Method for fabricating an electron-emission cathode

Details Method for fabricating an electron-emission cathode Method for fabricating an electron-emission cathode

1975-09-11

1976-07-27

Lazarus, Richard B.

Metal working

Barrier layer or semiconductor device making

Barrier layer device making

29 2517, 291821, H01J 912

Patent

active

039711102

ABSTRACT:
An improved technique for forming an electron emitting cathode of iridium d 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.

REFERENCES:
patent: 3069757 (1962-12-01), Beggs et al.
patent: 3164466 (1965-01-01), Yasuda et al.
patent: 3290124 (1966-12-01), Holtzclaw, Jr.

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