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A thermal field for casting high-efficiency polycrystalline

A thermal field and high-efficiency technology, applied in the field of solar photovoltaics, can solve the problems of low quality of edge silicon ingots and unequal solid-liquid interface curves, and achieve the effects of reducing lateral heat loss, inhibiting grain growth, and improving quality

Inactive Publication Date: 2015-07-29
ALTUSVIA ENERGY TAICANG
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

During the crystal growth process, due to the uneven temperature distribution of the thermal field, the solid-liquid interface curve of the silicon ingot is not flat, and the silicon ingot near the edge of the crucible will also grow preferentially, forming a convex part with the side facing inward, resulting in lower quality of the silicon ingot at the edge. middle part

Method used

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  • A thermal field for casting high-efficiency polycrystalline
  • A thermal field for casting high-efficiency polycrystalline
  • A thermal field for casting high-efficiency polycrystalline

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Embodiment Construction

[0020] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

[0021] A hot field for casting high-efficiency polycrystalline, comprising: heat insulation cage 1, heater 2, graphite heat exchange table 3, heat insulation felt 4, heat insulation board 5, active layer 6; the graphite heat exchange table is provided with There is a heat shield 5; the heat shield 5 is composed of three small heat shields from the inside to the outside; the three small heat shields are: heat shield A, heat shield B and heat shield C The heat shield A is located at the innermost la...

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Abstract

The invention discloses a thermal field for casting high-efficiency polycrystalline. The thermal field comprises a graphite heat exchange bench and a thermal insulation plate below the graphite heat exchange bench. The thermal insulation plate comprises multiple independently-movable small thermal insulation plate pieces. Through utilization of the multiple independently-movable small thermal insulation plate pieces, the distance between the thermal insulation plate and the graphite heat exchange bench can be adjusted according to different zone temperatures. Through the adjustment of the distance, heat distribution in silicon ingot crystallization can be changed; the uniformity of thermal field temperatures in ingot casting furnace crystallization is guaranteed; and polysilicon ingot quality is improved.

Description

technical field [0001] The invention belongs to the technical field of solar photovoltaics, and relates to a thermal field for casting high-efficiency polycrystals used in polycrystal ingot furnaces for casting high-efficiency polycrystals. Background technique [0002] The power generation of crystalline silicon cells mainly includes the following industrial chain: primary polysilicon→silicon wafer→cell→module→system power station. Under the same conditions, what people pursue is to get more electric energy. , each segment needs to obtain better raw materials, and the invention relates to the production of high-efficiency polycrystalline silicon ingots. [0003] Crystalline silicon mainly includes monocrystalline silicon and polycrystalline silicon. Since the manufacturing cost of polycrystalline silicon ingots is much lower than that of single crystal silicon rods, cast polycrystalline silicon is more and more widely used in the preparation of solar cells. [0004] At pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B11/00C30B29/06
Inventor 潘欢欢郭宽新邢国强孙海知宋江
Owner ALTUSVIA ENERGY TAICANG
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