Method for reducing molybdenum oxidation in lamps

Details Method for reducing molybdenum oxidation in lamps Method for reducing molybdenum oxidation in lamps

1992-05-04

1995-03-28

O'Shea, Sandra L.

Electric lamp and discharge devices

With gas or vapor

Having electrode lead-in or electrode support sealed to...

313331, 313345, H01J 1718, H01J 6136

Patent

active

054020387

ABSTRACT:
Electric lamps having molybdenum metal parts exposed to an oxidizing environment can withstand exposure to higher operating temperature if the molybdenum metal parts are coated with silicon nitride (Si.sub.3 N.sub.4). Tungsten-halogen lamps having molybdenum outer leads coated with silicon nitride have operated for over 1500 hours at about 450.degree. C. without oxidation failure of the leads.

REFERENCES:
patent: 3420944 (1969-01-01), Holcomb
patent: 3793615 (1974-02-01), Homonnay et al.
patent: 4015165 (1977-03-01), Hardies
patent: 4539509 (1985-09-01), Varshneya
patent: 5021711 (1991-06-01), Madden et al.

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