Metal halide lamp including ceramic sealing material
AssigneeKoninklijke Philips Electronics N.V.
InventorsSigrid Maria Roman Gelderland, Theodorus Gerardus Marinus Maria Kappen
Life of this patent
Estimating the term…
Abstract
A metal halide lamp includes a ceramic discharge vessel and two electrodes. The discharge vessel encloses a discharge volume containing an ionizable gas filling including at least a metal halide, two current lead-through conductors connected to the respective electrodes, and a seal of a sealing material through which at least one of the respective current lead-through conductors issues to the exterior of the discharge vessel. The sealing material of the seal includes a ceramic sealing material including cerium oxide, aluminum oxide and silicon dioxide as a mixture of oxides and/or one or more mixed oxides.
Claims6
A metal halide lamp comprising a ceramic discharge vessel and two electrodes, the discharge vessel enclosing a discharge volume containing an ionizable gas filling comprising at least a metal halide, two current lead-through conductors connected to the respective electrodes, and a seal including a sealing material through which at least one of the current lead-through conductors issues to exterior of the discharge vessel, wherein the sealing material of the seal comprises a ceramic sealing material comprising cerium oxide, aluminum oxide and silicon dioxide as a mixture of oxides and/or one or more mixed oxides, wherein the ionizable filling comprises NaI, TlI, CaI2 and REI3 (rare-earth iodide), wherein the filling comprises at least CeI3, and wherein the ceramic sealing material comprises 25 to 60 wt. % Ce2O3, 12 to 64 wt. % Al2O3 and 3 to 50 wt. % SiO2.
A metal halide lamp comprising a ceramic discharge vessel and two electrodes, the discharge vessel enclosing a discharge volume containing an ionizable gas filling comprising at least a metal halide, two current lead-through conductors connected to the respective electrodes, and a seal including a sealing material through which at least one of the current lead-through conductors issues to exterior of the discharge vessel, wherein the sealing material of the seal comprises a ceramic sealing material comprising cerium oxide, aluminum oxide and silicon dioxide as a mixture of oxides and/or one or more mixed oxides, wherein the ionizable filling comprises NaI, TlI, CaI2 and REI3 (rare-earth iodide), wherein the filling comprises at least CeI3, and wherein the ceramic sealing material comprises 30 to 57 wt. % Ce2O3, 20 to 48 wt. % Al2O3 and 10 to 22 wt. % SiO2.
A metal halide lamp comprising a ceramic discharge vessel and two electrodes, the discharge vessel enclosing a discharge volume containing an ionizable gas filling comprising at least a metal halide, two current lead-through conductors connected to the respective electrodes, and a seal including a sealing material through which at least one of the current lead-through conductors issues to exterior of the discharge vessel, wherein the sealing material of the seal comprises a ceramic sealing material comprising cerium oxide, aluminum oxide and silicon dioxide as a mixture of oxides and/or one or more mixed oxides, wherein the ionizable fillinq comprises NaI, TlI, CaI2 and REI3 (rare-earth iodide), wherein the filling comprises at least CeI3, and wherein the sealing material has a melting point below 1400° C.
Dependencies are inferred from the claim text.