Accession Number : ADD003095

Title :   Method for Fabricating an Electron-Emission Cathode.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Thomas,Richard E ; Haas,George A

Report Date : 27 Jul 1976

Pagination or Media Count : 4

Abstract : The patent relates to an improved technique for forming an electron emitting cathode of iridium and similar noble metals. A mixture of powders including a matrix material of one of the noble metals and a pore forming material of silver is shaped into a cathode configuration and sintered at a temperature sufficient to evaporate the silver, thereby producing a porous matrix. The matrix is impregnated with an active material and dried to produce a cathode having increased electron emission characteristics allowing operation at lower temperatures for longer time periods.

Descriptors :   *Cathodes, *Patents, Thermionic emission, Electron emission, Iridium, Osmium, Ruthenium, Silver, Powder metallurgy, Compacting, Sintering, Porosity, Fabrication

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE