Manufacturing method for quartz ceramic crucible used for polycrystalline silicon ingot

Abstract

The invention relates to a manufacturing method for a quartz ceramic crucible used for a polycrystalline silicon ingot. The manufacturing method comprises the following steps: with fused silica with purity of 99 to 99.9 wt% as a raw material, crushing particles of the raw material by using a sand powder preparation device 101, screening prepared fused silica sand powder and preparing, by weight, 15% of 0-mesh to 400-mesh fused silica sand powder, 15% of 400-mesh to 200-mesh fused silica sand powder, 25% of 200-mesh to 100-mesh fused silica sand powder, 30% of 100-mesh to 40-mesh fused silica sand powder and 15% of 40-mesh to 20-mesh fused silica sand powder; putting the prepared fused silica sand powder materials in different containers for subsequent usage in a sequence from fine fused silica sand powder material to coarse fused silica sand powder material; and subjecting the prepared fused silica sand powder materials to treatment by a mixed slurrying device 102, a forming device 103, a wax discharging device 104, a sintering device 105, a polishing device 106 and a surface treatment device 107 so as to produce the finished quartz ceramic crucible used for the polycrystalline silicon ingot. The manufacturing method provided by the invention can effectively reduce product cost, improve the qualified rate of the crucible and realize large scale production and has wide application prospects.

Description

technical field [0001] The invention relates to a technology for manufacturing quartz ceramic materials, in particular to a method for manufacturing a quartz ceramic crucible for polycrystalline silicon ingots. Background technique [0002] With the acceleration of the global industrialization process, it can be predicted that oil and coal will gradually run out in the next 50 years. way out. [0003] Therefore, countries are now taking the development and utilization of solar energy as a new energy source that can replace oil and coal in the future, and formulate main contents and long-term plans as soon as possible. [0004] The photovoltaic industry using solar energy has become the fastest growing industry in the world. The rapid development of solar photovoltaic cells has caused continuous tension in global solar polysilicon wafers, and the polysilicon industry has become a hot spot for global investment. In my country, polysilicon production has become a new industr...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome the defects in the existing quartz ceramic material manufacturing technology, and provide a method for manufacturing a quartz ceramic crucible for polycrystalline silicon ingots. The technical problem to be solved is to prepare a quartz ceramic crucible by hot die-casting. Different from the grouting molding process and the coagulation molding process, it overcomes the complexity and limitation of the current quartz ceramic crucible preparation process for polysilicon ingots. The manufacturing method of the present invention can effectively reduce the cost of the quartz ceramic crucible and improve the qualified product rate and yield, ideal for practical

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