Effect of Tungsten Powder Granularity on W-Cu Electrode III

Take tungsten copper W-30Cu as an example, it has more Cu than W-20Cu so that it has better conductivity. With the increasing granularity of tungsten powder, the electric resistance is decreasing and the conductivity is enhancing. On the contrary, the smaller tungsten powder, the greater electric resistance. Except tungsten powder granularity, there are many factors affect the conductivity of tungsten copper electrode, such as chemical composition, porosity, impurities, micro-structure (grain size, grain boundary strength, the distribution of high thermal conductivity of copper phase and W-W connectivity) and so on.

Compared with other factors, tungsten copper granularity has an effect on the conductivity by the porosity and micro-structure of tungsten copper electrode. On the one hand, tungsten copper electrode still has some pores, which can not be neglected. On the other hand, the smaller size of tungsten powder will reduce the completeness of Cu grid, which causes the insufficiency of copper solution.













 

More information about the effect of tungsten powder granularity on W-Cu electrode, click here:

http://news.chinatungsten.com/en/tungsten-information/79564-ti-10150 
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