As we all know, there are many factors that affect tungsten powder property, but the main factors are nothing more than the production process of the tungsten powder, the properties and characteristics of the raw materials used. At present, many researches are on the reduction process, including reduction temperature, boat pushing speed, loading capacity and method, reduction atmosphere, etc. During the production and research process, researchers have found that the properties of different tungsten oxide raw materials have an effect on the performance of tungsten powder.
Let's take a look at 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 properties of tungsten powder.
(1) The difference in characteristics of different tungsten oxide raw materials directly determines the size and composition of the tungsten powder, its physical properties such as compactability and moldability, the content of impurity elements, and the morphology and structure of the tungsten powder. In actual production, raw materials should be selected according to the requirements of tungsten powder when selecting raw materials, which helps to ensure product quality and achieve good economic benefits.
(2) The oxygen content in the raw material of tungsten oxide is positively correlated with the Fsss of the tungsten powder. The purple tungsten oxide with lower oxygen content should be selected as the raw material for the production of ultrafine tungsten powder, and the yellow 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 rate, 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 a single raw material phase composition and a 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 processed materials such as wires, rods, tubes, plates and products with certain shapes. In addition, tungsten powder mixed with other metal powders can also be made into various tungsten alloys, such as tungsten-molybdenum alloy, tungsten rhenium alloy, tungsten copper alloy and high-density tungsten alloy.
