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Double-sided bonded high-thermal-conductivity synthetic graphite flake and preparation method thereof

A technology of synthetic graphite and high thermal conductivity, applied in chemical instruments and methods, materials for heat exchange, textiles and papermaking, etc., can solve the problems of general heat dissipation and poor thermal conductivity, and achieve improved thermal conductivity, improved heat dissipation performance, and improved thermal conductivity. The effect of overall thermal conductivity

Active Publication Date: 2021-09-28
SHENZHEN 3KS ELECTRONICS MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The graphite flakes in the prior art are brittle, and have poor thermal conductivity in the longitudinal direction (thickness direction), resulting in relatively general overall heat dissipation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A double-sided bonded high thermal conductivity synthetic graphite sheet comprises the following raw materials in parts by weight: 65 parts of graphite sheet, 20 parts of modified carbon fiber, and 4 parts of thermal conductive glue.

[0022] The preparation method of graphite flakes is as follows: S1: pulverize the carbon black, and remove the iron impurities by passing the pulverized carbon black through a magnetic separator; S2: put the impurity-removed carbon black into a graphitization furnace for graphitization treatment to obtain graphite flakes; the temperature of the graphitization treatment is 2200°C, the pressure is 4MPa, and the time is 5h; the particle size of the pulverized carbon black is 0.1-0.3mm.

[0023] The preparation method of the modified carbon fiber is as follows: 1) The carbon fiber is ultrasonically cleaned with 75wt% ethanol solution for 15 minutes, then rinsed twice with deionized water, and then dried; 2) The dried carbon fiber is placed in ...

Embodiment 2

[0028] A double-sided bonded highly thermally conductive synthetic graphite sheet comprises the following raw materials in parts by weight: 60 parts of graphite sheet, 15 parts of modified carbon fiber, and 3 parts of thermally conductive glue.

[0029] The preparation method of graphite flakes is as follows: S1: pulverize the carbon black, and remove the iron impurities by passing the pulverized carbon black through a magnetic separator; S2: put the impurity-removed carbon black into a graphitization furnace for graphitization treatment to obtain graphite flakes; the temperature of graphitization treatment is 2500°C, the pressure is 3MPa, and the time is 5h; the particle size of the pulverized carbon black is 0.1-0.3mm.

[0030] The preparation method of the modified carbon fiber is as follows: 1) The carbon fiber is ultrasonically cleaned with 75wt% ethanol solution for 15 minutes, then rinsed twice with deionized water, and then dried; 2) The dried carbon fiber is placed in ...

Embodiment 3

[0035] A double-sided bonded high thermal conductivity synthetic graphite sheet comprises the following raw materials in parts by weight: 70 parts of graphite sheet, 20 parts of modified carbon fiber, and 5 parts of thermal conductive glue.

[0036] The preparation method of graphite flakes is as follows: S1: pulverize the carbon black, and remove the iron impurities by passing the pulverized carbon black through a magnetic separator; S2: put the impurity-removed carbon black into a graphitization furnace for graphitization treatment to obtain graphite flakes; the temperature of graphitization treatment is 2500°C, the pressure is 3MPa, and the time is 5h; the particle size of the pulverized carbon black is 0.1-0.3mm.

[0037] The preparation method of the modified carbon fiber is as follows: 1) The carbon fiber is ultrasonically cleaned with 75wt% ethanol solution for 15 minutes, then rinsed twice with deionized water, and then dried; 2) The dried carbon fiber is placed in a va...

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Abstract

The invention relates to the technical field of graphite flakes, in particular to a double-sided bonded high-thermal-conductivity synthetic graphite flake and a preparation method thereof. The double-sided bonded high-thermal-conductivity synthetic graphite flake is prepared from, by weight, 60-70 parts of graphite flakes, 15-25 parts of modified carbon fibers and 3-5 parts of heat-conducting glue. Carbon fiber and copper powder are added, copper is plated on the surface of the carbon fiber by adopting a vacuum evaporation method, so that the thickness of a copper plating layer is 5-7 microns, the modified carbon fiber is formed, the strength of the carbon fiber is improved, meanwhile, the modified carbon fiber and the graphite flake are mixed and pressed into the high-thermal-conductivity graphite flake, the copper powder on the modified carbon fiber is also interspersed among the graphite flakes, and the heat dissipation performance of the copper powder is better, so that the heat conductivity of the high-heat-conductivity graphite flake along the thickness direction is greatly improved, and the overall heat conductivity of the high-heat-conductivity graphite flake is also improved.

Description

technical field [0001] The invention relates to the technical field of graphite sheets, in particular to a double-sided bonded high thermal conductivity synthetic graphite sheet and a preparation method thereof. Background technique [0002] Graphite flake is a brand-new heat conduction and heat dissipation material with unique grain orientation, which conducts heat evenly in two directions, and the lamellar structure can be well adapted to any surface, shielding heat sources and components while improving the performance of consumer electronics products . This new natural graphite solution has high heat dissipation efficiency, small footprint and light weight, and conducts heat evenly in two directions, eliminating "hot spot" areas, shielding heat sources and components while improving the performance of consumer electronics. [0003] The graphite flakes in the prior art are brittle, and the thermal conductivity in the longitudinal direction (thickness direction) is relati...

Claims

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Application Information

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IPC IPC(8): C09K5/14D06M11/83D06M101/40
CPCC09K5/14D06M11/83D06M2101/40
Inventor 薛仁宾李小龙
Owner SHENZHEN 3KS ELECTRONICS MATERIAL CO LTD