• DocumentCode
    3179453
  • Title

    High-Current-Density Cathodes Based on Barium Hafnate with Tungsten

  • Author

    Taran, A. ; Plankovskyy, S. ; Ostrovsky, E. ; Ordanjan, S.

  • Author_Institution
    Nat. Aerosp. Univ., Kharkov
  • fYear
    2007
  • fDate
    15-17 May 2007
  • Firstpage
    1
  • Lastpage
    2
  • Abstract
    Method of obtaining hot-pressed composed cathodes based on barium hafnate with tungsten with different percentage of components and experimental results of thermoemission properties investigations of these cathodes are represented. It is shown that cathodes of 63 mass% BaHfO3 + 37 mass% W is most effective one. It allows to obtain the thermoemission current density 230 A/cm2 at 2000 K. Evaporation rate of emission active components for cathode with 37 mass % W at T = 1900 K equals to G = (5plusmn2)-10-6 kg/(m2-s).
  • Keywords
    cathodes; current density; hot pressing; barium hafnate; high-current-density cathodes; hot-pressed composed cathodes; thermoemission properties; Barium; Cathodes; Current density; Electrons; Powders; Pressing; Pulse measurements; Temperature dependence; Temperature distribution; Tungsten; barium hafnate; cathode; electron work function; evaporation rate; poisoning; thermoemission current density; tungsten;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Vacuum Electronics Conference, 2007. IVEC '07. IEEE International
  • Conference_Location
    Kitakyushu
  • Print_ISBN
    1-4244-0633-1
  • Type

    conf

  • DOI
    10.1109/IVELEC.2007.4283309
  • Filename
    4283309
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3179453