Unlock instant, AI-driven research and patent intelligence for your innovation.

A side wall heat compensation device of polysilicon directional solidification equipment

A technology of directional solidification and heat compensation, applied in the direction of polycrystalline material growth, crystal growth, chemical instruments and methods, etc., can solve the problems of high energy consumption, complex heating structure, difficult to maintain solidification front, etc., to save power consumption, simplify Structure, the effect of excellent purification effect

Inactive Publication Date: 2015-12-09
XIAMEN UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of the existing solar-grade polysilicon directional solidification equipment, such as complex heating structure, huge energy consumption, and difficulty in maintaining the level of the solidification front, to provide simple and reliable equipment that can greatly reduce energy consumption and cost, and can maintain polysilicon. A side wall heat compensation device for polysilicon directional solidification equipment with rising solidification front level and excellent purification quality

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A side wall heat compensation device of polysilicon directional solidification equipment
  • A side wall heat compensation device of polysilicon directional solidification equipment
  • A side wall heat compensation device of polysilicon directional solidification equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The heating device (graphite heater) is installed 4-6mm higher than the upper part of the crucible. The upper opening of the cavity section of the heat compensation device is 30mm, the bottom length is 200mm, and the angle between the slope and the bottom surface is 78°. In the inner surface of the cavity, the inclined surface is made of high-density, high-temperature-resistant black fiber plate, and the surface roughness is between Ra6.3 and Ra12.5; the vertical surface in contact with the crucible is made of high-strength graphite plate, and the surface roughness is Ra3.2; the bottom surface of the cavity is made of ceramic material, the surface is polished, and the surface roughness is Ra0.1.

Embodiment 2

[0027] The heating device (graphite heater) is installed 8mm higher than the upper part of the crucible. The upper opening of the cavity section of the thermal compensation device is 20mm, the bottom length is 250mm, and the angle between the slope and the bottom surface is 73°. In the inner surface of the cavity, the inclined and vertical surfaces are made of high-strength graphite sheet, with surface roughness of Ra6.3 and Ra3.2 respectively; the bottom of the cavity is made of ceramic material, with surface polishing treatment, and surface roughness of Ra0.2.

Embodiment 3

[0029] The heating device (graphite heater) is installed 5mm higher than the upper part of the crucible. The upper opening of the cavity section of the thermal compensation device is 40mm, the bottom length is 220mm, the inclined surface is slightly concave, and the angle with the bottom surface is 75°. In the inner surface of the cavity, the slope is made of high-density, high-temperature-resistant black fiber plate with a surface roughness of Ra12.5; the vertical surface in contact with the crucible is made of high-strength graphite plate with a surface roughness of Ra1.6; The bottom surface of the body is made of ceramic material, the surface is polished, and the surface roughness is Ra0.05.

[0030] Basic principle of the present invention is as follows:

[0031] Take a certain section of the heat compensation device on the side wall, set the inner slope of the cavity as plane I, the vertical plane as plane II, the bottom plane as plane III, and the top heating device plan...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a sidewall heat compensation device of a polysilicon directional solidification device, relating to polysilicon. The invention provides the sidewall heat compensation device of the polysilicon directional solidification device, which can greatly reduce energy consumption and cost, enable equipment to be simple and reliable, keep the polysilicon rising along the horizontal direction before solidification and realize excellent purification quality. The sidewall heat compensation device is provided with a top cover, a heating device, a housing, a heat preservation layer, a crucible and a heat dissipation plate, wherein the top cover is arranged at the top of the housing, the heating device and the crucible are arranged in a cavity of the housing, the heating device is arranged above the crucible, and the edge of the heating device extends to the upper part of the cavity; the heat preservation layer wraps the outer side and the bottom in the cavity, a silicon solution is contained in the crucible, and the heat dissipation plate is arranged under the crucible and closely jointed with the crucible.

Description

technical field [0001] The invention relates to polysilicon, in particular to a side wall heat compensation device of polysilicon directional solidification equipment. Background technique [0002] Today, when advocating low-carbon emission reduction, solar energy has become a green energy that has attracted much attention. Polysilicon is currently the most widely used solar cell material. Generally, in the process of metallurgical purification of solar-grade polysilicon (6N grade), directional solidification is an important step in the removal of impurities. At present, there are two commonly used directional solidification methods: heat exchange method (HEM) and Bridgman method ( Bridgman). Internationally, many polysilicon manufacturers such as Japan Kyocera, Germany Bayer, France Fort Wacker and other companies have adopted the heat exchange method. During the directional solidification process, the solidification front of silicon can keep rising and the purification e...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/06C30B28/06
Inventor 朱徐立洪永强
Owner XIAMEN UNIV