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Manufacturing method of graphite heat-conduction membrane

A technology of graphite heat conduction film and manufacturing method, applied in the direction of heat exchange materials, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of unable to meet the heat dissipation requirements of portable digital products, easy to drop powder, etc., achieve soft and smooth surface, reduce The effect of shrinkage and yield stability

Active Publication Date: 2015-04-08
SHUZHOU GU CARBON NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]However, the thermal conductivity of natural graphite film generally does not exceed 400W(M.K)-1, and there are also disadvantages such as easy powder loss, so it is increasingly unable to meet the heat dissipation of current portable digital products Require

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Put the polyimide film through plasma treatment, place graphite paper and polyimide film in the boat, there are 15 polyimide films in the middle of every two layers of graphite paper, put the boat into the carbonization furnace, and vacuum To 0.2KPa, the temperature is raised to 500°C at 10°C per minute; then the temperature is raised to 800°C at 8°C per minute, and finally the temperature is raised to 1100°C at 6°C per minute, and the temperature is kept constant for half an hour. Turn off the equipment, take out the boat after naturally cooling down to room temperature, and put it into the graphitization furnace. After evacuating the graphitization furnace, feed pure argon until the internal pressure is 1.2atm, raise the temperature at 10°C per minute to 1100°C, increase the pressure to 1.4atm; then raise the temperature at 6°C per minute, and the temperature will oscillate every time the temperature rises 200°C 20 minutes with an amplitude of 20 °C. After the temp...

Embodiment 2

[0036] Put the polyimide film through plasma treatment, place graphite paper and polyimide film in the boat, there are 3 polyimide films in the middle of every two layers of graphite paper, put the boat into the carbonization furnace, and vacuum To 0.05KPa, the temperature is raised to 400°C at 5°C per minute; then the temperature is raised to 700°C at 5°C per minute, and finally the temperature is raised to 1000°C at 2°C per minute, and the temperature is kept constant for half an hour. Turn off the equipment, take out the boat after naturally cooling down to room temperature, and put it into the graphitization furnace. After evacuating the graphitization furnace, feed pure argon until the internal pressure is 1.05atm, raise the temperature to 1000°C at 5°C per minute, and increase the pressure to 1.3atm; 5 minutes with an amplitude of 15 °C. After the temperature rises to 2300°C, reduce the pressure to 1.05atm, increase the temperature by 2°C per minute, and shake the tem...

Embodiment 3

[0038] Put the polyimide film through plasma treatment, place graphite paper and polyimide film in the boat, there are 50 polyimide films in the middle of every two layers of graphite paper, put the boat into the carbonization furnace, and vacuum To 0.5KPa, the temperature is raised to 600°C at 30°C per minute; then the temperature is raised to 900°C at 10°C per minute, and finally the temperature is raised to 1200°C at 8°C per minute, and the temperature is kept constant for half an hour. Turn off the equipment, take out the boat after naturally cooling down to room temperature, and put it into the graphitization furnace. After evacuating the graphitization furnace, feed pure argon until the internal pressure is 1.25 atm, raise the temperature to 1200°C at 30°C per minute, and increase the pressure to 1.8atm; 20 minutes with an amplitude of 20 °C. After the temperature rises to 3000°C, reduce the pressure to 1.2atm, increase the temperature by 5°C per minute, and shake the...

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Abstract

The invention relates to a manufacturing method of a graphite heat-conduction membrane. The manufacturing method comprises the following steps of 1, carrying out plasma treatment on a polyimide film, 2, arranging the 3-50 polyimide films treated by the step 1 between two graphite papers, and carrying out heating treatment to obtain a crystalline carbon foam film and 3, carrying out rolling or lamination so that the crystalline carbon foam film is processed to form the graphite heat-conduction membrane with the smooth surface. Compared with the existing manufacturing method, the manufacturing method improves production power by 1-5 times and has a stable yield rate. The graphite heat-conduction membrane has the soft and smooth surface and has no adverse surface and a heat conduction coefficient more than 1800w / (m.k). The heat conduction coefficient of the graphite heat-conduction membrane is higher than the highest value of 1000w / (m.k) of the product shown in the Panasonic patent with an application number of CN1816504A.

Description

technical field [0001] The invention relates to a method for manufacturing a graphite heat-conducting film. Background technique [0002] With the rapid development of semiconductor technology and the increasingly high requirements for portable performance of digital products such as mobile phones and tablet computers, relevant manufacturers urgently need to improve the utilization rate of the internal space of electronic products. However, the heat generated during operation is not easy to discharge, and it is easy to accumulate rapidly to form a high temperature. It is clear that high temperatures reduce the performance, reliability and lifespan of electronic equipment. Therefore, the current electronics industry has put forward higher and higher requirements for heat dissipation materials as the core components of thermal control systems, and there is an urgent need for a highly efficient heat-conducting, lightweight material to quickly transfer heat to ensure the normal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C09K5/14
CPCC01B32/205C09K5/14
Inventor 赖优萍
Owner SHUZHOU GU CARBON NEW MATERIAL
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