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Method for preparing graphite film with high heat conductivity

A technology of high thermal conductivity graphite and original film, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problem of unsatisfactory thermal conductivity of graphite film, and achieve the goal of reducing surface point defects and shrinkage Effect

Active Publication Date: 2014-06-18
SHUZHOU GU CARBON NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal conductivity of the graphite film prepared by this method is still not very ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The polyamide film is used as the original film, and it is subjected to plasma treatment. The treated polyamide film is fixed with a graphite frame and placed in a high-temperature furnace for heat treatment. The heat treatment is carried out in the same high-temperature furnace. The process is as follows: close the high-temperature furnace, put The temperature in the furnace is raised to 500°C, and the vacuum pump is used to depressurize it to 10Pa. After keeping it for 1 hour, continue to raise the temperature, and then raise the temperature to 1000°C in 2 hours. Inject nitrogen into the high-temperature furnace while continuing to use the vacuum pump to keep the pressure in the furnace at 40Pa. After keeping for 2 hours, continue to raise the temperature, raise the temperature to 2400°C within 3 hours, pass argon gas into the high-temperature furnace, keep the pressure in the furnace at 30Pa, keep the time for 2 hours, continue to raise the temperature, raise the tem...

Embodiment 2

[0033] The polyimide film is used as the original film, and it is treated with plasma, and the treated polyamide film is fixed with a graphite frame and placed in a high-temperature furnace for heat treatment. The heat treatment is carried out in the same high-temperature furnace. The process is: close the high-temperature furnace , raise the temperature in the furnace to 300°C, and use a vacuum pump to reduce the pressure to 1Pa, keep the temperature for 5 hours, then continue to raise the temperature, and then raise the temperature to 720°C in 2 hours, feed nitrogen into the high-temperature furnace, and continue to use the vacuum pump to maintain the pressure in the furnace Keep the temperature at 10Pa, keep it for 3 hours, continue to heat up, and raise the temperature to 1600°C within 3 hours, continue to feed nitrogen into the high-temperature furnace, keep the pressure in the furnace at 10Pa, keep it for 2 hours, continue to heat up, and raise the temperature to 2600°C ...

Embodiment 3

[0036] The polyimide film is used as the original film, and it is subjected to plasma treatment. The treated polyamide film is fixed with a graphite frame and placed in a high-temperature furnace for heat treatment. The heat treatment is carried out in different high-temperature furnaces. The process is as follows: In a high-temperature furnace, close the high-temperature furnace, raise the temperature in the furnace to 650°C, and use a vacuum pump to depressurize it to 15Pa, keep the temperature for 1 hour, then continue to raise the temperature, and raise the temperature to 1100°C in 2 hours, and pass argon into the high-temperature furnace. At the same time, continue to use the vacuum pump to keep the pressure in the furnace at 50 Pa for 1 hour; then in the second high-temperature furnace, close the high-temperature furnace, raise the temperature in the furnace to 2400 ° C within 2 hours, and pass argon into the high-temperature furnace At the same time, continue to use th...

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Abstract

The invention relates to a method for preparing a graphite film with high heat conductivity. According to the method, a macromolecular film serves as a main raw material, surface groups of the film are activated through plasma treatment, then, a crystalline carbon foam film, of which the main component is carbon, is prepared through stepwise heating while factors, such as atmosphere and pressure, are controlled, and then the graphite film with high heat conductivity, which has soft and smooth surfaces and uniform thickness, is obtained through a rolling or laminating process. The graphite film prepared by using the method disclosed by the invention is uniform in thickness and high in heat conductivity.

Description

technical field [0001] The invention specifically relates to a preparation method of a high thermal conductivity graphite 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, tablet computers, etc.), relevant manufacturers urgently need to improve the utilization rate of the internal space of electronic products. The heat is not easy to discharge, and it is easy to accumulate rapidly to form high temperature. Obviously, high temperature will reduce the performance, reliability and service life 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 operation o...

Claims

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Application Information

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IPC IPC(8): C01B31/04
CPCC01B32/205
Inventor 赖优萍
Owner SHUZHOU GU CARBON NEW MATERIAL
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