Heat conductive graphite film preparation method and graphite crucible

A heat-conducting graphite film and graphite crucible technology, which is applied in the field of graphite crucibles, can solve the problems of unqualified heat-conducting physical and mechanical properties of large-scale graphite films, and achieve the effects of increasing single-time production, reducing production costs, and improving quality

Active Publication Date: 2016-06-22
SUZHOU JINHE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a method for preparing a heat-conducting graphite film and a graphite crucible, which are used to solve the problems of large-scale graphite film heat conduction and unqualified physical and mechanical properties

Method used

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  • Heat conductive graphite film preparation method and graphite crucible

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Please refer to figure 1 , the graphite crucible is a cubic graphite crucible 1, and the cubic graphite crucible 1 is provided with a cylindrical cavity 2, the original material film is placed in the cylindrical cavity 2, and the graphite crucible is stacked on In the carbonization furnace and graphitization furnace, the original film is carbonized and graphitized.

[0040] Further elaborate the preparation method of thermally conductive graphite film of the present invention:

Embodiment 2

[0042] Select a polyimide (PI) film coil material with a thickness of 70 μm and a width of 700 mm to prepare a mixed aqueous solution of ferric chloride and ferric nitrate with a mass concentration of 5%, wherein the content of ferric chloride is 4%, and the content of ferric nitrate It is 1%, and the aqueous solution contains 2% sodium lauryl sulfate. Unfold the PI film coil and pass it through the spraying device, spray a layer of the above mixed solution evenly on the surface, after spraying, evaporate the water through a dryer to obtain the original film, and compound a layer of 2mm thick on the original film. Graphite paper, then raw material film and graphite paper are wound and rolled, and the width of coiled material is suitable with raw material film coiled material size, and radius size is 95mm, selects and is long the graphite crucible described in embodiment 1 of 800mm, rolls The graphite crucible is loaded into a cylindrical cavity with a radius of 100mm, and the ...

Embodiment 3

[0048] Select the polyimide (PI) film roll material that thickness is 70 μm, and width is 720mm, the preparation mass concentration is the mixed ethanol solution of ferric chloride, cobalt chloride, ferric nitrate, cobalt nitrate, wherein ferric chloride The content is 3%, the content of cobalt chloride is 2%, the content of ferric nitrate is 3%, the content of cobalt nitrate is 2%, and the ethanol solution contains 1% of surfactant sodium lauryl sulfate. Spread the PI film through the spraying device, spray a layer of the above-mentioned mixed solution on the surface evenly, after spraying, evaporate the water through a dryer to obtain the original film, and compound a layer of graphite paper with a thickness of 2mm on the original film , and then wind the original film and graphite paper into a roll. The width of the coil is equivalent to the size of the original film coil, and the radius is 70mm. The graphite crucible of embodiment 1 with a length of 800mm is selected, and ...

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Abstract

The invention discloses a heat conductive graphite film preparation method. A high-molecular thin film coiled material with metal salt attached to the surface is used as a raw material film and placed into a graphite crucible for carbonization and graphitization, and finally a heat conductive graphite film is obtained through pressing. The metal salt powder attached to the surface of the raw material film and graphite paper can promote graphitization of the raw material film, the crystallinity of the graphite film is improved, and the quality of graphite film products is improved. The invention further provides the graphite crucible. The graphite crucible is a cuboid graphite crucible. Compared with a barrel type crucible in the prior art, the contact area of the graphite crucible and a boiler is increased, heat can be transferred to raw materials better during thermal treatment, the cuboid graphite crucible can be better stacked, production yield of a single time of a graphitization furnace is greatly increased, and production efficiency is improved.

Description

technical field [0001] The invention relates to a preparation method of a heat-conducting graphite film and a graphite crucible. Background technique [0002] With the development of electronic devices and related products in the direction of high integration, high density, and high computing, heat dissipation has become one of the key factors restricting the sustainable development of the electronics industry, and the development of thermal management materials with excellent thermal conductivity has become crucial. [0003] Traditional fin-shaped cooling devices are made of copper, aluminum and other materials. Although copper and aluminum are rich in natural resources and have good machinability, the thermal conductivity of copper and aluminum is too low, only 402W / (m·K) and 237W respectively. / (m K), seriously affects the heat dissipation performance of the device, and can no longer meet the heat dissipation requirements of the growing electronic products. Graphite has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
CPCC01P2006/32
Inventor 陈鑫
Owner SUZHOU JINHE NEW MATERIAL
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