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Method for preparing graphite paper with high thermal conductivity

A high thermal conductivity graphite, graphite paper technology, applied in the directions of graphite, graphene, chemical instruments and methods, can solve the problems of large volume, low thermal conductivity, high density, and achieve simple preparation process, high thermal conductivity, and improved performance. Effect

Active Publication Date: 2014-03-12
SHANGHAI LEVSON ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention discloses a preparation method of high thermal conductivity graphite paper, the purpose of which is to overcome the problems of large volume, high density and low thermal conductivity of existing thermal conductive materials such as metal copper, aluminum, etc. and graphite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First, a nickel catalyst layer was prepared on a graphite sheet with a thickness of 1 mm by using a magnetron sputtering system, where the sputtering pressure was 0.3 Pa, the flow rate of argon gas was 5 sccm, and the sputtering jet power was 300 W, and the thickness of the nickel film was 10 nm. The prepared nickel film was subjected to high-temperature annealing treatment using chemical vapor deposition equipment, wherein the flow rate of argon gas was 200 sccm, the flow rate of hydrogen gas was 200 sccm, and the annealing temperature was 950° C. to form nickel single crystal particles with a diameter of 15 μm.

[0019] Then, a graphene film was prepared on a graphite sheet coated with a nickel catalyst layer by chemical vapor deposition, wherein the growth pressure was 20kPa, the hydrogen flow rate was 100sccm, the acetylene flow rate was 20sccm, the growth temperature was 1000°C, and the time was 2hrs.

[0020] Soak the graphite sheet covered with graphene film in fe...

Embodiment 2

[0023] First, a nickel catalyst layer was prepared on a graphite sheet (thickness 0.2mm) by a magnetron sputtering system, where the sputtering pressure was 1Pa, the argon flow rate was 30sccm, the sputtering injection power was 80W, and the thickness of the nickel film was 500nm. The prepared nickel film was subjected to high-temperature annealing treatment using chemical vapor deposition equipment, wherein the flow rate of argon gas was 600 sccm, the flow rate of hydrogen gas was 600 sccm, and the annealing temperature was 750°C to form nickel single crystal particles with a diameter of 0.5 μm.

[0024] Then, a graphene film was prepared on a graphite sheet coated with a nickel catalyst layer by chemical vapor deposition, wherein the growth pressure was 5kPa, the hydrogen flow rate was 200 sccm, the methane flow rate was 70 sccm, the growth temperature was 500° C., and the time was 30 min.

[0025] Soak the graphite sheet covered with graphene film in ferric nitrate aqueous s...

Embodiment 3

[0028] First, a nickel catalyst layer was prepared on a graphite sheet (thickness 0.5mm) by a magnetron sputtering system, where the sputtering pressure was 0.8Pa, the argon flow rate was 15sccm, the sputtering jet power was 120W, and the thickness of the nickel film was 30nm. The prepared nickel film was subjected to high-temperature annealing treatment using chemical vapor deposition equipment, wherein the flow rate of argon gas was 300 sccm, the flow rate of hydrogen gas was 450 sccm, and the annealing temperature was 850° C. to form nickel single crystal particles with a diameter of 10 μm.

[0029] Then, a graphene film was prepared on a graphite sheet coated with a nickel catalyst layer by chemical vapor deposition, wherein the growth pressure was 12kPa, the hydrogen flow rate was 150 sccm, the acetylene flow rate was 50 sccm, the growth temperature was 800°C, and the growth time was 1hr.

[0030] Soak the graphite sheet covered with graphene film in ferric nitrate aqueous...

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Abstract

The invention discloses a method for preparing graphite paper with high thermal conductivity. The method comprises the following steps: firstly preparing a nickel catalyst layer on a graphite sheet with a thickness of 0.2-1 mm by adopting a magnetron sputtering system, wherein the thickness of a nickel film is 10-500 nm; performing high temperature annealing on the prepared nickel catalyst layer to form nickel single crystal particles with diameters of 0.5-15 microns; then, preparing graphene on the graphite sheet plated with the nickel catalyst layer by using a chemical vapor deposition method; soaking the graphite sheet coated with a grapheme film in a catalyst solution ferric nitrate or ferric chloride or iron acetate aqueous solution for 10 minutes to 2 hours, taking out the graphite sheet, drying the graphite sheet at 120 DEG C, and putting the graphite sheet in a chemical vapor deposition system to grow a carbon nanotube; and finally, pressing the graphite sheet through a hydraulic press to obtain the graphite paper with high thermal conductivity. The graphite paper prepared by the method disclosed by the invention not only has high thermal conductivity, but also has excellent mechanical strength and cracking resistance, so that the graphite paper can be produced in a large area and can be widely applied to the field of heat conduction.

Description

technical field [0001] The invention relates to a preparation method of high thermal conductivity graphite paper, which belongs to the technical field of thermal conductivity material preparation. Background technique [0002] At present, many heat dissipation elements are mainly made of metal materials such as copper and aluminum. The thermal conductivity of commonly used graphite materials at room temperature is generally only 70-150W / (m·K). The heat dissipation elements made of these materials have large volume and high density. , Low thermal conductivity and other issues. With the development of integrated circuits, packaging technologies, and electronic systems in the direction of thin, light, small, and portable, the heat dissipation requirements for electronic machines are also increasing. Therefore, it is necessary to explore new thermal conductivity materials with high thermal conductivity, low density, and high temperature resistance. very important. [0003] Car...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y30/00C01B32/162C01B32/186C01B32/21
Inventor 张燕萍赵志国栾华诚贺祖章曹德明
Owner SHANGHAI LEVSON ENTERPRISE GRP
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