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Author:

Lai, Chen (Lai, Chen.) | Wang, Jinshu (Wang, Jinshu.) (Scholars:王金淑) | Zhou, Fan (Zhou, Fan.) | Liu, Wei (Liu, Wei.)

Indexed by:

CPCI-S

Abstract:

In this study, tungsten-rhenium (Re-W) dispenser cathodes are fabricated by cold-pressing and sintering of Re-W powder which was prepared by spray drying method followed by two-step hydrogen reduction. Emission performance of the cathodes was tested on a planar diode configuration. The elements distribution of rhenium and tungsten on the surface of 75at% Re-W cathode were also investigated by EPMA. Among the cathodes fabricated in different compositions, the 75at% Re-W cathode demonstrates the highest zero field emission current density of 14.03 A.cm(-2) at 1000 degrees C.

Keyword:

dispenser cathode emission current density two-step reduction W-Re mixed matrix

Author Community:

  • [ 1 ] [Lai, Chen]Beijing Univ Technol, Sch Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Jinshu]Beijing Univ Technol, Sch Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Zhou, Fan]Beijing Univ Technol, Sch Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Liu, Wei]Beijing Univ Technol, Sch Mat Sci & Engn, Beijing 100124, Peoples R China

Reprint Author's Address:

  • 王金淑

    [Wang, Jinshu]Beijing Univ Technol, Sch Mat Sci & Engn, Beijing 100124, Peoples R China

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Source :

2015 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE (IVEC)

Year: 2015

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: 8

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