Device for repairing quartz crucible with laser

Abstract

The invention discloses a device for repairing a quartz crucible with laser. The device comprises a laser device and a feeding device, wherein the laser device comprises a shell and a CO2 laser generator; the CO2 laser generator is arranged in the shell; a laser outlet is formed in the shell; the feeding device comprises a hopper and a feeding pipe; the feeding pipe is communicated with an outlet of the hopper; the hopper is arranged on the shell. Stains of the quartz crucible are fused and gasified by virtue of laser; quartz sand is used for filling; and the laser fusion repair process is used to repair the stains of the quartz crucible, so that the quartz crucible reaches the qualified requirements. The device is low in cost and convenient to use.

Description

technical field [0001] The invention relates to a device for repairing a quartz crucible, in particular to a device for repairing a quartz crucible with a laser. Background technique [0002] The growth of dislocation-free single crystals has strict requirements on the performance of quartz crucibles, such as extremely low impurity content, precise size, and good appearance characteristics. In the melting production process of quartz crucible, it may be contaminated by impurities brought in by a series of links such as raw materials, environment, equipment and personnel operation. The appearance characteristics of quartz crucible are air bubbles, black spots, white spots and other impurities. The high occurrence rate is the biggest problem affecting the qualified rate and causing troubles for quartz crucible manufacturers. Even in the qualified quartz crucible, there will be a large proportion of bubbles, black spots, white spots, etc. within the scope of some inspection sp...

AI Technical Summary

Problems solved by technology

Although some of these impurities or bubbles exist in the transparent layer of the quartz crucible, they are actually very close to the inner surface, and may be dissolved from the transparent layer due to the erosion of the quartz crucible by molten silicon during the growth of the single crystal. The release of containing gas into the silicon melt will affect the quality of silicon rods. These impurities may also contact the crystals grown at the interface and be introduced into the crystal structure to cause dislocations, which will reduce the yield of single crystals.

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