Method of Making a Long Life High Current Density Cathode from Tungsten and Iridium Powders Using a Mixture of Barium Peroxide and a Coated Emitter as the Impregnant.
Patent Application, Filed 20 Nov 89,
DEPARTMENT OF THE ARMY WASHINGTON DC
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A long life high current density cathode is made from a mixture of tungsten and iridium powders by processing the mixture of powders with an activator into a porus billet, and then impregnating the billet with a mixture of barium peroxide and a coated emitter by firing the billet in a dry hydrogen furnace at a temperature at which the impregnant melts. Patent applications Powder metallurgy Powder metals particle size Coatings. edc
- Fabrication Metallurgy
- Electrical and Electronic Equipment