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Quartz crucible, making method thereof, and special die therefor

A technology for quartz crucibles and molds, which is applied in the direction of manufacturing tools, glass manufacturing equipment, chemical instruments and methods, etc., and can solve problems such as difficulty in quartz sand

Inactive Publication Date: 2014-12-31
镇江荣德新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The size of the nucleation point can be controlled by controlling the particle size of the quartz sand, but how to accurately realize the uniform distribution and density control of the quartz sand is still a difficult problem

Method used

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  • Quartz crucible, making method thereof, and special die therefor
  • Quartz crucible, making method thereof, and special die therefor
  • Quartz crucible, making method thereof, and special die therefor

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Embodiment Construction

[0028] The structure of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0029] Such as figure 1 , figure 2 with image 3 As shown, a quartz crucible provided by the present invention includes an open crucible body 1, wherein the inner bottom surface of the crucible body 1 is uniformly provided with a plurality of blind holes 12 used as nucleation points in the polysilicon ingot casting process . The blind hole 12 is in the shape of a "small pit" and can be used as a nucleation point for polysilicon ingot casting. And its shape and distribution can be precisely controlled by a special mold.

[0030] Silicon wafers for solar cells are generally rectangular, so the polycrystalline silicon ingot crystals used to cut silicon wafers need to be processed into blocks with rectangular cross-sections during ingot casting. The inner bottom surface of the quartz crucible used in the polysilicon ingot casting process is...

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Abstract

The invention discloses a quartz crucible. The quartz crucible comprises an openmouthed crucible body, and the inner bottom of the crucible body is uniformly provided with a plurality of blind holes used in a polysilicon ingot casting technology as nucleation points. The inner bottom of the crucible body is uniformly provided with the blind holes used in the polysilicon ingot casting technology as nucleation points, and the initial stage supercooling degree of crystal growth is controlled through the cooperation of a thermal field with the technology, so small uniform crystal grains with certain dimensions can be obtained. The quartz crucible has the advantages of low making cost, and uniform and suitable nucleation points. The invention also discloses a making method of the quartz crucible, and a special die for making the quartz crucible.

Description

technical field [0001] The invention relates to crucible equipment used in polysilicon ingot casting technology, in particular to a quartz crucible. The invention also relates to a preparation method of the quartz crucible and a special mold for preparing the quartz crucible. Background technique [0002] Crystalline silicon solar cells are formed by a series of processes such as making PN junctions on the substrate of crystalline silicon wafers. Crystalline silicon wafers are the building blocks for solar cells. Crystalline silicon wafers are divided into polycrystalline silicon wafers and single crystal silicon wafers, which are cut from polycrystalline silicon ingot crystals and single crystal silicon ingot crystals respectively. Among them, the polycrystalline silicon ingot crystal is cast by a polycrystalline ingot casting furnace. The specific steps are: first, put the polycrystalline silicon raw material into a quartz crucible coated with a release agent (silicon ni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B28/06C30B29/06C03B20/00
Inventor 孟涛
Owner 镇江荣德新能源科技有限公司