle size and particle size composition, compressibility and formability of the tungsten powder, the content of impurity elements, and the morphology and structure of the tungsten powder. In actual production, the selection of raw materials should be based on the requirements for tungsten powder, which will help ensure product quality and achieve good economic benefits. (2) The oxygen content in the tungsten oxide raw material is positively correlated with the Fsss of the tungsten powder. The purple tungsten oxide with low oxygen content should be selected as the raw material for the production of ultrafine tungsten powder, and the yellow color with high oxygen content should be selected for the production of coarser tungsten powder. Tungsten oxide and blue tungsten oxide are used as raw materials.
(3) The tighter the particle structure of the tungsten oxide raw material, the slower the reduction speed, the coarser the tungsten powder produced, and the wider the particle size distribution. To produce tungsten powder with high concentration, it is advisable to choose oxide raw materials with single raw material phase composition, loose internal structure and uniform particles.
(4) For the production of tungsten products and tungsten products with special performance requirements, it is better to choose specially treated tungsten oxide or purple tungsten oxide as raw materials. Pure tungsten powder can be made into wire, rod, tube, plate and other processing materials and products of certain shape. In addition, tungsten powder can be mixed with other metal powders to make various tungsten alloys, such as tungsten-molybdenum alloy, tungsten-rhenium alloy, tungsten-copper alloy and high-density tungsten alloy.
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