HID Lamp electrode comprising barium-calcium niobate or tantalat

Details HID Lamp electrode comprising barium-calcium niobate or tantalat HID Lamp electrode comprising barium-calcium niobate or tantalat

1978-11-06

1982-03-23

Segal, Robert

Electric lamp and discharge devices

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

For plural electrodes of discharge device

252500, H01J 1706, H01J 6106

Patent

active

043215033

ABSTRACT:
For HID lamps, and particularly high-pressure mercury or sodium-mercury HID lamps, the electron-emissive material portion of the lamp electrodes is Ba.sub.3 CaM.sub.2 O.sub.9 wherein M is niobium, tantalum or any combinations thereof. The specified material is highly emissive, very refractory, and essentially completely non-reactive with respect to moisture.

REFERENCES:
patent: 2911376 (1959-11-01), Rudolph
patent: 3266861 (1966-08-01), Bleukens et al.
patent: 3434812 (1969-03-01), Bondley
patent: 3619699 (1971-11-01), White
patent: 3708710 (1973-01-01), Smyser et al.
patent: 3951874 (1976-04-01), Kern
patent: 3969279 (1976-07-01), Kern
patent: 4052634 (1977-10-01), Kok
Galasso, "Structure, Properties and Preparation of Perovskite-Type Compounds"; Pergamon Press, New York.

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