Manufacture process of thermal insulation bucket of hard composite graphite felt for single crystal furnace

A composite graphite, thermal insulation technology, applied in the direction of single crystal growth, manufacturing tools, applications, etc., can solve the problems of poor oxidation resistance, short service life, large space occupation, etc., achieves easy heating and cooling, and saves space in the furnace , the effect of increasing the service life

Inactive Publication Date: 2012-01-04
GANSU HAOSHI CARBON FIBER
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Problems solved by technology

[0002] The existing rigid composite graphite felt thermal insulation materials for single crystal furnaces are made by wrapping soft graphite felts with graphite barrels, which have the disadvantages of large space occupation, troublesome installation, poor oxidation resistance and short service life; the composite felts are wound by hand Materials, the layers are not tightly pasted, easy to delaminate, insufficient precision, poor strength, poor energy saving effect, and low purity

Method used

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  • Manufacture process of thermal insulation bucket of hard composite graphite felt for single crystal furnace
  • Manufacture process of thermal insulation bucket of hard composite graphite felt for single crystal furnace

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Embodiment Construction

[0026] like figure 1 As shown, the high-purity graphite felt (produced by Gansu Haoshi Carbon Fiber Co., Ltd.) treated at 2200°C was selected as the green body material. Make molds according to the corresponding single crystal furnace size (16#, 18#, 20#, 24#), and the green body material is wound and formed by brushing adhesive while winding at the rotation rate of 1 circle / 30s by the automatic winding machine, so that The structure between the felt layers is tight and it is not easy to delaminate; then after curing treatment, that is, in the high-temperature purification furnace, the green body is heated to 210°C at a constant temperature of 2 hours and cooled to 60°C at a heating rate of 30°C / h. The body is solidified and shaped; the body is purified again, that is, nitrogen is passed into the high-temperature purification furnace 2 with Cl 2 The gas is heated to 2200°C at a heating rate of 30°C / h for purification treatment; after purification treatment, the formed body i...

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Abstract

The invention relates to a manufacture process of a thermal insulation bucket of hard composite graphite felt for a single crystal furnace. The manufacture process comprises the following steps: selecting a blank material; winding composite graphite felt on a winding machine; curing and molding the blank; purifying the blank; mechanically cutting and processing the blank; polishing the surface; removing dust; processing the coating; and purifying the coating. The thermal insulation material of the hard composite graphite felt for the single crystal furnace has hard delamination, high strength, good thermal insulation effect, high purity, small density, high oxidation resistance and long service life, takes the energy-saving effect, replaces a graphite bucket, saves great space in the furnace and increases the crystal-pulling size of the single crystal furnace.

Description

technical field [0001] The invention relates to a surface treatment process of a thermal insulation material, in particular to a method for manufacturing a rigid composite graphite felt thermal insulation barrel for a single crystal furnace. technical background [0002] The existing rigid composite graphite felt thermal insulation materials for single crystal furnaces are made by wrapping soft graphite felts with graphite barrels, which have the disadvantages of large space occupation, troublesome installation, poor oxidation resistance and short service life; the composite felts are wound by hand Materials, the layers are not tightly pasted, easy to delaminate, insufficient precision, poor strength, poor energy saving effect, and low purity. Contents of the invention [0003] In view of the deficiencies in the existing production process of rigid composite graphite felt thermal insulation materials for single crystal furnaces, the purpose of the present invention is to p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B1/42C04B35/83C04B38/00C30B15/14
Inventor 郝相忠郝相国罗志仁江迎才
Owner GANSU HAOSHI CARBON FIBER
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