Ceramic metal halide lamp shell

Abstract

A ceramic metal halide lamp shell includes a discharge cavity (6) and capillaries (7) positioned on two ends of the discharge cavity (6). Wherein, the capillary (7) includes an inner tube (71) and a weld slot (72) which is connected to the inner tube (71). The inner tube (71) closes to the discharge cavity (6), and the weld slot (72) is formed on the end of the capillary. The inner diameter of the weld slot (72) is larger than that of the inner tube (71). The weld slot (72) can seal the discharge cavity (6) by a solder (73) to realize a gas-tight seal. A reflectorized material layer (8) is positioned on a part of outer surface of the discharge cavity (6), and on the other outer surface of the discharge cavity (6) where the reflectorized material layer (8) doesn't positioned is covered with a transparent glaze layer (9).

Description

technical field [0001] The invention belongs to the field of ceramic light sources, in particular to a ceramic metal halide bulb shell. Background technique [0002] At present, translucent alumina tubes around the world mainly have an integrated structure, a two-piece structure, a three-piece structure, or even a five-piece structure, but there is one structure that is basically the same, that is, the capillary part is a straight cylinder structure and a discharge chamber. The inner surface is basically a quadric surface structure such as a cylinder, an ellipsoid, and a sphere. [0003] In addition, the current sealing method used by ceramic metal halide lamp manufacturers is to heat the glass solder together with the ceramic tube and electrodes. The melting point of the glass solder is lower than the softening point of the ceramic, and it needs to have good fluidity after melting to penetrate In the gap between the ceramic capillary and the electrode assembly, the sealing...

AI Technical Summary

Problems solved by technology

[0004] like figure 1 As shown, the ceramic metal halide bulb shell is composed of a discharge chamber 1 and capillary tubes 2 arranged at both ends of the discharge chamber 1. The capillary tube 2 is a straight cylindrical structure. The electrodes of this structure are sealed by filling the capillary tube 2 and the electrode rod 4 with glass solder 3. The gap is completed, so that there is a larger gap between the capillary 2 and the electrode rod 4, the larger gap will cause the halogen to enter the gap and cause losses

Moreover, in the prior art, a bell-mouth structure 5 is formed at the junction of the capillary 2 and the discharge chamber 1. This structure is easy to form a cold spot, where gold halide deposits are prone to occur, so that the halides do not all participate in the cycle, and cause its adverse effect on the metal halide. The erosion of ceramic metal halide lamps affects the working efficiency and life of the finished lamps

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