ELECTRIC LAMP WITH SEALING FOIL

摘要

The invention relates to an electric lamp with a high lumen output and a low sensitivity to explosion, comprising a quartz-glass envelope having at least one sealed end, a thin foil comprising molybdenum at least partly embedded within said sealed end, a first current conductor connected to said foil extending interiorly of said envelope, and a second current conductor connected to said foil and extending exteriorly of said envelope, wherein the re-crystallized foil exhibits a yield strength (offset = 0.2 %) according to ASTM E 8M-91 below 300 MPa. This can be obtained by molybdenum doped with between 0.01 and 5 wt% of rhenium or 0.01 and 2 wt% of tungsten.. The invention further relates to a lamp with a molybdenum foil which is resistant to oxidation and corrosion comprising dopes of between 0.01 and 0.1 wt % of Ce and/or Ti, or dopes of between 0.01 and 1 wt% of A1, Co, Fe, Hf, Ir, and/or Y, or dopes of between 0.01 and 5 wt % of Cr.