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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 8    No. 1    March 1998

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THERMIONIC EMISSION OF Mo-Y2O3 FILAMENT CATHODE
Zuo Tieyong1, 2  Nie Zuoren1, 2  Zhou Meiling1, 2  Zhang Jiuxing2  and Wang Jinshu2

1.Department of Materials Science and Engineering,Central South University of Technology, Changsha 410083, P. R. China;
2.Department of Materials Science and Engineering,BeijingPolytechnic University, Beijing100022, P. R. China

Abstract:A new thermionic electron emission material has been studied. The electron emission properties and microstructure of Y-Mo(Mo-Y2O3) wire with content of 3%~5% Y2O3 have been systematically investigated by means of electron tube emission and electron microscope. The results showed that the Y-Mo material has very good electron emission ability, higher emission efficiency and lower operation temperature than those of Th-W cathode, respectively. In addition, Y-Mo cathode electron tube exhibits more stable emission current than that of La-Mo ones.

 

Key words: Mo Y2O3 cathode thermionic emission

ISSN 1672-7029
CN 43-1423/U

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