Tool for detecting quartz crucible

Abstract

The invention provides a tool for detecting a quartz crucible, comprising a circular ring-shaped outer snap ring and a circular ring-shaped inner snap ring. The inner diameter of the outer snap ring is the permitted biggest outer diameter of the quartz crucible with an additional length of 2-5mm, wherein an integral is preferable; and the biggest outer diameter of the inner snap ring is the permitted smallest inner diameter r of the quartz crucible, or can be slightly smaller, and is preferable between r and r-1 mm. The invention has the advantages that the structure is simple, the size and the circular degree of the quartz crucible can be simply detected, the quartz crucible can not be damaged and pollution is not caused.

Description

technical field [0001] The invention relates to a tool for detecting the size and roundness of a quartz crucible in a conventional environment. Background technique [0002] Quartz crucibles for silicon single crystals such as figure 1 As shown: the inner surface has a smooth coating, it is strictly forbidden to recontaminate after unpacking, the upper part is a cylinder, and the outer circle and wall thickness of each place ("everywhere" represents roundness) have specific dimensions Requirements; the bottom is bowl-shaped, which fits well with the graphite crucible. [0003] Quartz crucibles for photovoltaics are generally tested by the crucible manufacturer in a very clean environment and delivered to the single crystal manufacturer for use, and the package can be used immediately after unpacking. For single crystal manufacturers, necessary testing is also required for incoming raw and auxiliary materials. The outer diameter of an 18-inch crucible is about 450mm, and t...

AI Technical Summary

Problems solved by technology

If you use a general caliper to measure the size and roundness of the quartz crucible, since the caliper is tested from the top, it is difficult to determine the center of the crucible, which will cause a deviation of several millimeters, and the roundness of the entire crucible cannot be tested; due to the size Limitation, the size of the crucible cannot be tested by carding the outer diameter of the crucible

While using a caliper to find the center of the circle, especially the inner surface of the crucible is a very smooth coating, it will cause new pollution, and its roundness cannot be tested; the caliper is made of steel, and it is easy to cause quartz damage due to bumps during the test. Crucible Crack

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