The Quality Requirement of Using Blue Tungsten Oxide To Produce Tungsten Powder

Fine tungsten powder is widely used in various fields, but the manufacturing process conditions and material requirements it is very rigorous. Using blue tungsten oxide as raw materials to produce ultrafine tungsten powder also has certain material quality requirements which are including blue tungsten impurity content, particle size and volatiles requirements.
Firstly, blue tungsten impurity content requirement, purity and impurities of blue tungsten oxide will influence the tungsten powder grain size and quality directly. Selecting high-quality blue tungsten is the important factor for producing good performance and fine tungsten powder which is an important part in producing fine tungsten oxide process.
Since impurities can be a carrier of oxygen which will delay the residence time of oxygen in the powder layer, to promote the chemical vapor transport can lead to grow tungsten powder particles. The influence of particle size of blue tungsten oxide is when the fee's size from 7.90um increase to 12.94um, tungsten powder particle size reduced from 1.17um to 0.99um, which shows coarse particles of blue tungsten oxide is more advantageous for the preparation of fine tungsten powder. Finally, blue tungsten oxide volatiles requirements, blue tungsten oxide has different residual volatile matter such as NH3 and H2O which will make hydrogen humidity increases in the furnace and it is bad for the preparation of fine tungsten powder.

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