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