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Quartz crucible finished product crack defect detection method

A quartz crucible and defect inspection technology, applied in the direction of optical testing flaws/defects, etc., can solve the problems of damage, expansion, leakage of silicon liquid, etc., and achieve the effect of simple and fast operation and high efficiency

Active Publication Date: 2017-07-21
杭州大和江东新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If there are cracks in the crucible during ingot casting, the cracks will expand with the softening of the crucible material at high temperature and the pressure of the silicon material, resulting in the leakage of silicon liquid from the cracks, and the high temperature silicon liquid will affect the periphery of the crucible. Corrosion penetrates the graphite shield of the steel plate and can eventually leak into the ingot furnace, causing extremely dangerous damage to the ingot casting equipment

Method used

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  • Quartz crucible finished product crack defect detection method

Examples

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specific Embodiment example 1

[0027] A method for inspecting crack defects of finished quartz crucible products, comprising the steps of:

[0028] (1) Dry the finished quartz crucible until the moisture content of the finished quartz crucible is ≤0.1%.

[0029] (2) Place the finished quartz crucible after drying on the inspection table, and blow it clean with an air gun. The air pressure of the air gun is 0.3Mpa.

[0030] (3) Use a watering can filled with pure water to spray water on the area to be tested on the finished quartz crucible after the dust blowing treatment to fully wet the area to be tested. The quality standard of pure water is: the resistivity is 3.5MΩ.cm. At the same time, use a 500W iodine-tungsten lamp on the other side (outer side of the quartz crucible) corresponding to the water spraying surface of the finished quartz crucible (the inner side of the quartz crucible), and use a visual method to check whether there are cracks on the water spraying surface.

[0031] Move the watering ca...

specific Embodiment example 2

[0033] A method for inspecting crack defects of finished quartz crucible products, comprising the steps of:

[0034] (1) Dry the finished quartz crucible until the moisture content of the finished quartz crucible is ≤0.1%.

[0035] (2) Place the finished quartz crucible after the drying treatment on the inspection table, and blow the dust with an air gun. The air pressure of the air gun for dust blowing is 0.6Mpa.

[0036] (3) Use a watering can filled with pure water to spray water on the area to be tested of the finished quartz crucible after the dust blowing treatment to fully wet the area to be tested. The quality standard of pure water is: the resistivity is 4MΩ.cm. At the same time, use a 500W iodine tungsten lamp on the other side (inner side of the quartz crucible) corresponding to the water spraying surface of the finished quartz crucible (the outer side of the quartz crucible) to irradiate through light, and visually check whether there are cracks on the water sprayi...

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Abstract

The invention discloses a quartz crucible finished product crack defect detection method. According to the quartz crucible finished product crack defect detection method, a dried quartz crucible is subjected to surface dust blowing treatment, water spraying is performed on the crucible detection area by using a watering can filled with pure water, and light transmitting irradiation is performed with a 500 W iodine tungsten lamp to detect the crack in the crucible. With the method of the present invention, the fine crack can be accurately found, the operation is simple and quick, and the efficiency is high.

Description

technical field [0001] The invention relates to a quality detection method of a quartz crucible, in particular to a crack defect detection method of a finished quartz crucible. Background technique [0002] Quartz crucible is a container used to produce polysilicon ingots, and is the most consumed consumable in the polysilicon production process except polysilicon raw materials. Its production technology is difficult, the raw material purity is high, and the use environment is harsh. It needs to work continuously for more than 50 hours at a time at a high temperature of 1550 ° C. It is an irreplaceable key consumable material in the polysilicon production process. In addition, in the face of the shortage of high-purity polysilicon raw materials, many countries have carried out smelting and purification of polysilicon raw materials based on the principle of polysilicon ingot casting, and quartz crucibles have also played an equally important role in it. Therefore, it has an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88
Inventor 周勇李卫川上泉寺西久広占克文
Owner 杭州大和江东新材料科技有限公司
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