High-pressure metal halide discharge lamp

Electric lamp and discharge devices – With gas or vapor – Electrode composition

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Details

313570, 313346R, H01J 1704

Patent

active

060465441

ABSTRACT:
The high-pressure metal halide discharge lamp comprises a quartz-glass lamp vessel (1) with an ionizable filling and two electrodes (2) which are connected to current conductors (3). The electrodes are provided with an emitter (6) which contains tungsten as a main component and at least three oxides, a first oxide which is chosen from hafnium oxide and zirconium oxide, a second oxide being lanthanum oxide, and a third oxide which is chosen from yttrium oxide.

REFERENCES:
patent: 5530317 (1996-06-01), Willemsen et al.

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