Dispenser cathode

Details Dispenser cathode Dispenser cathode

1991-01-29

1992-12-22

DeMeo, Palmer C.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For indirectly heated cathode

313346DC, H01J 128

Patent

active

051736330

ABSTRACT:
A dispenser cathode includes a tungsten matrix which is impregnated with an active cathode material and coated with a refractory thin film layer metal material along the surfaces thereto, but not including the electron emissive surface of the matrix, thereby improving a heat transfer efficiency from a heater to the electron emissive surface.

REFERENCES:
patent: 2700000 (1955-01-01), Levi et al.
patent: 2972078 (1961-02-01), Levi
patent: 4379979 (1983-04-01), Thomas et al.
patent: 4823044 (1989-04-01), Falce
patent: 4893052 (1990-01-01), Tanabe et al.

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