Study on Sc-Type Cathodes Doped Tungsten

Abstract:

Scandium oxide bodies doped tungsten have been made by both mechanical mixing scandium oxide with tungsten powder and scandate aqueous solution doping tungsten oxide. The distribution of scandium in the bodies and the anti-ion bombarding property of the Sc-type cathode have been studied by SEM and In Situ AES. For bodies made by aqueous solution- solid doping method, Sc2O3 distributed uniformly in the body. This structure is beneficial for diffusion and supplement of scandate to the suface. In Situ AES ion bombarding experimental results show that this kind of body has better anti-ionbombing property at high temperature.