Method for manufacturing integrated ceramic metal halide lamp electric arc tube

Abstract

The invention provides a method for manufacturing an integrated ceramic metal halide lamp electric arc tube, which comprises the following steps: 1, mixing raw materials into a sizing material; 2, manufacturing a blank tube, namely using a die to manufacture the blank tube by treating the well mixed sizing material in an extrusion forming mode or in an injection molding mode; 3, manufacturing a blank body, namely putting the blank tube into an electric arc tube die and adopting a thermal hydraulic pressing mode to manufacture the blank tube into a rounding-off integrated electric arc tube blank body; 4, performing degreasing and plastic removal on the blank body; 5, pre-sintering the blank body at a pre-sintering temperature controlled between 1,200 and 1,400 DEG C; 6, performing hydrogen sintering at a sintering temperature controlled between 1,850 and 1,950 DEG C; and 7, cooling the tube to obtain the integrated ceramic metal halide lamp electric arc tube. The method has the advantages of simple and reliable manufacturing process, reduced production cost, high yield, and no environmental pollution.

Description

technical field [0001] The invention relates to the technical field of electric light sources, in particular to a method for manufacturing an integrated polycrystalline translucent alumina ceramic metal halide lamp (metal halide lamp) arc tube. Background technique [0002] Due to the characteristics of acid and alkali resistance, high temperature resistance and chemical stability of ceramic materials, metal halide lamp arc tubes made of ceramic materials have higher operating temperature, higher luminous efficiency and better color rendering than metal halide lamp arc tubes made of quartz. Therefore, ceramic metal halide lamps have been greatly developed in recent years and widely promoted in the field of lighting, which is the direction of human lighting development. [0003] At present, the arc tubes of ceramic metal halide lamps are mainly made of translucent polycrystalline alumina ceramics. Practice has proved that the integrated translucent polycrystalline alumina cer...

AI Technical Summary

Problems solved by technology

Chinese patents ZL97117991.3, ZL00122245.7, ZL03131897.5, ZL200610035124.9, ZL200610232512.9 disclose the manufacturing method of ceramic metal halide lamp arc tube, which is mainly made of 2-piece, 3-piece, 5-piece and other combinations Due to the uneven thickness of the ceramic tube, it is easy to accumulate high-temperature liquid metal halides at the cold end of the arc tube, which is very corrosive to the arc tube, resulting in light decay and failure of the lamp, resulting in uneven temperature distribution and stress concentration. break

The disadvantage of this method is that the removal process of the inner core material is slow and strict, and a little carbon residue will cause waste products, so the manufacturing cost of the inner core is very high, and volatile materials will also cause environmental pollution

Another method is as described in U.S. Patent US6620272B2: firstly manufacture the hollow body with symmetrical half-axis directions, and then use local heating to melt the adhesive on the butt joint surface, and apply pressure to bond them into a whole. More complicated, it is difficult to ensure a firm bond

Images