RESEARCH ON THE EVAPORATION PROPERTY OF IMPREGNATED DISPENSER CATHODE BY AES

Zhang Yongkang; Zhu Qingyuan; Zhang Yiying

Volume 9 Issue 1

Jan. 1987

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Zhang Yongkang, Zhu Qingyuan, Zhang Yiying. RESEARCH ON THE EVAPORATION PROPERTY OF IMPREGNATED DISPENSER CATHODE BY AES[J]. Journal of Electronics & Information Technology, 1987, 9(1): 42-51.

Citation:

Zhang Yongkang, Zhu Qingyuan, Zhang Yiying. RESEARCH ON THE EVAPORATION PROPERTY OF IMPREGNATED DISPENSER CATHODE BY AES[J]. Journal of Electronics & Information Technology, 1987, 9(1): 42-51.

Zhang Yongkang, Zhu Qingyuan, Zhang Yiying. RESEARCH ON THE EVAPORATION PROPERTY OF IMPREGNATED DISPENSER CATHODE BY AES[J]. Journal of Electronics & Information Technology, 1987, 9(1): 42-51.

Citation:

Zhang Yongkang, Zhu Qingyuan, Zhang Yiying. RESEARCH ON THE EVAPORATION PROPERTY OF IMPREGNATED DISPENSER CATHODE BY AES[J]. Journal of Electronics & Information Technology, 1987, 9(1): 42-51.

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RESEARCH ON THE EVAPORATION PROPERTY OF IMPREGNATED DISPENSER CATHODE BY AES

Received Date: 1985-01-14
Rev Recd Date: 1985-04-19
Publish Date: 1987-01-19

Abstract

Abstract

During the activation and aging, the evaporation components and rates from 4.56:1.44:2 impregnated dispenser cathode have been determined by the vapor-collect method based on AES. (1) the evaporation rate of a cathode after aging differs from that of a just activated cathode by a factor of 5 to 10. The evaporation energy of the former is 4.58 eV, and that of the latter is 4.34 eV. (2) at operating temperatures, the metallic Ba in the evaporated material is about 90%, and the barium oxide is about 9.3%. (3) below 1000℃ the evaporation of Ca is not significant, over 1150℃ the Ca starts evaporating rapidly, particularly in the activation process, it may approach 3.5% at 1250℃.

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References(1)

References

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