Study on the emission properties of Re-W thermionic dispenser cathode - Details

Author：

Lai, C. (Lai, C..) | Wang, J. (Wang, J..) | Zhou, F. (Zhou, F..) | Liu, W. (Liu, W..) Unfold

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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　°C.　©　2015　IEEE.

Keyword：

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

Author Community：

[ 1 ] [Lai, C.]School of Materials Science and Engineering, Beijing University of Technology, Chaoyang District, Beijing, 100124, China
[ 2 ] [Wang, J.]School of Materials Science and Engineering, Beijing University of Technology, Chaoyang District, Beijing, 100124, China
[ 3 ] [Zhou, F.]School of Materials Science and Engineering, Beijing University of Technology, Chaoyang District, Beijing, 100124, China
[ 4 ] [Liu, W.]School of Materials Science and Engineering, Beijing University of Technology, Chaoyang District, Beijing, 100124, China

Reprint Author's Address：

[Wang, J.]School of Materials Science and Engineering, Beijing University of TechnologyChina

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Source ：

Proceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015

Year： 2015

Language： English

Cited Count：

WoS CC Cited Count： 0

SCOPUS Cited Count： 3

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Chinese Cited Count：

30 Days PV： 2

Affiliated Colleges：

材料与制造学部材料科学与工程学院

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