Thermionic Emission of a Novel Y2Hf2O7 Ceramic Cathode Applied in High-Power Magnetron Tubes

被引：0
|
作者：
Qi, Shikai [1 ]
Wang, Xiaoxia [2 ]
Wang, Xingqi [2 ]
Hu, Mingwei [3 ]
Zeng, Wei [1 ]
Liu, Li [1 ]
机构：
[1] Jiujiang Univ, Inst Elect Engn, Jiujiang 332005, Peoples R China
[2] Chinese Acad Sci, Inst Elect, Key Lab High Power Microwave Sources & Technol, Beijing 100190, Peoples R China
[3] Xidian Univ, Sch Phys & Optoelect Engn, Xian 710071, Peoples R China
来源：
2020 IEEE 21ST INTERNATIONAL CONFERENCE ON VACUUM ELECTRONICS (IVEC 2020) | 2020年
关键词：
Magnetron; cathode; thermionic emission; lifetime; Y2Hf2O7;
D O I：
10.1109/IVEC45766.2020.9520552
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In order to enhance output power and prolong lifetime of the high power magnetron tubes, a novel Y2Hf2O7 Ceramic cathode had been developed. The thermionic emission and lifetime characteristics of the Y2Hf2O7 cathode had been measured. The results show that the cathode can provide 0.15A/cm(2) , 3.5A/cm(2) current density for the space charge limitation at 1300 degrees Cbr, 1600 degrees C br respectively under 300V anode voltage. The lifetime of the cathode is more than 4100 h with an initial load of 0.5A/cm(2) at 1400 degrees Cbr.
引用
收藏
页码：367 / 368
页数：2
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