Crystalline silicon cast ingot heater

Abstract

The invention relates to a crystalline silicon cast ingot heater, which comprises a top heater, wherein the middle area has large thickness and small resistance, and the peripheral edge area has smallthickness and large resistance; a side heater, wherein the middle and upper areas have large thickness and small resistance, while the lower areas of the side heater have small thickness and large resistance. The resistance of the peripheral edge area of a top heater is large, which can increase the calorific value of the peripheral edge area of the top heater to compensate the radiation heat dissipation of the area, so that the temperature of the top heater is uniform; the resistance of the lower area of the side heater is large, so that the calorific value of the lower area of the side heater can be increased to compensate the radiation heat dissipation amount of the lower area of the side heater, and the temperature of the side heater is uniform; due to the uniform temperature of the top heater and the side heater, the cold wall effect and the nucleation of the side wall of the crucible can be reduced during the ingot casting process, so that the fluctuation of the crystal growth rate at the smooth crystal growth interface is smaller, thus reducing the diffusion of the crucible coating into the crystal ingot, reducing the dislocation defects in the upper part of the crystal ingot, and improving the quality of polycrystalline silicon ingot.

Description

technical field [0001] The invention relates to the field of preparation of crystalline silicon ingots in crystalline silicon solar energy, in particular to a crystalline silicon ingot heater. Background technique [0002] With the continuous reduction of non-renewable fossil energy such as coal, oil, and natural gas, the energy crisis has become increasingly serious, and due to the massive exploitation and wanton use of fossil energy, the problem of environmental pollution has become increasingly serious. The development and use of renewable, clean and non-polluting new energy that replaces fossil energy has become the most effective way to solve the energy crisis. Solar energy has the advantages of being clean, non-polluting and inexhaustible, and is an ideal alternative energy source for fossil energy. [0003] Industrial production of polysilicon ingot heaters generally use isostatic high-purity graphite heaters and CC heaters, which are mostly divided into two parts: t...

AI Technical Summary

Problems solved by technology

[0006] Based on this, it is necessary to provide a crystalline silicon ingot heater for the cold wall effect caused by radiation heat transfer, which affects the quality and conversion efficiency of silicon ingots.

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