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emission current and the lifetime exceeds 3000 h when the cathode′s carbonized ratio is 19.7% operated at 1773 K. Key words:Mo-La2O3 cathode; electron emission stability; carbonizing; lifetime; rare...Thermionic Electron Emission Stability of Mo-La2O3 Cathode 周美玲1,张久兴1,万小峰1,左铁镛1,刘燕琴1,周文元1 (1.The key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University......
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