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Graphite composite radiating fin and preparation method thereof

A technology of composite heat sink and graphite sheet, which is applied in chemical instruments and methods, modification through conduction heat transfer, cooling/ventilation/heating modification, etc. low level problem

Active Publication Date: 2020-10-27
SHENZHEN HANKE NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the development of the electronics industry, the heating problem of electronic equipment has always been a problem that the industry expects to solve. Among them, the use of materials with high thermal conductivity to make heat sinks is one of the solutions, and graphite sheets rely on their excellent thermal conductivity. The conductivity stands out from many materials, but the thermal conductivity of graphite sheet in its longitudinal direction (thickness direction) is low, which restricts the improvement of its thermal conductivity
The way to increase the thickness of the graphite sheet is to glue the multi-layer graphite sheet together to form a heat sink, but this method is still not ideal for improving the thermal conductivity

Method used

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  • Graphite composite radiating fin and preparation method thereof
  • Graphite composite radiating fin and preparation method thereof
  • Graphite composite radiating fin and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0028] Please refer to Figure 1 to Figure 5 , a preparation method of a graphite composite heat sink, comprising the steps of,

[0029] Depositing a metal material on the surface of the graphite sheet 1 to form a metal coating 2;

[0030] Stacking a plurality of graphite sheets 1 with a metal coating 2 to obtain a laminate;

[0031] The laminate was rolled with a heated press roll.

[0032] The principle of the present invention is briefly described as follows: when the hot pressing roller works, the heat is transferred to the metal coating between the adjacent two layers of graphite sheets through the graphite sheet, so that the metal coating is melted, and the graphite sheet is applied with pressure at the same time, and the metal to be melted After the coating is solidified, the adjacent two layers of graphite sheets are fixedly connected together. The raw material of the metal coating is metal, and its thermal conductivity is much higher than that of the adhesive, so t...

Embodiment 1

[0051] Please refer to figure 1 and figure 2 , Embodiment 1 of the present invention is: a graphite composite heat sink, which is not only used for heat dissipation of mobile terminal equipment, such as electronic equipment such as mobile phones and tablet computers, but also for heat dissipation of office equipment such as printers and copiers. Of course, it can also be used For the heat dissipation of other equipment with heat dissipation requirements.

[0052] The preparation method of the graphite composite heat sink is as follows:

[0053] S1. Depositing a metal material with a low melting point and high thermal conductivity on the surface of the graphite sheet 1 by magnetron sputtering to form a metal coating 2. In this embodiment, the metal material with a low melting point and high thermal conductivity is tin;

[0054] S2, stacking a plurality of graphite sheets 1 with a metal coating 2 to obtain a laminate;

[0055] S3. Rolling the laminated body with a hot pressing...

Embodiment 2

[0063] Please refer to figure 1 and figure 2 , the second embodiment of the present invention is: a graphite composite heat sink, which can be used for heat dissipation of mobile terminal equipment, such as electronic equipment such as mobile phones and tablet computers, and can also be used for heat dissipation of office equipment such as printers and copiers. Of course, it can also be used For the heat dissipation of other equipment with heat dissipation requirements.

[0064] The preparation method of the graphite composite heat sink is as follows:

[0065] S1. Depositing a metal material with a low melting point and high thermal conductivity on the surface of the graphite sheet 1 by evaporation to form a metal coating 2. In this embodiment, the metal material with a low melting point and high thermal conductivity is aluminum;

[0066] S2, stacking a plurality of graphite sheets 1 with a metal coating 2 to obtain a laminate;

[0067] S3. Rolling the laminated body with ...

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Abstract

The invention discloses a graphite composite radiating fin and a preparation method thereof. The preparation method of the graphite composite radiating fin comprises the following steps of: depositinga metal material on the surface of a graphite flake to form a metal plating layer; laminating a plurality of graphite flakes with metal plating layers to obtain a laminate; and rolling the laminate with a hot press roller. The graphite composite radiating fin prepared by the preparation method of the graphite composite radiating fin has no adhesive inside, two adjacent layers of graphite flakes are in hot-pressing connection through the low-melting-point metal plating layers on the surfaces of the graphite flakes, thus reaching the purpose of acquiring the thick graphite composite radiating fin, the heat conduction advantage of the graphite composite radiating fin in the horizontal direction can be kept, the longitudinal heat conduction performance of the graphite composite cooling fin can be improved, the heat conduction effect of the graphite composite radiating fin is extremely excellent, and the graphite composite radiating fin is simple in preparation process and low in cost.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a graphite composite heat sink and a preparation method thereof. Background technique [0002] In recent years, with the development of the electronics industry, the heating problem of electronic equipment has always been a problem that the industry expects to solve. Among them, the use of materials with high thermal conductivity to make heat sinks is one of the solutions, and graphite sheets rely on their excellent thermal conductivity. The conductivity stands out from many materials, but the thermal conductivity of graphite sheet in its longitudinal direction (thickness direction) is low, which restricts the improvement of its thermal conductivity. [0003] In order to improve the heat conduction effect, the industry usually adopts the method of increasing the thickness of the graphite sheet to increase the overall heat capacity of the cooling device, so that when ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B7/14B32B37/00B32B37/10B32B37/12B32B37/24B32B38/00H05K7/20
CPCB32B9/007B32B9/04B32B7/14B32B37/1284B32B37/10B32B37/24B32B37/0076B32B38/00H05K7/2039B32B2037/246B32B2307/302
Inventor 王荣福
Owner SHENZHEN HANKE NEW MATERIAL TECH CO LTD
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