公开(公告)号：US20180254164A1

公开(公告)日：2018-09-06

申请号：US15757343

申请日：2016-12-30

申请人： BEIJING UNIVERSITY OF TECHNOLOGY

发明人： JINSHU WANG ,  LIRAN DONG ,  JIE ZHANG ,  MINGCHUANG TIAN ,  JINGCHAO LIU ,  XIAOYANG CHEN ,  XIAO HAN ,  LIYANG XIAO

IPC分类号： H01J23/05 ,  B22F3/24 ,  C23C8/20 ,  H01J9/04

CPC分类号： H01J23/05 ,  B22F3/24 ,  B22F5/12 ,  B22F2003/241 ,  B22F2301/20 ,  B22F2302/25 ,  B22F2998/10 ,  B22F2999/00 ,  C22C32/0031 ,  C23C8/20 ,  C23C8/80 ,  H01J9/04 ,  H01J9/042 ,  H01J23/04 ,  H05B6/66 ,  H05B2206/04 ,  Y10T29/49002 ,  B22F3/02 ,  B22F3/10 ,  B22F3/17 ,  B22F2201/30

摘要： A carburized La2O3 and Lu2O3 co-doped Mo filament cathode and its fabrication method, which belongs to the technical field of rare earth-refractory metal cathodes. The rare earth oxides are La2O3 and Lu2O3, and the total concentration of rare earth oxides ranges from 2.0-5.0 wt. %. The La2O3 and Lu2O3 co-doped molybdenum oxide powers are prepared by Sol-Gel method. La2O3 and Lu2O3 co-doped Mo powers are prepared by two calcining steps. Then pressing and sintering the mixed powders to obtain the molybdenum rods; operating mechanical and heat processes of the molybdenum rods to obtain molybdenum filament. Operating electrolytic cleaning, straightening, winding modeling and cutting treatments with Mo filament to obtain the un-carburized La2O3 and Lu2O3 co-doped Mo cathode. And then carburize the filament cathode at a high temperature for a short time to obtain a cathode with high carburization degree. And then operate the out-gassing treatment and activation treatment with the cathode at a high temperature to obtain an environmental and non-radioactive cathode with good emission current and emission stability.