Method for producing quartz glass crucible by using electric arc rotary hot melting method

A technology of quartz glass crucible and hot-melt method, which is applied in the field of solar photovoltaics, can solve the disadvantages of preparing high-purity monocrystalline silicon products for solar photovoltaics, intensify the chemical reaction between silicon materials and quartz materials, and increase the contact surface between silicon materials and quartz materials And other problems, achieve good transparency effect, rapid and uniform temperature drop, and reduce energy consumption

Inactive Publication Date: 2012-03-14
扬州华尔光电子材料有限公司
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Problems solved by technology

[0003] The quartz glass crucible made by the traditional vacuum arc method will generate a certain number of bubbles of different sizes in the transparent layer due to rapid cooling, making the inner surface of the crucible uneven, increasing the contact surface between the silicon material and the quartz material, and aggravating the

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with specific embodiment:

[0014] A method for manufacturing a quartz glass crucible by an arc rotary thermal fusion method, comprising the following steps:

[0015] 1) Supply the high-purity quartz sand raw material to a mold that can be rotated, and form a crucible powder layer on the inner surface of the mold;

[0016] 2) Using electric arc for heating and melting, so that the powder layer is melted into a crucible matrix;

[0017] 3) After the powder layer is melted and formed, immediately shut down the arc, let the mold rotate, and start spraying hydrogen into the crucible for about 10 minutes, and the flow rate per minute is controlled at about 50ml, so that part of it will burn by itself at high ambient temperature and release A large amount of water vapor is released to form an atomizing atmosphere, and the temperature of the crucible is slowly dropped from about 2000°C to about 800°C to comp...

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Abstract

The invention discloses a method for producing a quartz glass crucible by using an electric arc rotary hot melting method. On the basis of a traditional vacuum arc method, a rotary die is additionally arranged for melting a crucible matrix; and the produced crucible blank is slowly cooled in a combustion atmosphere and bubbles and other structural defects inside a crucible are controlled, and thereby the construction strength of the crucible inner wall is improved and the aims of preventing a chemical reaction between a silicon material and a quartz material and improving the purity of a monocrystal silicon product are achieved. According to the method disclosed by the invention, hydrogen gas is sprayed on the just produced quartz glass crucible in rotary motion and high-temperature state and quickness and uniformity in cooling are realized; and the method is especially suitable for producing the quartz glass crucible with large caliber.

Description

technical field [0001] The invention relates to the field of solar photovoltaics, in particular to a method for manufacturing a quartz glass crucible by an arc rotary thermal fusion method. Background technique [0002] In recent years, as the proportion of monocrystalline silicon products in the solar photovoltaic field continues to increase, the demand for high-purity monocrystalline silicon is increasing, and the purity requirements for the quartz glass crucible used to prepare pure monocrystalline silicon are also increasing. improve. [0003] The quartz glass crucible made by the traditional vacuum arc method will generate a certain number of bubbles of different sizes in the transparent layer due to rapid cooling, making the inner surface of the crucible uneven, increasing the contact surface between the silicon material and the quartz material, and aggravating the deterioration of the silicon material. The chemical reaction with the quartz material will pollute the p...

Claims

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Application Information

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IPC IPC(8): C03B19/04C30B15/10
CPCY02P40/57
Inventor 池金林杨业林
Owner 扬州华尔光电子材料有限公司
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