• DocumentCode
    2924157
  • Title

    Scandia doped impregnated cathode prepared with hollow tungsten spheres

  • Author

    Wang, Jinshu ; Cui, Yuntao ; Liu, Wei ; Wang, Xi ; Wang, Yiman ; Zhou, Meiling

  • Author_Institution
    Coll. of Mater. Sci. & Eng, Beijing Univ. of Technol., Beijing, China
  • fYear
    2012
  • fDate
    24-26 April 2012
  • Firstpage
    43
  • Lastpage
    44
  • Abstract
    The scandia doped tungsten powders have been obtained by a new method of spray drying combined with two-step reduction in hydrogen atmosphere. Based on the powders, the cathode impregnated with 612 aluminates (SDI-612) has excellent emission capability of 72.2A/cm2 at 900oCb, moreover, the SDI-612 cathode has a lower evaporation rate of 8.45*10-9g.cm-2s-1 at 1150oCb.
  • Keywords
    aluminium compounds; cathodes; drying; powders; scandium compounds; spraying; tungsten; Al2O3-Sc2O3:W; SDI-612 cathode; hollow tungsten sphere; powder; scandia doped impregnated cathode preparation; spray drying method; temperature 1150 degC; temperature 900 degC; two-step hydrogen atmosphere reduction; Barium; Calcium; Cathodes; Educational institutions; Powders; Surface treatment; Tungsten; Scandia doping; cathode; emission property; tungsten;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Vacuum Electron Sources Conference (IVESC), 2012 IEEE Ninth International
  • Conference_Location
    Monterey, CA
  • Print_ISBN
    978-1-4673-0368-2
  • Type

    conf

  • DOI
    10.1109/IVESC.2012.6264159
  • Filename
    6264159
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2924157