| 摘要 |
<p>The high-pressure metal halide discharge lamp comprises a quartz-glass lamp vessel (1) with an ionizable filling. Said quartz-glass lamp vessel has two electrodes (2) which are connected to current conductors (3). The electrodes are provided with an emitter (6). Said emitter 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 and oxides of the elements whose atomic numbers range from 58 to 71. The lamp in accordance with the invention, which is provided with this emitter, exhibits a good maintenance and a very small color shift during its lifetime.</p> |
