Scandium doped tungsten powder is Sc2O3 doped tungsten powder, which is prepared by liquid-solid doping. It is used in the preparation of scandium - containing tungsten cathode, which is thermionic emission uniformity, strong ability to resist ion bombardment.
Sc2O3 powder was evenly adhered to the surface and crack of the doped tungsten powder, and Sc2O3 was evenly covered in the tungsten particles, and increased with the tungsten contact surface, increasing the binding force of scandium and tungsten.
Scandium tungsten powder can be used for the preparation of homogeneous and anti-ion bombardment ability of the cathode. Adding Sc2O3 to the emission material of barium tungsten cathode can improve the cathode's electron emission capability.
Scandium - containing tungsten cathode is a kind of ideal large current cathode, which has been widely used. It has lower work ding, a higher level of thermionic emission, in the modern vacuum electronic devices have good development space.
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