TUNGSTEN COMPOSITE ELECTRODE

摘要

The invention describes an electrode of a high-pressure gas discharge lamp, comprising a core (3) made of tungsten or tungsten doped with potassium, of a diameter di and a shell (4) attached thereto, of an external diameter da, wherein the shell consists of a particle composite material, at least in some regions, with a matrix made of tungsten, and the following condition is met: di <= da / 3. The electrode according to the invention has considerably lower arc instability.