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Composite crucible

A composite crucible and crucible technology, applied in silicon compounds, crystal growth, inorganic chemistry, etc., can solve the problems of increasing safety hazards, cracking, and reducing the service life of graphite substrates, so as to improve the water cooling effect and reduce the possibility of carbon pollution , the effect of improving the service life

Active Publication Date: 2015-03-25
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the method of adding the graphite substrate will be affected by external human operations. If there is foreign matter between the graphite substrate and the water-cooled copper crucible when adding the graphite substrate, or the silicon melt flows into the graphite lining during the smelting process In the gap between the bottom and the water-cooled copper crucible, cooling and solidification separates the graphite substrate from the water-cooled copper crucible, which will cause the graphite substrate to be heated unevenly during the electron beam melting process, and due to thermal stress during long-term melting It will crack, reduce the service life of graphite substrate, and increase the safety hazard in the melting process

Method used

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  • Composite crucible

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Embodiment 1

[0020] A composite crucible, the crucible includes a crucible body 8, the crucible body 8 is a cavity structure, and the inside is a cavity 7 for cooling liquid circulation; the upper surface of the crucible body 8 is a groove structure for To hold materials; the lower surface of the crucible body 8 is flat; the crucible body 8 is made of double-layer materials, wherein the outer layer is graphite and the inner layer is copper. Wherein the graphite layer and the copper layer are closely bonded, and the thickness of the graphite outer layer material is 25 mm; the thickness of the copper inner layer material is 10 mm.

[0021] The cavity 7 is provided with a partition 3 to reduce the flow velocity of the cooling liquid. The partitions 3 are fixed on the inner surface of the crucible body 8 , and the openings between the partitions 7 are facing and alternately staggered. The interval between the partitions is 15mm, the openings between the partitions are opposite and alternately...

Embodiment 2

[0024] A composite crucible, the crucible includes a crucible body 8, the crucible body 8 is a cavity structure, and the inside is a cavity 7 for cooling liquid circulation; the upper surface of the crucible body 8 is a groove structure for To hold materials; the lower surface of the crucible body 8 is flat; the crucible body 8 is made of double-layer materials, wherein the outer layer is graphite and the inner layer is copper. The graphite layer and the copper layer are closely bonded, and the thickness of the graphite outer layer material is 45mm; the thickness of the red copper inner layer material is 25mm.

[0025] The cavity 7 is provided with a partition 3 to reduce the flow velocity of the cooling liquid. The partitions 3 are fixed on the inner surface of the crucible body 8 , and the openings between the partitions 7 are facing and alternately staggered. The interval between the partitions is 35mm, the openings between the partitions are opposite and alternately stagg...

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Abstract

The invention relates to a composite crucible, and particularly relates to a composite crucible for improving the energy utilization rate of an electron beam melting technology. The composite crucible comprises a crucible body, wherein the crucible body is of a hollow cavity structure; a cavity for circulating of a cooling liquid is arranged in the crucible body; the upper surface of the crucible body is of a groove structure, and is used for containing materials; and the crucible body is formed by a dual-layer material, the outer layer is made of graphite, and the inner layer is made of copper. According to the composite crucible, the service life of the graphite layer is prolonged by at least 30%.

Description

technical field [0001] The invention relates to a composite crucible, in particular to a composite crucible which improves the energy utilization rate of electron beam melting technology. Background technique [0002] Electron beam smelting technology for removing volatile impurities in polysilicon, refractory metals and rare metals is relatively mature at present. The high energy density, high melting temperature and local overheating characteristics of electron beams can effectively remove volatile impurities in raw materials. Impurities. The general process of electron beam smelting is to use water-cooled copper as a melting crucible, and the electron beam acts on the material in the melting crucible to melt it, and finally solidifies into an ingot in the crucible as a product. [0003] However, the melting crucible currently used in the main technology is a water-cooled copper crucible, and the cooling circulating water introduced into the crucible will take away a larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/22C30B28/06C30B29/06C01B33/037
Inventor 姜大川王登科谭毅
Owner DALIAN UNIV OF TECH
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