Scandia doped impregnated cathode prepared by spray drying method - Details

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The　scandia　doped　tungsten　powders　have　been　obtained　by　a　new　method　of　spray　drying　combined　with　two-step　reduction　in　hydrogen　atmosphere.　The　impregnated　cathode　prepared　with　the　obtained　powders　has　an　excellent　emission　capability　of　121　A/cm2　at　950°　b　in　pulsed　condition.　The　DC　life　test　result　indicates　that　the　emission　current　density　of　40　A/cm2　has　lasted　up　to　4000　hours.　©　2015　IEEE.

Keyword：

cathode; emission property; Scandia doping; tungsten

Author Community：

[ 1 ] [Wang, J.]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China
[ 2 ] [Liu, W.]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China
[ 3 ] [Wang, Y.]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China
[ 4 ] [Yang, F.]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China
[ 5 ] [Zhu, X.]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China
[ 6 ] [Liang, W.]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China

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Proceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015

Year： 2015

Language： English

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