Title :
Emission property of RE2O3 doped Mo cathode materials
Author :
Wang, Jinshu ; Liu, Wei ; Gao, Fei ; Wang, Yiman ; Zhou, Meiling
Author_Institution :
Beijing Univ. of Technol., Beijing
Abstract :
Single La2O3, Ce2O3 doped Mo with low content of RE2O3 has good thermionic emission property. The zero-field emission current densities at 1450 degC of 6.87A/cm and 5.03 A/cm2 could be obtained for La2O3(4wt%)-Mo and Ce203(4wt%)-Mo, respectively.La2O3-Mo, Ce2O3-Mo cermet cathode containing high content of RE2O3 shows a certain secondary emission property. A layer of RE2O3 could be formed at surface of the cathode and plays an important role in the emission.
Keywords :
cerium compounds; lanthanum compounds; molybdenum compounds; oxygen compounds; thermionic cathodes; thermionic emission; Ce2O3-Mo; La2O3-Mo; cathode materials; temperature 1450 C; thermionic cathode; thermionic emission property; zero-field emission current densities; Atmosphere; Cathodes; Ceramics; Chemicals; Current density; Electron emission; Magnetic materials; Materials science and technology; Powders; Thermionic emission;
Conference_Titel :
Vacuum Electronics Conference, 2007. IVEC '07. IEEE International
Conference_Location :
Kitakyushu
Print_ISBN :
1-4244-0633-1
DOI :
10.1109/IVELEC.2007.4283307
