Study on preparation and thermionic emission of nanometer rare-earth tungsten emission materials - 文章详情页

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EI Scopus

摘要：

The　preparation　of　a　rare-earth　tungsten　thermionic　emission　materials　(La-W),　activated　with　nanoscale　oxide,　and　the　relationship　between　there　surface　composition　and　electron　emission　performance　were　investigated.　The　La-W　materials　surface　was　analyzed　by　means　of　Auger　electron　spectroscopy　(AES)　PHI550.　With　a　standard　parallel-plate　diode　configuration　in　a　high　vacuum　chamber,　electron　emission　was　measured　by　a　computer-control　automatic　electron　performance　surveyor.　Results　show　that　an　excess　La　active　layer　was　formed　at　high　temperature,　which　may　do　good　to　the　electron　emission.

关键词：

Auger electron spectroscopy Computer control Current density Dissolution Electron emission Filtration Lanthanum Microstructure Nanostructured materials Sintering Surface structure Thermionic emission Tungsten compounds

作者机构：

[ 1 ] [Xi, Xiaoli]College of Materials Science and Engineering, Beijing University of Technology, China
[ 2 ] [Nie, Zuoren]College of Materials Science and Engineering, Beijing University of Technology, China
[ 3 ] [Nie, Zuoren]P.O.Box 100 Pingleyuan, Chaoyang District, Beijing 100022, China
[ 4 ] [Guo, Yanqun]College of Materials Science and Engineering, Beijing University of Technology, China
[ 5 ] [Yang, Jiancan]College of Materials Science and Engineering, Beijing University of Technology, China
[ 6 ] [Fu, Xiaotian]College of Materials Science and Engineering, Beijing University of Technology, China
[ 7 ] [Zuo, Tieyong]College of Materials Science and Engineering, Beijing University of Technology, China

通讯作者信息：

电子邮件地址：

zrnie@bjut.edu.cn

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