Scandia doped tungsten matrix for impregnated cathode  

作　　者：WANG Jinshu WANG Yanchun LIU Wei LI Hongyi ZHOU Meiling 

机构地区：[1]School of Materials Science and Engineering, Beifing University of Technology, Beijing 100022, China

出　　处：《Rare Metals》2008年第1期9-12,共4页稀有金属（英文版）

基　　金：supported by the Program for New Century Excellent Talents in Universities,the National High Technology Research and Development Program of China(No.2006AA03Z524);the National Natural Science Foundation of China(No.50571001).

摘　　要：As a matrix for Sc-type impregnated cathode,scandia doped tungsten with a uniform distribution of Sc2O3 was obtained by powder metallurgy combined with the liquid-solid doping method.The microstructure and composition of the powder and the anti-ion bombardment behavior of scandium in the matrix were studied by means of SEM,EDS,XRD,and in-situ AES methods.Tungsten powder covered with scandium oxide,an ideal scandium oxide-doped tungsten powder for the preparation of Sc-type impregnated cathode,was obtained using the liquid-solid doping method.Compared with the matrix prepared with the mechanically mixed powder of tungsten and scandium oxide,Sc2O3-W matrix prepared with this kind of powder had smaller grain size and uniform distribution of scandium.Sc on the surface of Sc2O3 doped tungsten matrix had good high temperature stability and good anti-ion bombardment capability.

关 键 词：scandia TUNGSTEN impregnated cathode DOPING 

分 类 号：TQ133.21[化学工程—无机化工]