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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 anti-oxidation performance, insufficient accuracy, and poor adhesion, achieve easy heating and cooling, increase service life, Not easy to layer effect

Inactive Publication Date: 2010-03-10
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

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Embodiment Construction

[0026] like figure 1 As shown, high-purity graphite felt (produced by Gansu Haoshi Carbon Fiber Co., Ltd.) treated at 2200° C. was selected as the green body material. According to the corresponding single crystal furnace size (16#, 18#, 20#, 24#), the mold is made, and the blank material is wound by an automatic winding machine at a rotation rate of 1 circle / 30s while brushing the adhesive and winding it to make the shape. The felt layer has a tight structure and is not easy to delaminate; then after curing, that is, in a high-temperature purification furnace, the green body is heated to 210 °C at a heating rate of 30 °C / h and cooled to 60 °C for 2 hours. The green body is solidified and formed; the green body is purified again, that is, N is introduced into the high temperature purification furnace. 2 with Cl 2 The gas is heated up to 2200°C at a heating rate of 30°C / h for purification treatment; the green body after purification treatment is formed; the surface is polishe...

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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 for thermal insulation materials, in particular to a manufacturing method of a hard composite graphite felt thermal insulation barrel for a single crystal furnace. technical background [0002] The existing hard composite graphite felt thermal insulation material for single crystal furnace is made by wrapping the soft graphite felt in a graphite barrel, which has the disadvantage of taking up a lot of space, troublesome installation, poor anti-oxidation performance, and short service life; the composite felt is wound by hand. Material, the layers are not tightly pasted, easy to delaminate, lack of precision, poor strength, poor energy saving effect, and low purity. SUMMARY OF THE INVENTION [0003] Aiming at the shortcomings of the existing manufacturing process of the hard composite graphite felt thermal insulation material for single crystal furnaces, the purpose of the present invention is to pr...

Claims

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Application Information

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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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