Title :
Fabrication and emission property of LaC2-Mo cathode
Author :
Jinshu Wang ; Wei Liu ; Changcai Li ; Liran Dong ; Meiling Zhou ; Tieyong Zuo
Author_Institution :
Coll. of Mater. Sci. & Eng., Beijing Univ. of Technol., Beijing, China
Abstract :
A new kind of cathode, LaC2-Mo cathode was prepared through spark plasma sintering method by using the mixed powder of LaC2 which was prepared by vacuum melting method and molybdenum. It was found that the emission properties of LaC2-Mo cathode increases with the LaC2 content increasing. The emission current density of LaC2-Mo cathode which contains 3.5wt.% LaC2 could reach 0.90A/cm2 at 1400.b whereas that of LaC2-Mo cathode with 10wt.% LaC2 could reach 3.02A/cm2 at 1400.b. Richardson Work function of LaC2-Mo with LaC2 3.5wt% is 2.53eV.
Keywords :
cathodes; emission; melting; sintering; work function; LaC2-Mo; Richardson work function; cathode; emission property; fabrication; spark plasma sintering method; vacuum melting method; Cathodes; Lanthanum; Plasma temperature; Powders; Temperature; Temperature measurement; Thermionic emission; LaC2; Mo; cathode; emission property;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2013 IEEE 14th International
Conference_Location :
Paris
Print_ISBN :
978-1-4673-5976-4
DOI :
10.1109/IVEC.2013.6571138
