Spherical densification tungsten powder has the advantages of good quality, high purity and uniform particle size distribution, commonly prepared by plasma method. Porous tungsten matrix prepared with spherical densification tungsten powder, connected with uniform pore structure, can store more barium emission materials.
Applications
Porous tungsten matrix prepared with spherical densification tungsten powder can provide uniform interconnected pore structure, can provide ample storage space for emitting material barium and migration channel, so that it can effectively improve the emission current density, improve the whole performance of cathode components, promote the development of modern microwave vacuum electronic devices.
When using the rules of the spherical densification tungsten powder to suppress and burn into porous tungsten matrix, ball particles not only associated with each other, the gap between and void space is enough, can store more barium emission materials.
Preparation
Plasma spherification technology is to add ordinary tungsten powder to the plasma jet fluid to melt the surface (or whole) of the tungsten powder particles. The droplet is formed by the contraction of the surface tension, and then by rapid cooling, the ball is fixed and the spherical compact tungsten powder is obtained.
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