Ceramic metal halide lamp shell

Abstract

The invention belongs to the field of ceramic light sources, and in particular relates to a ceramic metal halide lamp shell. The ceramic metal halide lamp shell comprises a discharging cavity and capillary tubes arranged at the two ends of the discharging cavity, wherein each capillary tube comprises an inner tube section and a welding groove which are connected with each other; the inner tube section is close to the discharging cavity; the welding groove is positioned on the end face; the inside diameter of the welding groove is greater than that of the inner tube section; the welding grooverealizes air-tight seal of the discharging cavity by padding a welding flux; part of the outer surface of the discharging groove is provided with a light reflecting material layer; and a glass transparent glaze layer is covered on the outer surface, not provided with the light reflecting layer, of the discharging cavity. The ceramic metal halide lamp shell has the advantages of simple encapsulation, good sealing effect, high luminous efficiency and the like.

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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