CN221187705U - Graphite flake with good heat dissipation performance - Google Patents
Graphite flake with good heat dissipation performance Download PDFInfo
- Publication number
- CN221187705U CN221187705U CN202322383490.5U CN202322383490U CN221187705U CN 221187705 U CN221187705 U CN 221187705U CN 202322383490 U CN202322383490 U CN 202322383490U CN 221187705 U CN221187705 U CN 221187705U
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- CN
- China
- Prior art keywords
- coating
- graphite
- heat dissipation
- good heat
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 57
- 239000010439 graphite Substances 0.000 title claims abstract description 57
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 19
- 239000011248 coating agent Substances 0.000 claims abstract description 75
- 238000000576 coating method Methods 0.000 claims abstract description 75
- 239000000463 material Substances 0.000 claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 11
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 8
- 238000005229 chemical vapour deposition Methods 0.000 claims abstract description 7
- 229920006267 polyester film Polymers 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 abstract description 16
- 230000003647 oxidation Effects 0.000 abstract description 8
- 238000007254 oxidation reaction Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000002253 acid Substances 0.000 abstract description 5
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- 239000000843 powder Substances 0.000 abstract description 4
- 150000001447 alkali salts Chemical class 0.000 abstract description 3
- 239000002585 base Substances 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Laminated Bodies (AREA)
Abstract
The utility model discloses a graphite flake with good heat dissipation, which relates to the technical field of graphite flakes and comprises the following components: the graphite comprises a graphite substrate, a first coating, a second coating and a protective film, wherein the first coating is coated on two sides of the graphite substrate, the second coating is coated on the side surface of the first coating, and the protective film is adhered on the side surface of the second coating; the first coating is a silicon carbide coating, and the thickness of the first coating is 0.01-0.03mm; the protection film is made of a Pet material, and the protection film made of the Pet material takes a polyester film as a base material. The graphite plate with good heat dissipation performance has the characteristics of high temperature resistance, oxidation resistance, high purity, acid and alkali salt resistance, organic reagent resistance and the like through the first coating after the silicon carbide coating is deposited by chemical vapor deposition, and meets the requirements of a high-purity monocrystal growth environment, so that the problem that a graphite substrate is corroded to remove powder can be solved, a compact-structure second coating is prepared on the graphite substrate, and oxygen in the environment can be effectively prevented from diffusing to the surface of the graphite substrate in the use process through the second coating.
Description
Technical Field
The utility model relates to the technical field of graphite sheets, in particular to a graphite sheet with good heat dissipation.
Background
The graphite flake is a brand new heat conduction and dissipation material, has unique grain orientation, uniformly conducts heat along two directions, and has a lamellar structure which can be well adapted to any surface, shield heat sources and components and improve the performance of consumer electronic products. The brand new natural graphite solution has high heat dissipation efficiency, small occupied space and light weight, uniformly conducts heat along two directions, eliminates a hot spot area, shields a heat source and a component, improves the performance of consumer electronic products, and has good heat dissipation performance but also has the defects;
Such as application number: CN201220224050.4 the utility model discloses a graphite flake, a single large-size graphite flake can meet the heat dissipation and conduction requirements of general large-size products, so that the graphite flake is completed by a whole flake without splicing, and the heat dissipation and conduction effects are more remarkable; the large-size graphite sheets can be cut out to more small-size graphite sheets, and a scheme with the least residual materials can be designed more reasonably, so that the production cost is saved, and unnecessary loss and waste are reduced; although the scheme of the graphite flake with the least residual materials is designed, the production cost is saved, unnecessary loss and wave are reduced, but the graphite flake can be corroded to remove powder under the high-temperature and corrosive gas environment, so that powder impurities are introduced into the monocrystalline material, and therefore, the application of a high-purity, uniform and compact protective coating is the only method for solving the problem;
In view of the above, studies and improvements have been made on the conventional structure and defects, and a graphite sheet having excellent heat dissipation has been proposed.
Disclosure of utility model
The utility model aims to provide a graphite sheet with good heat dissipation performance so as to solve the problems in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a graphite sheet having excellent heat dissipation properties, comprising: the graphite plate comprises a graphite substrate, a first coating, a second coating and a protective film, wherein the first coating is coated on two sides of the graphite substrate, the second coating is coated on the side surface of the first coating, the protective film is adhered on the side surface of the second coating, the first coating is a silicon carbide coating, the thickness of the first coating is 0.01-0.03mm, the first coating is high in purity, uniform, compact, fine in particles and free of defects, the first coating has electromagnetic conductivity, the first coating adopts a chemical vapor deposition technology, and a graphite plate after the first coating is coated with the silicon carbide coating through chemical vapor deposition has the characteristics of high temperature resistance, oxidation resistance, high purity, acid and alkali resistance, organic reagent resistance and the like.
Furthermore, the second coating is an oxide coating, and oxygen in the environment can be effectively prevented from diffusing to the surface of the graphite matrix in the using process through the second coating.
Further, the thickness of the second coating is 0.03-0.08mm, and the second coating has good wear resistance, corrosion resistance, thermal shock resistance and high-temperature oxidation resistance.
Furthermore, the protection film is made of the Pet material, and the protection film made of the Pet material takes the polyester film as a base material, so that the protection film is easy to attach and peel, the efficiency of automatic assembly can be improved, and the reject ratio is reduced.
Compared with the prior art, the utility model has the beneficial effects that:
1. According to the utility model, the graphite disc after the first coating is subjected to chemical vapor deposition of the silicon carbide coating has the characteristics of high temperature resistance, oxidation resistance, high purity, acid and alkali salt resistance, organic reagent and the like, and the requirements of a high-purity monocrystal growth environment are met, so that the problem of powder falling caused by corrosion of a graphite substrate can be solved, a compact-structure second coating is prepared on the graphite substrate, oxygen in the environment can be effectively prevented from diffusing to the surface of the graphite substrate in the using process through the second coating, the second coating has the advantages of wear resistance, corrosion resistance, good thermal shock resistance and high-temperature oxidation resistance, and the protective film is finally applied to the process of each section of the graphite substrate and the transportation process to avoid scratch, so that the protective effect is achieved;
2. The special adhesive for the carburant can lead the graphite matrix to have stable cohesiveness, is nontoxic and harmless, is generated by high molecular polymerization reaction, is bonded together through physical action after the carburant contacts, can not generate chemical reaction, and leads the hardness of the carburant after being molded to be enhanced, thereby improving the hardness of the graphite matrix.
Drawings
FIG. 1 is a schematic diagram of a front view structure of the present utility model;
FIG. 2 is a schematic side view of the present utility model;
FIG. 3 is a schematic diagram of the graphite matrix structure of the present utility model;
FIG. 4 is a schematic diagram of the steps of the present utility model.
In the figure: 1. a graphite matrix; 2. a first coating; 3. a second coating; 4. and a protective film.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 to 3, a graphite sheet having excellent heat dissipation properties, comprising: the graphite substrate 1, the first coating 2, the second coating 3 and the protective film 4, wherein the first coating 2 is coated on two sides of the graphite substrate 1, the second coating 3 is coated on the side surface of the first coating 2, and the protective film 4 is adhered on the side surface of the second coating 3.
As shown in fig. 1-2, the first coating 2 is a silicon carbide coating, and the thickness of the first coating 2 is 0.01-0.03mm; the first coating 2 has electromagnetic conductivity, and the first coating 2 adopts chemical vapor deposition technology. The second coating 3 is an oxide coating; the thickness of the second coating layer 3 is 0.03-0.08mm; the protective film 4 is made of Pet material, and the protective film 4 made of Pet material uses a polyester film as a base material.
As shown in fig. 4, the method comprises the following steps: step one: adding 1% -1.5% of special adhesive for carburant into graphite powder; step two: adding water by about 9%, and uniformly stirring graphite powder and a special adhesive for the carburant; step three: and (3) cooling and molding the product obtained in the step two. According to the colloid property of the special adhesive for the carburant in the step one: the adhesive has strong binding power when dissolved in water to form glue, and the special adhesive for carburant can form a net structure in the material rapidly, the forming strength can reach more than 100kg, and the high temperature is resistant to 1200 ℃.
Working principle: when the graphite flake with good heat dissipation is used, firstly, the graphite disk coated by the first coating 2 through the chemical vapor deposition of the silicon carbide has the characteristics of high temperature resistance, oxidation resistance, high purity, acid and alkali salt resistance, organic reagent and the like, meets the requirement of a high-purity monocrystal growth environment, and has good oxidation resistance when the temperature resistance of the first coating 2 is up to 1600 ℃; the first coating layer 2 has high purity, uniformity, compactness, fine particles and no defects; the first coating 2 is resistant to scouring; first coating 2 corrosion resistance: acid, alkali, salt and organic reagent resistance; the second coating 3 with compact structure is prepared on the graphite substrate 1, oxygen in the environment can be effectively prevented from diffusing to the surface of the graphite substrate 1 in the using process through the second coating 3, titanium dioxide in the second coating 3 has high melting point and good thermal stability, the titanium dioxide is added into the hard alloy sintering coating, the titanium dioxide is converted at the sintering temperature, a compact film layer is formed on the surface of the graphite, the product is effectively blocked from contacting with the graphite, the sintering quality is improved, zirconium dioxide in the second coating 3 has good wear resistance, corrosion resistance, thermal shock resistance and high-temperature oxidation resistance, and finally the protective film 4 is applied to the 1-stage process and the transportation process of the graphite substrate to avoid scratch, so that the protective effect is achieved; in the preparation process of the graphite matrix 1, 1 to 1.5 percent of special adhesive for carburant is added into the graphite powder; then adding water by about 9%, uniformly stirring graphite powder and a special adhesive for a carburant, and then cooling and forming, wherein the hardness of the obtained graphite matrix 1 is enhanced, which is the working principle of the graphite sheet with good heat dissipation.
The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (4)
1. A graphite sheet having excellent heat dissipation properties, comprising: graphite base member (1), first coating (2), second coating (3) and protection film (4), its characterized in that, graphite base member (1) both sides are scribbled first coating (2), first coating (2) lateral surface scribbles second coating (3), second coating (3) lateral surface bonding has protection film (4), first coating (2) are the carborundum coating, and the thickness of first coating (2) is 0.01-0.03mm, first coating (2) have electromagnetic conductivity, and first coating (2) adopt chemical vapor deposition technique.
2. A graphite sheet with good heat dissipation according to claim 1, characterized in that the second coating (3) is an oxide coating.
3. A graphite sheet with good heat dissipation according to claim 1, characterized in that the thickness of the second coating (3) is 0.03-0.08mm.
4. The graphite flake with good heat dissipation performance according to claim 1, wherein the protective film (4) is made of a Pet material, and the protective film (4) made of a Pet material uses a polyester film as a base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322383490.5U CN221187705U (en) | 2023-09-04 | 2023-09-04 | Graphite flake with good heat dissipation performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322383490.5U CN221187705U (en) | 2023-09-04 | 2023-09-04 | Graphite flake with good heat dissipation performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221187705U true CN221187705U (en) | 2024-06-21 |
Family
ID=91515145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322383490.5U Active CN221187705U (en) | 2023-09-04 | 2023-09-04 | Graphite flake with good heat dissipation performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221187705U (en) |
-
2023
- 2023-09-04 CN CN202322383490.5U patent/CN221187705U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |