Accession Number : AD0664186

Title :   INVESTIGATION OF STRONTIUM TUNGSTATE MIXED CRYSTAL CATHODE.

Descriptive Note : Triannual rept. no. 1, 26 Apr-26 Aug 67,

Corporate Author : ITT INDUSTRIAL LABS FORT WAYNE IND

Personal Author(s) : Byrum,Bernard W. ; Wolfgang,Lozure G. ; Gumnick,J. L.

Report Date : DEC 1967

Pagination or Media Count : 25

Abstract : The purpose of the work described is to investigate the formation and characteristics of strontium-tungstate mixed crystal cathodes. The objective is the realization of a lower work function in a cathode which is relatively rugged compared with conventional oxide cathodes. Richardson plots and retarding field electron beam techniques were used to evaluate the work functions of sample cathodes. All cathodes were made by spraying the mixed materials onto a metallic substrate. Combinations prepared and evaluated were: strontium carbonate (SrCO3) on W, SrCO3 + W on Ta, SrCO3 + W on Ta with an SrCO3 underlayer, SrCO3 + W on Ta with a nickel intermediate, Sr3CO3 + W on Ni, and SrCO3 + W on P-50 nickel alloy. (Author)

Descriptors :   (*CATHODES(ELECTRON TUBES), CERAMIC MATERIALS), (*STRONTIUM COMPOUNDS, CATHODES(ELECTRON TUBES)), (*TUNGSTATES, CATHODES(ELECTRON TUBES)), WORK FUNCTIONS, SUBSTRATES, TUNGSTEN, TANTALUM, NICKEL, NICKEL ALLOYS, CERAMIC COATINGS, ADHESION, NICKEL COMPOUNDS, METAL CARBONYLS, SINTERING, DIODES

Subject Categories : Electrical and Electronic Equipment
      Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE