Method of making a borided dispenser cathode

Details Method of making a borided dispenser cathode Method of making a borided dispenser cathode

1983-02-22

1985-07-23

Lawrence, Evan K.

Electric lamp or space discharge component or device manufacturi

Process

Electrode making

148 203, 445 50, H01J 904

Patent

active

045306699

ABSTRACT:
A borided dispenser cathode of the type including a metallic base material is made by cleaning the cathode by annealing it in a hydrogen-containing atmosphere, depositing boron on the cathode by heating the cathode in an atmosphere containing a gaseous boron compound, and forming a boride of the metallic base material by heating the cathode to its operating temperature in a non-reactive atmosphere and maintaining the temperature for a time period sufficient to enable deposited boron to combine with the metallic base material.

REFERENCES:
patent: 1909680 (1933-05-01), Hunter, Jr.
patent: 2107945 (1938-02-01), Hull et al.
patent: 2494267 (1950-01-01), Schlesinger et al.
patent: 3016472 (1962-01-01), Coppola
patent: 4369392 (1983-01-01), Hotta et al.

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