| 简介 |
A metal halide lamp with a ceramic discharge vessel, having conductive bushings comprising a cermet with a rare earth metal oxide-containing compound ceramic phase, is new. A metal halide lamp has a ceramic discharge vessel which has a filling comprising one or more rare earth metals and which is fitted with electrically conductive bushings passing vacuum-tightly through the vessel end seals. At least the discharge-facing front portion (45) of each bushing is in the form of a halide-resistant component of electrically conductive cermet comprising an electrically conductive phase and a ceramic phase which consists, at least at its surface accessible to the filling, of a compound of the ceramic base material with one or more rare earth metal oxides. Preferred Features : The cermet has a conductive phase of Mo, W, Re or their alloys or of MoSi2 and a ceramic phase of a garnet or perovskite of Al2O3 and one or more rare earth metal oxides. |
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