Electric lamp
AssigneeKoninklijke Philips Electronics N.V.
InventorsChrysostomus Hidde Maria Maree, Jiajun Wang
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Abstract
An electric lamp includes a quartz-glass envelope having at least one sealed end, a thin foil including molybdenum at least partly embedded within said sealed end, a first current conductor connected to the foil extending interiorly of the envelope, and a second current conductor connected to the foil and extending exteriorly of the envelope. The re-crystallized foil exhibits a yield strength (offset=0.2%) according to ASTM F 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.
Claims10
A lamp comprising:
- a quartz-glass envelope having at least one sealed end,
- a 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 foil after being re-crystallized exhibits a yield strength (offset=0.2%) according to ASTM E 8M-91 below 300 MPa, and
- wherein the foil comprises molybdenum doped with between 0.01 and 4 wt % of rhenium.
A lamp 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 foil comprises molybdenum doped with between 0.01 and 4 wt % of rhenium and further doped with either 0.01 and 1 wt % of Co, Fe, and/or Ir, or with between 0.01 and 5 wt % of Cr.
A lamp comprising:
- an envelope having a sealed end;
- a foil at least partly embedded within the sealed end;
- and
- conductors connected to ends of the foil;
- wherein the foil comprises molybdenum doped with 0.9 wt % of rhenium.
Dependencies are inferred from the claim text.