Thermionic wick electrode for discharge lamps

Details Thermionic wick electrode for discharge lamps Thermionic wick electrode for discharge lamps

1974-10-07

1976-10-26

Demeo, Palmer C.

Electric lamp and discharge devices

With magnetic device

Field transverse to discharge

313 2H, 313213, 313218, 313229, 313346R, H01J 114, H01J 61073, H01J 6120

Patent

active

039886298

ABSTRACT:
An improved electrode particularly suitable for operation at high current densities in vapor discharge lamps in which the pressure is upwards of 1 atmosphere. It comprises a porous matrix of refractory metal impregnated with a glassy emission material which becomes fluid or produces a fluid component at the operating temperature. The emission material comprises a low work function metal oxide and a glass forming component, preferred emission materials being lanthanum borate and lanthanum silicate.

REFERENCES:
patent: 2162414 (1939-06-01), Abbott
patent: 3437865 (1969-04-01), Gabor et al.
patent: 3530327 (1970-09-01), Zollweg et al.
patent: 3619699 (1971-11-01), White
patent: 3700951 (1972-10-01), Clarke et al.

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