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Author:

Yang, Fan (Yang, Fan.) | Wang, Jinshu (Wang, Jinshu.) (Scholars:王金淑) | Liu, Wei (Liu, Wei.) | Wang, Yiman (Wang, Yiman.)

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EI Scopus

Abstract:

A new kind of pressed Y2O3 doped Ba-W dispenser cathodes are prepared by a sol-gel method combined with high temperature sintering in dry hydrogen atmosphere. The results show that the growth of the grains is hampered by the pinning effect of Y2O3 distributing uniformly on the surfaces of tungsten particles, resulting in the formation of small grain size. It is found that Y2O3 improves the secondary electron emission property, i.e., the secondary emission yield increases with the increase of Y2O3 content in the samples. The maximum secondary emission yield δmax of the cathode with 15% amount of Y2O3 can reach 2.92. Furthermore, the cathode shows a certain thermionic emission performance. The zero field emission current density J0 of 4.18A/cm has reached at 1050oCb for this kind of cathode after being activated at 1200oCb, which are much higher than that of rare earth oxide doped molybdenum (REO-Mo) cathode reported in the previous work. © 2012 IEEE.

Keyword:

Sintering Electron sources Rare earths Field emission cathodes Thermionic emission Electrons Field emission displays Magnetrons Cathodes Secondary emission Sol-gels Dispensers Sol-gel process

Author Community:

  • [ 1 ] [Yang, Fan]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China
  • [ 2 ] [Wang, Jinshu]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China
  • [ 3 ] [Liu, Wei]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China
  • [ 4 ] [Wang, Yiman]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China

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Year: 2012

Page: 181-182

Language: English

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 3

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