Combined crucible for accommodating silicon materials

A combination and crucible technology, which is applied in the direction of polycrystalline material growth, crystal growth, chemical instruments and methods, etc., can solve the problems of low utilization rate of quartz crucibles, achieve waste utilization, increase filling factor, and high production cost.

Inactive Publication Date: 2011-05-25
JIANGXI SAI WEI LDK SOLAR HI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Another technical problem solved by the present invention is to well sol

Method used

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  • Combined crucible for accommodating silicon materials
  • Combined crucible for accommodating silicon materials
  • Combined crucible for accommodating silicon materials

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0061] Embodiment 1. A combined crucible for containing silicon material, which includes an upper cover 1 and a lower crucible 2, the upper cover 1 is stacked directly above the lower crucible 2, wherein the upper cover 1 is surrounded by an upper side wall 3. The lower crucible 2 includes a lower side wall 4 and a bottom plate 5, the lower side wall 4 is distributed around the bottom plate, and the upper side wall 3, the bottom side wall 4 and the bottom plate 5 jointly enclose a cavity where materials can be placed.

Embodiment 2

[0062] Embodiment 2. A combined crucible for containing silicon material, which includes an upper cover 1, a lower crucible 2, and the upper cover 1 is directly stacked on the lower crucible 2, wherein the upper cover 1 is surrounded by an upper side wall 3 The lower crucible 2 includes a lower side wall 4 and a bottom plate 5, the bottom side wall 4 is distributed around the bottom plate, and the upper side wall 3, the bottom side wall 4 and the bottom plate 5 jointly enclose a cavity where materials can be placed.

Embodiment 3

[0063] Embodiment 3. A combined crucible for containing silicon material, wherein: the adhesive 9 is spread between the upper cover 1 and the lower crucible 2. The rest is the same as in Example 1.

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Abstract

The invention relates to an ingot casting device for a silicon crystal in the field of solar photovoltaic, in particular to a combined crucible for accommodating silicon materials, and well solves the technical problem of low utilization rate of the conventional quartz crucible. The crucible is characterized by comprising an upper cover 1 and a lower crucible 2, wherein the upper cover 1 is stacked over the lower crucible 2 and is enclosed by an upper side wall 3; the lower crucible 2 comprises a lower side wall 4 and a bottom plate 5; the lower side wall 4 encloses the periphery of the bottom plate; and the upper side wall 3, the lower side wall 4 and the bottom plate 5 jointly form a cavity capable of accommodating materials. Therefore, more silicon materials can be filled, silicon liquid falls below an opening plane of the lower crucible after the silicon materials are melted into the silicon liquid, and the filling factor of the lower crucible is improved, namely the utilization rate of the lower crucible is improved, so that the yield of a single furnace per unit time is improved, silicon ingots with higher size and heavier weight are obtained, and the utilization rate of the silicon materials is improved.

Description

technical field [0001] The invention relates to a silicon crystal ingot casting device in the solar photovoltaic field, in particular to a combined crucible for containing silicon material. Background technique [0002] In the process of silicon crystal ingot casting, the quartz crucible is used to hold the silicon material, and the silicon material completes the whole process of melting, solidification and crystal growth in the quartz crucible. The amount of silicon material contained in the crucible cannot reach the proper weight of solid silicon filling the entire crucible due to the shape and volume of the silicon material. The ratio of the actual loaded capacity to the maximum available capacity is called the fill factor. Depending on the shape and volume of silicon materials, this filling factor can reach 30% to 70% in current polysilicon production, and in most cases it is about 60%. Take the DSS series polysilicon directional ingot casting furnace of GT Solar Tech...

Claims

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Application Information

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IPC IPC(8): C30B28/06
Inventor 胡动力张涛钟德京
Owner JIANGXI SAI WEI LDK SOLAR HI TECH CO LTD
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