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Graphitization process of artificial graphite heat dissipation film

A technology of artificial graphite and graphitization, applied in the direction of inorganic chemistry, carbon compounds, heat exchange materials, etc., can solve the problems of short heating time, low maximum temperature, poor bending resistance and thermal conductivity of artificial graphite heat dissipation film, etc. Achieve the effect of improving bending resistance and thermal conductivity, and prolonging the heating time

Inactive Publication Date: 2021-03-26
安徽恒炭新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a graphitization process of artificial graphite heat dissipation film to solve the short heating time and low maximum temperature of the graphitization process in the preparation process of artificial graphite heat dissipation film in the prior art , so that the bending resistance and thermal conductivity of the artificial graphite heat dissipation film are poor, the heat dissipation effect of the artificial graphite heat dissipation film is reduced, and it is not convenient for subsequent die-cutting processing and other technical problems. The present invention has the ability to improve the bending resistance of the artificial graphite heat dissipation film Folding performance and thermal conductivity, improve heat dissipation effect, facilitate die-cutting and other advantages

Method used

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  • Graphitization process of artificial graphite heat dissipation film

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Effect test

Embodiment 1

[0026] Embodiment 1 discloses a kind of artificial graphite heat dissipation film graphitization process, comprises the following steps:

[0027] Step 1: Obtain a carbonized film, send the PI film into a carbonization furnace through a boat for carbonization, and obtain a carbonized film;

[0028] Step 2: Install the furnace, send the carbonized film into the graphite furnace through the boat, and then close the furnace door;

[0029] Step 3: evacuate, and evacuate the inner cavity of the graphite furnace to a vacuum state;

[0030] Step 4: Fill inert protective gas, fill inert protective gas into the inner cavity of the graphite furnace after being evacuated, the inert protective gas is argon, the purity of argon is greater than 99.999%, during the filling process, when the air pressure in the graphite furnace When the pressure is 2-4kPa higher than the atmospheric pressure, keep the flow rate of the inert protective gas at 8-12L / min;

[0031] Step 5: First-stage temperatur...

Embodiment 2

[0037] Embodiment 2 discloses a kind of artificial graphite heat dissipation film graphitization process, comprises the following steps:

[0038] Step 1: Obtain a carbonized film, send the PI film into a carbonization furnace through a boat for carbonization, and obtain a carbonized film;

[0039] Step 2: Install the furnace, send the carbonized film into the graphite furnace through the boat, and then close the furnace door;

[0040] Step 3: evacuate, and evacuate the inner cavity of the graphite furnace to a vacuum state;

[0041] Step 4: Fill inert protective gas, fill inert protective gas into the inner cavity of the graphite furnace after being evacuated, the inert protective gas is argon, the purity of argon is greater than 99.999%, during the filling process, when the air pressure in the graphite furnace When the pressure is 2-4kPa higher than the atmospheric pressure, keep the flow rate of the inert protective gas at 8-12L / min;

[0042] Step 5: First-stage temperatur...

Embodiment 3

[0048] Embodiment 3 discloses a kind of artificial graphite heat dissipation film graphitization process, comprises the following steps:

[0049] Step 1: Obtain a carbonized film, send the PI film into a carbonization furnace through a boat for carbonization, and obtain a carbonized film;

[0050] Step 2: Install the furnace, send the carbonized film into the graphite furnace through the boat, and then close the furnace door;

[0051] Step 3: evacuate, and evacuate the inner cavity of the graphite furnace to a vacuum state;

[0052] Step 4: Fill inert protective gas, fill inert protective gas into the inner cavity of the graphite furnace after being evacuated, the inert protective gas is argon, the purity of argon is greater than 99.999%, during the filling process, when the air pressure in the graphite furnace When the pressure is 2-4kPa higher than the atmospheric pressure, keep the flow rate of the inert protective gas at 8-12L / min;

[0053] Step 5: First-stage temperature ...

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Abstract

The invention discloses a graphitization process of an artificial graphite heat dissipation film. The graphitization process comprises the following steps of: 1, obtaining a carbonized film; 2, charging, namely feeding the carbonized film into a graphite furnace through a boat; 3, vacuumizing, namely vacuumizing the inner cavity of the graphite furnace to a vacuum state; 4, filling the graphite furnace with inert protective gas; 5, carrying out first-stage heating to increase the temperature in the graphite furnace from normal temperature to 1150-1250 DEG C; 6, carrying out second-stage heating to increase the temperature in the graphite furnace to 2000-2100 DEG C from 1150-1250 DEG C; 7, carrying out third-stage heating to increase the temperature in the graphite furnace to 3000-3100 DEGC from 2000-2100 DEG C; 8, carrying out heat preservation, namely when the temperature in the inner cavity of the graphite furnace rises to 3000-3100 DEG C, starting heat preservation; and 9, carryingout cooling, specifically, carrying out cooling after heat preservation. Improvement is made in view of the problems of poor bending resistance, poor heat conduction performance and the like of the artificial graphite heat dissipation film in the prior art, and the artificial graphite heat dissipation film has the advantage that the bending resistance and the heat conduction performance are improved.

Description

technical field [0001] The invention relates to the technical field of synthesis and preparation of artificial graphite heat dissipation film, in particular to a graphitization process of artificial graphite heat dissipation film. Background technique [0002] Artificial graphite heat dissipation film is a very thin heat-conducting material, also known as heat-conducting graphite film, heat-conducting graphite sheet, graphite heat sink, etc., which provides the possibility for the thinning development of electronic products. Artificial graphite heat dissipation film has good reworkability, and can be compounded or glued with other film materials such as PET according to the application. This material is elastic, can be cut and punched into any shape, and can be bent multiple times; suitable for point The heat source is converted into a surface heat source for rapid heat conduction, which has high thermal conductivity and is made of a highly oriented graphite polymer film. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/205C09K5/14
CPCC09K5/14C01B32/205
Inventor 朱先磊葛志远王星
Owner 安徽恒炭新材料科技有限公司
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