Metal holide lamp arc tube

Abstract

The present invention relates to an arc tube of metal halide lamp. It has a semitransparent alumina ceramic outer shell, two ends of said outer shell are equipped with a conductive leading wire respectively, and an electrode is mounted on one end of the conductive leading wire nearby cavity body of the outer shell, and the interior of intermediate cavity body is filled with a certain quantity of inert gas, mercury and metal halide of Sc, Na, Tl, In, Dy, Ho and Tm, etc., and said outer shell is made up by using two compacts through sintering process.

Description

Technical field [0001] The invention relates to the electrical industry, in particular to an arc tube of a metal halide lamp. Background technique [0002] At present, the arc tube shells of metal halide lamps in China are all made of quartz glass. Because quartz glass will produce a series of chemical reactions with metal halides at high temperatures and the leakage of metal ions, resulting in the loss of metal elements and electrode damage. Corrosion causes the ignition voltage, arc voltage drop and restart voltage to increase significantly during the use of the lamp, the light decay is large, the light color drifts seriously, and the life is affected, thus limiting the further improvement of the performance and life of the lamp. [0003] Because the chemical stability, corrosion resistance and high temperature resistance of alumina ceramics are significantly better than quartz glass, in recent years, several famous foreign electric light source companies have spent huge s...

AI Technical Summary

Problems solved by technology

However, most of the shells are made of five-piece sets, three-piece sets or integral sintering, but there are problems with complex manufacturing processes. At present, there is no metal halide lamp product that uses translucent alumina ceramics as the arc tube shell in China.

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