Ultrathin high-thermal-conductivity graphite film and preparation method thereof

A technology of high thermal conductivity graphite and graphite film, applied in the field of heat dissipation, can solve problems such as not ideal

Inactive Publication Date: 2015-03-25
SHANGHAI JIEYUAN ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It should be pointed out that the artificial graphite film material produced by this method is not very ideal in terms of thermal conductivity, electrical conductivity and strength.

Method used

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Embodiment Construction

[0024] An ultra-thin graphite film with high thermal conductivity, the thickness of the graphite film is 8-10 microns, and the thermal conductivity is 1800-1900W / m·k.

[0025] A preparation method of ultra-thin high thermal conductivity graphite film, comprising the steps of:

[0026] Step 1, collecting polymer film materials for carbonization and graphitization, and performing carbonization;

[0027] In step 2, the carbonized film material after the carbonization treatment is subjected to heating treatment, so that it gradually reaches the graphitization temperature;

[0028] Step 3, take 2800°C as the temperature reference point, take the temperature reference point as the reference temperature, and perform two periodic oscillations under the condition of 2850-2950°C, the temperature oscillation period is 4-15 times, and complete the graphitization temperature The time is 10-180 minutes.

[0029] In this embodiment, the polymer film material used is polyimide (PI) film, an...

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Abstract

The invention relates to the technical field of heat dissipation and in particular relates to an ultrathin high-thermal-conductivity graphite film. The thickness of the graphite film is 8-10 microns, and the thermal conductivity coefficient is 1800-1900W/m.k. The method for preparing the ultrathin high-thermal-conductivity graphite film comprises the following steps: 1, collecting a polymer film material subjected to carbonization and graphitization treatment, and performing carbonization treatment; 2, heating a carbonized carbon film, so that the graphitization temperature is gradually reached; and 3, performing periodic oscillations for two times in a graphitization temperature range under the condition of the threshold range of 50-150 DEG C. According to the ultrathin high-thermal-conductivity graphite film disclosed by the invention, the high thermal conductivity coefficient of the graphite film is guaranteed, the thickness of the graphite is reduced, and the using cost of the graphite film is reduced. According to the method for preparing the ultrathin high-thermal-conductivity graphite film provided by the invention, the conventional process is optimized, raw materials are greatly saved, the production cost is reduced, and the production time is shortened.

Description

technical field [0001] The invention relates to the technical field of heat dissipation, in particular to an ultra-thin graphite film with high thermal conductivity and a preparation method thereof. Background technique [0002] At present, due to its excellent characteristics, including high thermal conductivity, heat resistance, corrosion resistance and high electrical conductivity, graphite film materials are widely used in heat dissipation of electronic products, heat-resistant sealing materials, heating elements and other technologies in current industrial applications. field. [0003] For example, among the currently widely used handheld terminals, smartphones need to use high thermal conductivity, light weight, and stable materials to realize the heat dissipation function due to their small size, high density of electronic components, and large heat generation. In practical applications, graphite film materials with high heat dissipation performance are an excellent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 李志文林剑锋朱秀娟侯玉婷张留成
Owner SHANGHAI JIEYUAN ENVIRONMENTAL SCI & TECH
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