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Dual-layer ceramic crucible

A ceramic crucible and double-layer technology, which is applied in the direction of polycrystalline material growth, crystal growth, single crystal growth, etc., can solve the problems that cannot be reused, achieve high mechanical strength, reduce costs, and improve economic benefits

Inactive Publication Date: 2013-04-24
ALTUSVIA ENERGY TAICANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polycrystalline silicon ingot, one of the important auxiliary materials used is quartz crucible, which is used to hold polycrystalline silicon material, let the silicon material melt and grow in the crucible, and form polycrystalline silicon ingot. Expansion and crushing are disposable consumables during the entire polysilicon ingot casting process and cannot be reused

Method used

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  • Dual-layer ceramic crucible
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  • Dual-layer ceramic crucible

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The double-layer ceramic crucible is composed of a bottom surface and sides, the sides are perpendicular to the bottom surface, and the two sides are not connected to each other, such as figure 1 As shown, the appearance size of the crucible is 1040mm*1040mm*520mm, the thickness of the crucible is 20mm, the thickness of the outer layer 2 is 15mm, the thickness of the inner layer 1 is 5mm, the porosity of silicon carbide is 20%, and the porosity of silicon nitride The rate is 5%, the charge is 800kg, and the ingot is continuously cast.

Embodiment 2

[0023] The crucible adopts an integral structure, such as figure 2 , the appearance size of the crucible is 880mm*880mm*480mm, the thickness of the crucible is 25mm, the thickness of the outer layer 2 is 20mm, the thickness of the inner layer 1 is 5mm, the porosity of silicon carbide is 25%, and the porosity of silicon nitride is 8%, charging 480kg, continuous ingot casting.

Embodiment 3

[0025] The double-layer ceramic crucible is composed of a bottom surface and sides, the sides are perpendicular to the bottom surface, and the two sides are not connected to each other, such as figure 1 As shown, the appearance size of the crucible is 880mm*880mm*420mm, the thickness of the crucible is 20mm, the thickness of the outer layer 2 is 10mm, the thickness of the inner layer 1 is 10mm, the porosity of silicon carbide is 30%, and the porosity of silicon nitride The rate is 3%, the charge is 420kg, and the ingot is continuously cast.

[0026] Example Continuous service life (times) Ingot Yield Rate Cost reduction per unit weight of ingot Example 1 50 72% 9.5% Example 2 45 70% 8% Example 3 30 75% 7.5% Universal Quartz Crucible 1 68% 0

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Abstract

The invention discloses a dual-layer ceramic crucible. The dual-layer ceramic crucible is of a structure comprising an inner layer and an outer layer, wherein the outer layer is of a porous ceramic structure made of carborundum material; the inner layer is of a ceramic structure made of silicon nitride material; and the dual-layer ceramic crucible comprises a bottom surface and a side edge. According to the dual-layer ceramic crucible disclosed by the invention, due to the adoption of the porous ceramic structure of which the outer layer is made of carborundum material, high mechanical strength can be realized and the cost is reduced; the inner layer taking silicon nitride powder as a raw material is attached to the surface of the porous carborundum to form a ceramic structure, so that silicon materials in the crucible are prevented from being polluted and silicon ingots are not adhered to the silicon materials and the silicon ingots, the crucible can be repeatedly used, the cost generated by disposable consumption of the crucible is effectively reduced and economic benefits are increased; and the dual-layer ceramic crucible is suitable for industrial production.

Description

technical field [0001] The invention relates to a double-layer ceramic crucible. Background technique [0002] Solar energy is an inexhaustible and inexhaustible green energy. Solar photovoltaic technology is constantly developing. At present, crystalline silicon solar cells are the most widely used, accounting for more than 90% of all solar cells; crystalline silicon cells are divided into polysilicon Solar cells and monocrystalline silicon cells, of which polycrystalline silicon cells account for more than 70%, and polycrystalline silicon cells occupy an absolute dominant position in the entire solar cell. The crucible of the material is a must for polycrystalline ingots. [0003] Polycrystalline silicon ingot, one of the important auxiliary materials used is quartz crucible, which is used to hold polycrystalline silicon material, let the silicon material melt and grow in the crucible, and form polycrystalline silicon ingot. Expansion and crushing are disposable consumab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B28/06C30B29/06
Inventor 郭宽新邢国强
Owner ALTUSVIA ENERGY TAICANG