KR20170050951A - Porous metal based heat radiating material and method for producing the same - Google Patents
Porous metal based heat radiating material and method for producing the same Download PDFInfo
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- KR20170050951A KR20170050951A KR1020150153129A KR20150153129A KR20170050951A KR 20170050951 A KR20170050951 A KR 20170050951A KR 1020150153129 A KR1020150153129 A KR 1020150153129A KR 20150153129 A KR20150153129 A KR 20150153129A KR 20170050951 A KR20170050951 A KR 20170050951A
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- porous metal
- graphene
- pores
- filling
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20409—Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing
- H05K7/20427—Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing having radiation enhancing surface treatment, e.g. black coating
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
According to the present invention, a porous metal; A graphene layer formed on the surface of the porous metal; And a filling portion filled in the pores of the porous metal.
Description
The present invention relates to a heat dissipation material, and more particularly, to a heat dissipation material based on a porous metal and a manufacturing method thereof.
In general, porous metal is a metal having numerous pores therein, and is classified into an open cell type in which pores are connected to each other and a closed cell type in which pores are not connected to each other but exist independently.
Recently, porous metal has been applied as a heat dissipating material for releasing heat generated from various heat generating elements. Therefore, it is required to develop a technique for improving the efficiency of the porous metal used as the heat radiating member.
Accordingly, an object of the present invention is to provide a porous metal-based heat-radiating material having improved thermal conductivity compared to a conventional porous metal, and a method for manufacturing the same.
According to an aspect of the present invention,
Porous metal; A graphene layer formed on the surface of the porous metal; And a filling portion filled in the pores of the porous metal.
The material of the porous metal may be copper or nickel.
The charging part may be formed by filling the pores of the porous metal with the powder material.
The material of the charger may be any one of copper, aluminum, and ceramics.
The porous metal is preferably an openable porous metal.
According to another aspect of the present invention, in order to achieve the above object of the present invention,
A graphene coating step of coating the surface of the porous metal with graphene; And filling the pores of the porous metal with a powder material.
The graphene coating step may be performed by a CVD method or a plasma method.
According to the present invention, all the objects of the present invention described above can be achieved. Specifically, graphene having excellent thermal conductivity is coated on the porous metal, and porosity of the porous metal is filled with metal powder, iron and ceramics having excellent thermal conductivity such as copper or aluminum, A heat dissipation material is provided.
1 is a flowchart illustrating a method of manufacturing a porous metal-based heat dissipation material according to an embodiment of the present invention.
FIG. 2 is a graph showing the thermal diffusivity of a porous metal-based heat-radiating material according to the present invention in comparison with a comparative example.
A porous metal-based heat dissipation material according to an embodiment of the present invention includes a porous metal, a graphene layer coated on the surface of the porous metal, and a filling portion filled in pores formed in the porous metal.
The porous metal is formed of a common porous metal having a plurality of pores formed therein. In the present invention, an openable porous metal having pores connected to each other is used. The material of the porous metal is preferably copper, aluminum or nickel which is excellent in thermal conductivity and capable of graphene coating.
The graphene layer is formed by coating the surface of the porous metal with graphene. The graphene layer is formed by the CVD method or the plasma method, thereby greatly improving the thermal conductivity.
The live part is formed by filling the pores of the porous metal with the powder material. The live part is preferably formed by filling iron and iron alloy, aluminum, copper, or ceramic powder, and may be made of the same material as the porous metal or different materials. The heat is preferentially discharged along with the material having excellent thermal conductivity, and the larger the specific surface area, the better the heat radiation effect is. However, when the porous metal itself is used as a heat-dissipating material, the heat release effect may be limited due to the air in the pores. Therefore, if the metal having excellent thermal conductivity is filled in the pores, the heat conduction effect can be greatly improved. Further, graphene having a very high thermal conductivity may be coated on the surface of the porous metal by CVD or plasma method.
FIG. 1 is a flowchart illustrating a manufacturing method of a porous metal-based heat dissipation material according to an embodiment of the present invention. Referring to FIG. 1, a method of manufacturing a porous metal-based heat-radiating material according to an embodiment of the present invention includes a porous metal preparation step, a graphene coating step of coating a surface of a porous metal prepared through a porous metal preparation step with graphene And a filling step of filling the pores formed in the porous metal with the powder material after the graphen coating step.
In the preparation of the porous metal, a porous metal of copper, aluminum or nickel having a high thermal conductivity is prepared. The porous metal can be produced by a conventional method. An example of producing foam aluminum is as follows. A melting step of melting the aluminum ingot, a thickening step of giving an appropriate viscosity so that the molten aluminum molten metal can maintain its bubble shape, the stirring and mixing step of uniformly dispersing the foaming agent in the aluminum molten metal, and the foaming step of foaming Whereby foamed aluminum is produced. A graphene coating step is performed on the porous metal prepared through the porous metal preparation step.
In the graphen coating step, the surface of the porous metal prepared through the porous metal preparation step is coated with graphene. In the present embodiment, a CVD method or a plasma method is used for the graphen coating step.
In the case of the CVD method, the graphene coating step can be carried out by growing graphene by CVD using a porous metal as a catalyst at normal pressure and vacuum.
In the case of the plasma process, a plasma gas may be passed through H 2 O or an organic compound to bond the functional group to the surface of the porous metal, and the functional group-bonded porous metal may be supplied with graphene in powder form to coat the functional group .
After the graphene coating step, a graphene layer is formed on the surface of the porous metal, and the filling step is performed after the graphene coating step is completed.
In the filling step, the powder material is filled in the pores of the porous metal formed with the graphene layer prepared through the graphene coating step. The powder material used in the filling step may be the same as the porous metal or other materials may be used, which can be selected only for the product to be used. The powder material filled in the pores of the porous metal is solidified through sintering and integrated with the porous metal.
FIG. 2 is a graph showing an improved thermal diffusion effect of a porous metal-based heat dissipation material according to an embodiment of the present invention. As can be seen from FIG. 2, the thermal diffusivity of the same metal powder sintered body + copper porous material is improved as compared with the metal powder sintered body.
Although the present invention has been described with reference to the above embodiments, the present invention is not limited thereto. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
A graphene layer formed on the surface of the porous metal; And
And a filling portion filled in the pores of the porous metal.
Wherein the material of the porous metal is copper or nickel.
Wherein the filling portion is formed by filling powdered material in pores of the porous metal.
Wherein the filling part is made of copper, aluminum, or ceramic.
Wherein the porous metal is an openable porous metal.
And filling the pores of the porous metal with a powder material.
Wherein the graphen coating step is performed by a CVD method or a plasma method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150153129A KR20170050951A (en) | 2015-11-02 | 2015-11-02 | Porous metal based heat radiating material and method for producing the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150153129A KR20170050951A (en) | 2015-11-02 | 2015-11-02 | Porous metal based heat radiating material and method for producing the same |
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| Publication Number | Publication Date |
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| KR20170050951A true KR20170050951A (en) | 2017-05-11 |
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| KR1020150153129A KR20170050951A (en) | 2015-11-02 | 2015-11-02 | Porous metal based heat radiating material and method for producing the same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200009613A (en) * | 2018-07-19 | 2020-01-30 | 한국과학기술원 | Fabrication of flexible material for efficient heat dissipation of chip and cooling method thereof |
| KR20210103032A (en) * | 2020-02-12 | 2021-08-23 | 전남대학교산학협력단 | 3-dimensional graphene-metal composite and manufacturing method of the same |
| KR20220046715A (en) * | 2020-10-07 | 2022-04-15 | 전남대학교산학협력단 | Metal-carbon composite structure and high thermal conductivity heat-dissipating material including the same |
-
2015
- 2015-11-02 KR KR1020150153129A patent/KR20170050951A/en active Search and Examination
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200009613A (en) * | 2018-07-19 | 2020-01-30 | 한국과학기술원 | Fabrication of flexible material for efficient heat dissipation of chip and cooling method thereof |
| KR20210103032A (en) * | 2020-02-12 | 2021-08-23 | 전남대학교산학협력단 | 3-dimensional graphene-metal composite and manufacturing method of the same |
| KR20220046715A (en) * | 2020-10-07 | 2022-04-15 | 전남대학교산학협력단 | Metal-carbon composite structure and high thermal conductivity heat-dissipating material including the same |
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