• DocumentCode
    1092786
  • Title

    Investigation of Sc2O3mixed-matrix Ba—Ca aluminate-impregnated cathodes

  • Author

    Taguchi, Sadanori ; Aida, Toshiylki ; Yamamoto, Shigehiko

  • Author_Institution
    Hitachi, Ltd., Tokyo, Japan
  • Volume
    31
  • Issue
    7
  • fYear
    1984
  • fDate
    7/1/1984 12:00:00 AM
  • Firstpage
    900
  • Lastpage
    903
  • Abstract
    The Sc2O3mixed-matrix Ba-Ca aluminate-impregated cathodes are fabricated and electron emission property as well as Ba evaporation rate is evaluated. The saturation current density Js= 10 A/cm2can be obtained at 840°C of brightness temperature for Sc2O3content of 1-13 wt %. Emission anomaly is observed at low applied electric field strength, which is caused by the effective electric field reduction due to patch field. From surface analysis by Auger electron spectroscopy, the patch field is found to be due to imhomogeneous distribution of a surface layer composed of Ba, Sc, and O.
  • Keywords
    Anodes; Cathodes; Current density; Current measurement; Electron emission; Electron tubes; Fabrication; Pulse measurements; Temperature measurement; Voltage;
  • fLanguage
    English
  • Journal_Title
    Electron Devices, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9383
  • Type

    jour

  • DOI
    10.1109/T-ED.1984.21628
  • Filename
    1483913
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1092786