Preparation and characterization of impregnated Y2O 3-W Matrix Scandate Cathode - 文章详情页

作者：

Yang, Fan (Yang, Fan.) | Wang, Jinshu (Wang, Jinshu.) (学者：王金淑) | Liu, Wei (Liu, Wei.) | Wang, Yiman (Wang, Yiman.) | Zhou, Meiling (Zhou, Meiling.)

收录：

EI Scopus

摘要：

Impregnated　Y2O3　Doped　Tungsten　Matrix　Scandate　Cathode　was　prepared　by　impregnating　Y2O3-W　matrix　with　barium-aluminum-scandate.　The　zero　current　density　J0　of　the　cathode　at　900oCb　has　reached　14.63A/cm2　and　secondary　emission　yield　δ　is　3.51　after　being　optimally　activated,　both　higher　than　the　emission　performances　of　Ba-W　dispenser　cathode.　Auger　electron　spectroscopy　result　indicates　that　Sc,　Ba　and　O　diffuses　from　the　interior　porous　body　to　surface　simultaneously　to　form　a　＇Ba-Sc-O＇　active　substance　layer,　which　lowers　the　work　function　of　the　cathode,　and　the　increase　of　Y　2O3　content　will　contribute　to　the　formation　of　n-type　semiconductor,　which　enhances　the　electric　conductivity　of　the　cathode,　thus　the　emission　performance　of　the　cathode　has　been　improved.　©　2014　IEEE.

关键词：

Auger electron spectroscopy Barium alloys Binary alloys Cathodes Secondary emission Vacuum technology

作者机构：

[ 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
[ 5 ] [Zhou, Meiling]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China

通讯作者信息：

电子邮件地址：

wangjsh@bjut.edu.cn

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