Accession Number:

ADD009310

Title:

Improved Method of Making a High Current Density Cathode.

Descriptive Note:

Patent Application,

Corporate Author:

DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s):

Report Date:

1982-03-19

Pagination or Media Count:

6.0

Abstract:

A high current density cathode is made by first forming an active porous high purity tungsten pellet by the steps of a mixing tungsten powder with about 1 to 5 percent by weight of the mixture of an activator powder and compacting the powders at a pressure of about 35 tons per square inch to form a pellet, B sintering the pellet in a non-oxidizing atmosphere at about 1800 degrees C for about 1 12 to 3 12 hours to the desired porosity, C filling the porous pellet with a filler material, d machining to the desired size and shape, E removing the filler material, and then forming the cathode by impregnating the pellet with Ba5SrWO62 at about 1700 degrees C in an inert atmosphere and subsequently firing for 2 minutes at 1800 degrees C in dry hydrogen. Author

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE