Impregnant Composition in Dispenser Cathodes.

Abstract

The compositions of impregnants inside B-type dispenser cathodes containing barium calcium aluminates were examined by means of quantitative microprobe analysis. The impregnant inside the porous tungsten structure was supported with plastic in order to prevent damage when the cathode was sectioned. The impregnant compositions were found to be consistently deficient in CaO when compared to the nominal composition. Variations and reproducibility in composition are discussed. Keywords include: Cathodes; Dispenser cathodes; Electron microprobe analysis; Impregnated cathodes; Thermionic emitters; and Traveling-wave tubes.

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Document Details

Document Type
Technical Report
Publication Date
Aug 12, 1985
Accession Number
ADA160044

Entities

People

  • H. K. A. Kan
  • R. R. Seaver

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Air Force
  • Chemical Synthesis
  • Chemistry
  • Communication Systems
  • Corporations
  • Dermatologic Agents
  • Dispensers
  • Electron Microscopy
  • Elements
  • Impregnation
  • Materials
  • Measurement
  • Microprobes
  • Phase Diagrams
  • Physics Laboratories
  • Reproducibility
  • Thermodynamic Properties

Readers

  • Electronics Engineering
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Microelectronics