CN109767992B - Preparation method of heat dissipation layer of radiator and radiator - Google Patents
Preparation method of heat dissipation layer of radiator and radiator Download PDFInfo
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- CN109767992B CN109767992B CN201910039105.0A CN201910039105A CN109767992B CN 109767992 B CN109767992 B CN 109767992B CN 201910039105 A CN201910039105 A CN 201910039105A CN 109767992 B CN109767992 B CN 109767992B
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Abstract
The invention provides a preparation method of a heat dissipation layer of a radiator and the radiator, wherein the method comprises the following steps: cleaning the surface of the radiator, and placing the cleaned radiator in a vacuum high-temperature box; filling methane into the vacuum high-temperature box, and judging whether the gas in the vacuum high-temperature box meets the heating reaction condition; if yes, heating the vacuum high-temperature box to control methane to be heated and decomposed into carbon and hydrogen; cooling and decompressing the vacuum high-temperature box to control carbon to adsorb the graphene to form a graphene heat dissipation layer, and judging whether the graphene heat dissipation layer meets the carbon adsorption completion condition; if yes, taking out the radiator. According to the invention, due to the adoption of the design of the method for producing the carbon source by heating and decomposing methane, the produced graphene can be effectively and directly bonded with the surface of the radiator, and other materials such as an adhesive and the like are not arranged in the middle, so that the heat of the radiator can be fully transmitted to the graphene radiating layer, and the radiating effect of the radiator is improved.
Description
Technical Field
The invention belongs to the field of radiators, and particularly relates to a preparation method of a radiating layer of a radiator and the radiator.
Background
The existing radiators are made of metal materials into sectional materials, the surface area is increased as much as possible, and the sectional materials are attached to the surface of a heating device, so that the effect of radiating heat generated in the heating process is achieved. With the advent of graphene, many people are gradually paying attention to this new material. The graphene has super heat conduction and electric conduction capabilities. Therefore, the heat dissipation market is concerned, and the heat dissipation problem is expected to be solved by the excellent heat conduction capability of the heat dissipation market.
Therefore, the graphene heat dissipation coating is popular. The method mainly comprises the steps of stirring graphene in a coating, and coating the graphene coating on the surface of a radiator to form a heat dissipation layer, so that the effect of helping the radiator to dissipate heat is achieved. However, the coating has heat-resistant materials such as a binder, so that more graphene cannot achieve the effect of assisting heat dissipation, and the graphene materials capable of playing a heat dissipation effect in the heat dissipation layer are very limited, so that the heat dissipation promotion effect of the heat dissipation layer on the heat sink is poor.
Disclosure of Invention
The embodiment of the invention aims to provide a method for preparing a heat dissipation layer of a radiator and the radiator, and aims to solve the problem that after the heat dissipation layer of the existing radiator is prepared, the heat dissipation effect of the heat dissipation layer on the radiator is poor.
The embodiment of the invention is realized in such a way that the preparation method of the heat dissipation layer of the radiator comprises the following steps:
cleaning the surface of a radiator, and placing the cleaned radiator in a vacuum high-temperature box;
filling methane into the vacuum high-temperature box, and judging whether the gas in the vacuum high-temperature box meets the heating reaction condition;
when the gas in the vacuum high-temperature box is judged to meet the heating reaction conditions, heating the vacuum high-temperature box to control the methane to be heated and decomposed into carbon and hydrogen;
cooling and decompressing the vacuum high-temperature box to control the carbon to adsorb the graphene to form a graphene heat dissipation layer, and judging whether the graphene heat dissipation layer meets the carbon adsorption completion condition;
and when the graphene heat dissipation layer is judged to meet the carbon adsorption completion condition, taking out the radiator.
Further, the step of determining whether the gas in the vacuum high temperature chamber satisfies the heating reaction condition includes:
acquiring the gas concentration of the methane in the vacuum high-temperature box, and judging whether the gas concentration is greater than a first concentration threshold value;
when the gas concentration is judged to be greater than the first concentration threshold value, acquiring the current air pressure in the vacuum high-temperature box, and judging whether the current air pressure is in a preset air pressure range;
and if so, judging that the gas in the vacuum high-temperature box meets the heating reaction conditions.
Further, before the step of cooling and depressurizing the vacuum high-temperature box, the method further includes:
acquiring the carbon concentration of the carbon in the vacuum high-temperature box, and judging whether the carbon concentration is greater than a second concentration threshold value;
if so, sending a trigger instruction, wherein the trigger instruction is used for triggering the cooling and pressure relief operation of the vacuum high-temperature box;
if not, the vacuum high-temperature box is continuously heated.
Further, the step of determining whether the graphene heat dissipation layer satisfies the carbon adsorption completion condition includes:
acquiring a surface image of the radiator, and acquiring pixel data of the surface image;
judging whether the pixel data meet a pixel condition;
and if so, judging that the graphene heat dissipation layer meets the carbon adsorption completion condition.
Further, the step of acquiring pixel data of the surface image comprises:
segmenting the surface image to obtain a plurality of segmented images;
and respectively calculating the current pixel value of each segmented image to obtain the pixel data.
Further, the step of determining whether the pixel data satisfies the pixel condition includes:
judging whether the current pixel value is within a preset pixel range, and setting the segmentation image corresponding to the current pixel value as a marker image when the current pixel value is judged to be within the preset pixel range;
acquiring the current number of the marked images, and judging whether the current number is greater than a number threshold value;
and if so, judging that the pixel data meets the pixel condition.
Furthermore, the step of cooling and decompressing the vacuum high-temperature box comprises:
continuously reducing the heating temperature of the vacuum high-temperature box according to a preset heating interval until the heating is stopped;
and obtaining a standard air pressure value of outside air, controlling the vacuum high-temperature box to continuously release the pressure, and stopping the pressure release operation of the vacuum high-temperature box until the current air pressure value in the vacuum high-temperature box is equal to the standard air pressure value.
Further, after the step of heating the vacuum oven, the method further includes:
and controlling the fan to blow the radiator.
Further, the heating temperature of the vacuum high temperature box is 1000 ℃ or 400 to 700 ℃.
In the embodiment of the invention, because the method for producing the carbon source by heating and decomposing methane is adopted, the produced graphene can be effectively and directly bonded with the surface of the radiator, and other materials such as adhesive and the like are not arranged in the middle, so that the heat of the radiator can be fully transmitted to the graphene heat dissipation layer, the heat dissipation effect of the radiator is effectively improved, in addition, the graphene heat dissipation layer on the surface of the radiator is very compact, the radiator can be effectively prevented from being corroded by other corrosive substances, the service life of the radiator is prolonged, and meanwhile, the graphene heat dissipation layer is very wear-resistant, so that the radiator can be used in places easy to wear, and the practicability of the radiator is improved.
Another object of an embodiment of the present invention is to provide a heat sink, including: the graphene heat dissipation layer is adsorbed on the body.
Drawings
FIG. 1 is a flow chart of a method for preparing a heat dissipation layer of a heat sink according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a method for preparing a heat dissipation layer of a heat sink according to a second embodiment of the present invention;
fig. 3 is a flowchart of a method for manufacturing a heat dissipation layer of a heat sink according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the existing preparation method of the heat dissipation layer of the radiator, as the coating is provided with heat-resistant materials such as a binder and the like, more graphene cannot achieve the effect of assisting heat dissipation, and the graphene materials capable of playing a heat dissipation effect in the heat dissipation layer are very limited, so that the heat dissipation promotion effect of the heat dissipation layer on the radiator is poor.
In order to illustrate the technical solution of the present invention, the following description will be made by using specific examples
Example one
Referring to fig. 1, a flowchart of a method for manufacturing a heat dissipation layer of a heat sink according to a first embodiment of the present invention includes:
step S10, cleaning the surface of the radiator, and placing the cleaned radiator in a vacuum high-temperature box;
in the step, the surface of the radiator is cleaned by an automatic cleaner to improve the cleaning efficiency, and the driving of the radiator in the step is automatically completed by a mechanical arm, a driving program is preset in the automatic arm, and the mechanical arm automatically completes the driving of the radiator after running a corresponding driving program, namely the cleaned radiator is placed in a vacuum high-temperature box;
step S20, filling methane into the vacuum high-temperature box, and judging whether the gas in the vacuum high-temperature box meets the heating reaction condition;
preferably, the gas filled in the step may also be acetylene, ethylene or ethane, in this embodiment, the carbon source is prepared by heating in a separate manner through the design of filling methane or acetylene, so that graphene can be effectively prepared subsequently at the vacuum high temperature, wherein the gas in the vacuum high temperature chamber is subjected to the judgment of the heating reaction condition, so as to judge whether pyrolysis of methane is started, thereby effectively ensuring the decomposition quality of the subsequent carbon source;
when it is judged at step S20 that the gas inside the vacuum hot box satisfies the heating reaction condition, performing step S30;
step S30, heating the vacuum high-temperature box to control the methane to be heated and decomposed into carbon and hydrogen;
the heating temperature of the vacuum high-temperature box is 1000 ℃ or 400-700 ℃, in the embodiment, the graphene is prepared by adopting a CVD method, and the formation of a graphene heat dissipation layer on the radiator is effectively ensured;
step S40, cooling and decompressing the vacuum high-temperature box to control the carbon to adsorb the graphene to form a graphene heat dissipation layer;
the cooling mode in the step can be heating temperature reduction, fan cooling, heating stop or cooling by adopting a heat exchange plate, and the pressure relief of the gas in the vacuum high-temperature box is controlled by opening the pressure relief valve in the step;
step S50, judging whether the graphene heat dissipation layer meets the carbon adsorption completion condition;
judging whether the radiator is completely adsorbed or not by judging the carbon adsorption completion condition of the graphene heat dissipation layer, and further effectively judging the preparation of the graphene heat dissipation layer on the radiator;
when the step S50 determines that the graphene heat dissipation layer does not satisfy the carbon adsorption completion condition, returning to execute step S30;
when the step S50 determines that the graphene heat dissipation layer satisfies the carbon adsorption completion condition, execute step S60;
step S60, taking out the heat sink;
preferably, in this embodiment, the step of taking out the heat sink is also implemented by using a mechanical arm, so as to ensure the working efficiency.
In this embodiment, owing to adopt the method design of heating decomposition methane production carbon source, make the graphite alkene of production can effectually carry out direct bonding with the radiator surface, other materials such as adhesive do not have in the centre, make the heat of radiator can fully be transmitted to on the graphite alkene heat dissipation layer, therefore, the effectual radiating effect who improves the radiator, furthermore, because the graphite alkene heat dissipation layer on radiator surface is very fine and close, can effectively avoid the radiator to be corroded by other corrosive substance, the life of radiator is improved, simultaneously because graphite alkene heat dissipation layer is very wear-resisting, consequently, make the radiator can use in the occasion of easy wearing and tearing, the practicality of radiator has been improved.
Example two
Referring to fig. 2, a flowchart of a method for manufacturing a heat dissipation layer of a heat sink according to a second embodiment of the present invention includes the steps of:
step S11, cleaning the surface of the radiator, and placing the cleaned radiator in a vacuum high-temperature box;
in the step, the surface of the radiator is cleaned by an automatic cleaner to improve the cleaning efficiency, and the driving of the radiator in the step is automatically completed by a mechanical arm, a driving program is preset in the automatic arm, and the mechanical arm automatically completes the driving of the radiator after running a corresponding driving program, namely the cleaned radiator is placed in a vacuum high-temperature box;
step S21, filling methane into the vacuum high-temperature box, and judging whether the gas in the vacuum high-temperature box meets the heating reaction condition;
preferably, the gas filled in the step may also be acetylene, ethylene or ethane, in this embodiment, the carbon source is prepared by heating in a separate manner through the design of filling methane or acetylene, so that graphene can be effectively prepared subsequently at the vacuum high temperature, wherein the gas in the vacuum high temperature chamber is subjected to the judgment of the heating reaction condition, so as to judge whether pyrolysis of methane is started, thereby effectively ensuring the decomposition quality of the subsequent carbon source;
specifically, in this step, the step of determining whether or not the gas in the vacuum high-temperature chamber satisfies the heating reaction condition includes:
acquiring the gas concentration of the methane in the vacuum high-temperature box, and judging whether the gas concentration is greater than a first concentration threshold value;
when the gas concentration is judged to be greater than the first concentration threshold value, acquiring the current air pressure in the vacuum high-temperature box, and judging whether the current air pressure is in a preset air pressure range;
and if so, judging that the gas in the vacuum high-temperature box meets the heating reaction conditions.
When it is judged at step S21 that the gas inside the vacuum hot box satisfies the heating reaction condition, performing step S31;
step S31, heating the vacuum high-temperature box to control the methane to be heated and decomposed into carbon and hydrogen;
the heating temperature of the vacuum high-temperature box is 1000 ℃ or 400-700 ℃, in the embodiment, the graphene is prepared by adopting a CVD method, and the formation of a graphene heat dissipation layer on the radiator is effectively ensured;
step S41, cooling and decompressing the vacuum high-temperature box to control the carbon to adsorb the graphene to form a graphene heat dissipation layer;
the cooling mode in the step can be heating temperature reduction, fan cooling, heating stop or cooling by adopting a heat exchange plate, and the pressure relief of the gas in the vacuum high-temperature box is controlled by opening the pressure relief valve in the step;
step S51, acquiring a surface image of the heat spreader, and acquiring pixel data of the surface image;
in the step, the surface image can be obtained by taking a picture, and the pixel data is effectively obtained by obtaining the surface image, and the pixel data is used for subsequently judging whether the graphene heat dissipation layer is completely adhered to the heat sink, that is, whether the graphene heat dissipation layer is tightly adhered to the surface of the heat sink;
specifically, in this step, the step of acquiring the pixel data of the surface image includes:
segmenting the surface image to obtain a plurality of segmented images;
respectively calculating the current pixel value of each segmented image to obtain the pixel data;
in the embodiment, the surface image is segmented to improve the data analysis base number, so that the problems of low data analysis accuracy and large analysis error caused by a small data analysis base number are solved.
Step S61, determining whether the pixel data satisfies a pixel condition;
specifically, in this step, the step of determining whether the pixel data satisfies the pixel condition includes:
judging whether the current pixel value is within a preset pixel range, and setting the segmentation image corresponding to the current pixel value as a marker image when the current pixel value is judged to be within the preset pixel range;
acquiring the current number of the marked images, and judging whether the current number is greater than a number threshold value;
and if so, judging that the pixel data meets the pixel condition.
When it is determined in step S61 that the pixel data satisfies the pixel condition, performing step S71;
step S71, taking out the heat sink;
preferably, in this embodiment, the step of taking out the heat sink is also implemented by using a mechanical arm, so as to ensure the working efficiency.
In this embodiment, owing to adopt the method design of heating decomposition methane production carbon source, make the graphite alkene of production can effectually carry out direct bonding with the radiator surface, other materials such as adhesive do not have in the centre, make the heat of radiator can fully be transmitted to on the graphite alkene heat dissipation layer, therefore, the effectual radiating effect who improves the radiator, furthermore, because the graphite alkene heat dissipation layer on radiator surface is very fine and close, can effectively avoid the radiator to be corroded by other corrosive substance, the life of radiator is improved, simultaneously because graphite alkene heat dissipation layer is very wear-resisting, consequently, make the radiator can use in the occasion of easy wearing and tearing, the practicality of radiator has been improved.
EXAMPLE III
Referring to fig. 3, a flowchart of a method for manufacturing a heat dissipation layer of a heat sink according to a third embodiment of the present invention includes the steps of:
step S12, cleaning the surface of the radiator, and placing the cleaned radiator in a vacuum high-temperature box;
in the step, the surface of the radiator is cleaned by an automatic cleaner to improve the cleaning efficiency, and the driving of the radiator in the step is automatically completed by a mechanical arm, a driving program is preset in the automatic arm, and the mechanical arm automatically completes the driving of the radiator after running a corresponding driving program, namely the cleaned radiator is placed in a vacuum high-temperature box;
step S22, filling methane into the vacuum high-temperature box, and judging whether the gas in the vacuum high-temperature box meets the heating reaction condition;
preferably, the gas filled in the step may also be acetylene, ethylene or ethane, in this embodiment, the carbon source is prepared by heating in a separate manner through the design of filling methane or acetylene, so that graphene can be effectively prepared subsequently at the vacuum high temperature, wherein the gas in the vacuum high temperature chamber is subjected to the judgment of the heating reaction condition, so as to judge whether pyrolysis of methane is started, thereby effectively ensuring the decomposition quality of the subsequent carbon source;
specifically, in this step, the step of determining whether or not the gas in the vacuum high-temperature chamber satisfies the heating reaction condition includes:
acquiring the gas concentration of the methane in the vacuum high-temperature box, and judging whether the gas concentration is greater than a first concentration threshold value;
when the gas concentration is judged to be greater than the first concentration threshold value, acquiring the current air pressure in the vacuum high-temperature box, and judging whether the current air pressure is in a preset air pressure range;
and if so, judging that the gas in the vacuum high-temperature box meets the heating reaction conditions.
When it is judged at step S22 that the gas inside the vacuum hot box satisfies the heating reaction condition, performing step S32;
step S32, heating the vacuum high-temperature box, and controlling a fan to blow the radiator to control the methane to be heated and decomposed into carbon and hydrogen;
the heating temperature of the vacuum high-temperature box is 1000 ℃ or 400-700 ℃, in the embodiment, the graphene is prepared by adopting a CVD method, and the formation of a graphene heat dissipation layer on the radiator is effectively ensured;
step S42, continuously reducing the heating temperature of the vacuum high-temperature box according to a preset heating interval until the heating is stopped;
step S52, obtaining a standard air pressure value of outside air, controlling the vacuum high-temperature box to continuously release pressure, and stopping the pressure release operation of the vacuum high-temperature box until the current air pressure value in the vacuum high-temperature box is equal to the standard air pressure value so as to control the carbon to adsorb the graphene to form a graphene heat dissipation layer;
specifically, in this step, before the step of cooling and depressurizing the vacuum high-temperature chamber, the method further includes:
acquiring the carbon concentration of the carbon in the vacuum high-temperature box, and judging whether the carbon concentration is greater than a second concentration threshold value;
if so, sending a trigger instruction, wherein the trigger instruction is used for triggering the cooling and pressure relief operation of the vacuum high-temperature box;
if not, the vacuum high-temperature box is continuously heated.
Step S62, acquiring a surface image of the heat spreader, and acquiring pixel data of the surface image;
specifically, in this step, the step of acquiring the pixel data of the surface image includes:
segmenting the surface image to obtain a plurality of segmented images;
respectively calculating the current pixel value of each segmented image to obtain the pixel data;
step S72, determining whether the pixel data satisfies a pixel condition;
specifically, in this step, the step of determining whether the pixel data satisfies the pixel condition includes:
judging whether the current pixel value is within a preset pixel range, and setting the segmentation image corresponding to the current pixel value as a marker image when the current pixel value is judged to be within the preset pixel range;
acquiring the current number of the marked images, and judging whether the current number is greater than a number threshold value;
and if so, judging that the pixel data meets the pixel condition.
When it is determined in step S72 that the pixel data satisfies the pixel condition, performing step S82;
step S82, taking out the heat sink;
preferably, in this embodiment, the step of taking out the heat sink is also implemented by using a mechanical arm, so as to ensure the working efficiency.
In this embodiment, owing to adopt the method design of heating decomposition methane production carbon source, make the graphite alkene of production can effectually carry out direct bonding with the radiator surface, other materials such as adhesive do not have in the centre, make the heat of radiator can fully be transmitted to on the graphite alkene heat dissipation layer, therefore, the effectual radiating effect who improves the radiator, furthermore, because the graphite alkene heat dissipation layer on radiator surface is very fine and close, can effectively avoid the radiator to be corroded by other corrosive substance, the life of radiator is improved, simultaneously because graphite alkene heat dissipation layer is very wear-resisting, consequently, make the radiator can use in the occasion of easy wearing and tearing, the practicality of radiator has been improved.
Example four
The present invention provides a heat sink, comprising: body and graphite alkene heat dissipation layer, graphite alkene heat dissipation layer adsorbs on the body, wherein, because what adopt between body and the graphite alkene heat dissipation layer is direct bonding, other materials such as adhesive do not have in the centre, the heat of body can fully be transmitted to on the graphite alkene heat dissipation layer. And thus more efficient than heat sink coatings. In addition, because the graphite alkene heat dissipation layer on body surface is very compact, can effectively avoid the radiator to be corroded by other corrosive substance. Meanwhile, the graphene heat dissipation layer is very wear-resistant, so that the radiator can be used in places which are easy to wear, specifically, in the embodiment, when the radiator is a heat dissipation device in a refrigerator or an air conditioner, the body is a heat dissipation pipeline, and the graphene heat dissipation layer covers the heat dissipation pipeline, so that the effect of improving the heat dissipation effect of the refrigerator or the air conditioner is correspondingly achieved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A preparation method of a heat dissipation layer of a radiator is characterized by comprising the following steps:
cleaning the surface of a radiator, and placing the cleaned radiator in a vacuum high-temperature box;
filling methane into the vacuum high-temperature box, and judging whether the gas in the vacuum high-temperature box meets the heating reaction condition;
when the gas in the vacuum high-temperature box is judged to meet the heating reaction conditions, heating the vacuum high-temperature box to control the methane to be heated and decomposed into carbon and hydrogen;
continuously reducing the heating temperature of the vacuum high-temperature box according to a preset heating interval until the heating is stopped;
obtaining a standard air pressure value of outside air, controlling the vacuum high-temperature box to continuously release pressure until the current air pressure value in the vacuum high-temperature box is equal to the standard air pressure value, stopping the pressure release operation of the vacuum high-temperature box to control the carbon to adsorb graphene on the surface of the radiator to form a graphene heat dissipation layer, and judging whether the graphene heat dissipation layer meets a carbon adsorption completion condition;
and when the graphene heat dissipation layer is judged to meet the carbon adsorption completion condition, taking out the radiator.
2. The method for preparing a heat dissipation layer of a heat sink of claim 1, wherein the step of determining whether the gas in the vacuum high temperature chamber satisfies the heating reaction condition comprises:
acquiring the gas concentration of the methane in the vacuum high-temperature box, and judging whether the gas concentration is greater than a first concentration threshold value;
when the gas concentration is judged to be greater than the first concentration threshold value, acquiring the current air pressure in the vacuum high-temperature box, and judging whether the current air pressure is in a preset air pressure range;
and if so, judging that the gas in the vacuum high-temperature box meets the heating reaction conditions.
3. The method for preparing a heat dissipation layer of a heat sink of claim 1, wherein before the step of cooling and depressurizing the vacuum high temperature chamber, the method further comprises:
acquiring the carbon concentration of the carbon in the vacuum high-temperature box, and judging whether the carbon concentration is greater than a second concentration threshold value;
if so, sending a trigger instruction, wherein the trigger instruction is used for triggering the cooling and pressure relief operation of the vacuum high-temperature box;
if not, the vacuum high-temperature box is continuously heated.
4. The method for preparing a heat dissipation layer of a heat sink of claim 1, wherein the step of determining whether the graphene heat dissipation layer satisfies a carbon adsorption completion condition comprises:
acquiring a surface image of the radiator, and acquiring pixel data of the surface image;
judging whether the pixel data meet a pixel condition;
and if so, judging that the graphene heat dissipation layer meets the carbon adsorption completion condition.
5. The method of preparing a heat sink layer of a heat spreader of claim 4, wherein the step of obtaining pixel data of the surface image comprises:
segmenting the surface image to obtain a plurality of segmented images;
and respectively calculating the current pixel value of each segmented image to obtain the pixel data.
6. The method for preparing a heat dissipation layer of a heat sink of claim 5, wherein the step of determining whether the pixel data satisfies a pixel condition comprises:
judging whether the current pixel value is within a preset pixel range, and setting the segmentation image corresponding to the current pixel value as a marker image when the current pixel value is judged to be within the preset pixel range;
acquiring the current number of the marked images, and judging whether the current number is greater than a number threshold value;
and if so, judging that the pixel data meets the pixel condition.
7. The method of preparing a heat spreading layer of a heat sink of claim 1, wherein after the step of heating the evacuated high temperature chamber, the method further comprises:
and controlling the fan to blow the radiator.
8. The method for preparing a heat dissipation layer of a heat sink of claim 1, wherein the vacuum chamber is heated to 1000 ℃ or 400 to 700 ℃.
9. A heat sink, comprising: the graphene heat dissipation layer of any one of claims 1 to 8, wherein the graphene heat dissipation layer is adsorbed on the body.
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