| 摘要 |
A ceramic discharge vessel has a hollow body with at least one receptor. A molybdenum tube is shrink-fit in the receptor, preferably in the form of capillaries. The shrink fit provides a hermetic seal without the use of glass frits or other additional sealing materials. An electrode having a rod portion is inserted into the molybdenum tube. The rod portion of the electrode is welded to the tube at a remote end of the tube. The inner diameter of the molybdenum tube is no more than 0.02 mm greater than the outer diameter of the rod portion of the electrode so that a gap of 0.01 mm or less is formed between the rod portion and the tube to inhibit pooling of the discharge medium, e.g., a metal halide fill, in the gap.
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