Rhenium-containing electrode for a high-pressure sodium discharg

Details Rhenium-containing electrode for a high-pressure sodium discharg Rhenium-containing electrode for a high-pressure sodium discharg

1988-05-04

1989-09-05

Wieder, Kenneth

Electric lamp and discharge devices

With gas or vapor

Electrode composition

313576, 313643, 313631, H01J 61073, H01J 6112

Patent

active

048641910

ABSTRACT:
A high-pressure sodium discharge lamp provided with a solid electrode consisting mainly of tungsten plus a small quantity of rhenium, and free of alkaline earth metals. The addition of rhenium suppresses sodium attack which caused the tip end of the electrode to break off before the desired lamp life was reached.

REFERENCES:
patent: 4002940 (1977-01-01), Ekkelboom et al.
patent: 4199701 (1980-04-01), Bhattacharya
patent: 4260929 (1981-04-01), Jacobs et al.
patent: 4320322 (1982-03-01), Rothwell, Jr. et al.
patent: 4475061 (1984-10-01), Van De Weijer et al.

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