CN113308160A - Efficient heat dissipation coating for surface of aluminum alloy radiator and preparation method thereof - Google Patents
Efficient heat dissipation coating for surface of aluminum alloy radiator and preparation method thereof Download PDFInfo
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Abstract
The invention provides a high-efficiency heat dissipation coating for the surface of an aluminum alloy radiator and a preparation method thereof, wherein the coating comprises the following raw materials: radiation cooling the nanocomposite; the radiation cooling nano composite material consists of graphene and h-BN, and the radiation cooling nano composite material obtains a radiation cooling function. The radiation cooling coating has a dual-function coating with high infrared emissivity and thermal conductivity, greatly enhances radiation cooling, realizes technical integration of three heat transfer modes of radiation, convection and conduction, and solves the problems that graphene is easy to agglomerate and radiation cooling efficiency is low and the like in the existing pure graphene coating. The prepared radiation cooling coating has the characteristics of uniform dispersion, excellent mechanical property, excellent heat dissipation and cooling performance and the like. The heat dissipation and cooling requirements of the high-power module in the fields of aerospace, rail transit, smart power grids, new energy and the like can be met.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to an efficient heat dissipation coating for the surface of an aluminum alloy radiator and a preparation method thereof.
Background
The high-power aluminum alloy radiator is widely applied to the fields of rail transit, smart power grids, new energy and the like. As power electronic modules continue to increase in power density, the requirements for their thermal management are becoming more stringent. Taking the power module for high-speed rail as an example, the heat exchange efficiency of the radiator is greatly improved on the premise of not increasing the volume and energy consumption of the radiator when the power density of the power module reaches 100-150W/cm 2. According to the theoretical analysis of steady-state heat flow, the passive radiative heat exchange between the fins and the external space is obviously strengthened, and the key point is to reduce the total thermal resistance in the heat transfer process from the aluminum alloy radiator to the environment, including conduction thermal resistance and radiation thermal resistance.
The existing heat dissipation coating generally adopts pure graphene powder as a radiation cooling filler, and since graphene is a material having an infrared emissivity close to a theoretical blackbody (epsilon ═ 1) in a full waveband, for example, patent CN108003725A adopts graphene slurry as the radiation cooling filler, and the graphene slurry is compounded with epoxy resin and acrylic resin to prepare the radiation cooling coating, but the graphene is easily agglomerated in a mode of simply adopting the graphene slurry as the filler, so that the radiation cooling efficiency is rapidly attenuated. In addition, the existing radiation cooling coating also has the defects that the thermal conductivity of the coating is reduced due to the agglomeration of graphene, so that the thermal resistance of the coating in service is increased, and the radiation cooling efficiency is influenced.
The problems of complex preparation procedure, long preparation period, uneven dispersion and difficulty in large-scale preparation in the prior art are solved, and the cooling efficiency of the radiator is improved. The dual-functional coating with high infrared emissivity and thermal conductivity needs to be designed and constructed, radiation cooling is greatly enhanced, and technical integration of three heat transfer modes of radiation, convection and conduction is realized, so that the requirement of thermal management of a high-power electronic module is met.
Disclosure of Invention
In order to solve the technical problems of the background art, the invention provides a high-efficiency heat dissipation coating for the surface of an aluminum alloy radiator and a preparation method thereof, wherein the radiation cooling coating has a dual-function coating with high infrared emissivity and heat conductivity, greatly enhances radiation cooling, realizes technical integration of three heat transfer modes of radiation, convection and conduction, and overcomes the problems of easy agglomeration of graphene and low radiation cooling efficiency of the existing pure graphene coating.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-efficiency heat dissipation coating for the surface of an aluminum alloy radiator, which comprises the following raw materials: radiation cooling the nanocomposite; the radiation cooling nano composite material consists of graphene and h-BN, and the radiation cooling nano composite material obtains a radiation cooling function.
Further, the radiation cooling nano composite material is obtained by mechanically ball-milling the following raw materials in parts by weight at a speed of 300-600 rpm for 12-48 hours in a vacuum or inert gas protection state:
100 parts of graphite materials;
20-150 parts of h-BN.
Further, the graphite material is a highly oriented graphite material, and is selected from one of crystalline flake graphite, high-purity graphite block, highly oriented pyrolytic graphite and expanded graphite.
Furthermore, the h-BN is one of nano-flake, rod and sphere, and the size of the h-BN is 100 nm-1 mu m.
Further, the preparation method of the coating comprises the following steps:
placing raw materials of graphite materials and h-BN into a sealing tank, keeping a vacuum or inert gas state in the sealing tank, and carrying out ball milling for 12-48 h, wherein the weight ratio of ball milling materials to balls is 1: 20, the ball milling speed is 300-600 rpm, the ball diameter is 4-8 mm, and the volume of the sealed tank is 0.1-2L.
Further, the raw materials of the coating also comprise: organic resin, curing agent, anti-settling agent and solvent; the radiation cooling nano composite material and the radiation cooling nano composite material form the raw materials of the radiation cooling coating according to the following parts:
further, the organic resin is selected from one of epoxy resin, organic silicon resin and acrylic resin; the curing agent is selected from one of polyamide, phenolic amine, polyether amine and isocyanate; the anti-settling agent is selected from one or more of organic bentonite, amide wax and hydrogenated castor oil; the solvent is one or more selected from xylene, n-butanol, acetone and cyclohexanone.
The preparation method of the high-efficiency heat dissipation coating for the surface of the aluminum alloy radiator comprises the following steps:
1) weighing the radiation-cooled nano composite material, and putting the nano composite material, the binder, the solvent and the anti-settling agent into a container for high-speed dispersion for 20 min-1 h to obtain a component A;
2) uniformly dispersing the component A and the curing agent of the component B at a high speed for 5-10 min to obtain slurry;
3) and uniformly coating the slurry on the surface of the metal radiating fin by a spraying or dip-coating method, and curing for 10-48 hours at the temperature of 25-35 ℃ to finally obtain the radiation cooling coating of the IGBT power module.
Further, in the steps 1) and 2), a planetary gravity mixer is used in the process of stirring and dispersing the slurry at a high speed, a polytetrafluoroethylene tank body and zirconia balls are arranged for stirring and dispersing, the stirring speed is 600-1500 rpm, and the diameter of the zirconia balls is 4-10 mm.
Compared with the prior art, the invention has the beneficial effects that:
1) the radiation cooling coating has a dual-function coating with high infrared emissivity and thermal conductivity, greatly enhances radiation cooling, realizes technical integration of three heat transfer modes of radiation, convection and conduction, and solves the problems of easy agglomeration of graphene and low radiation cooling efficiency and the like existing in the conventional pure graphene coating;
2) according to the invention, a ball-milling stripping process is adopted to strip the high-orientation graphite and the h-BN powder into the graphene and the h-BN nanosheets respectively, and the graphene and the h-BN nanosheets are compounded and uniformly dispersed, so that the prepared graphene and h-BN nanosheet composite powder has double functions of high radiance and heat conductivity, and can be added into a coating to enable the aluminum fins of the power module to dissipate heat and cool to the maximum extent, and the heat dissipation and cooling performance can be remarkably improved. In addition, the mutual dispersion of the graphene and the h-BN material can overcome the problems of agglomeration, uniform dispersion and the like of the traditional pure graphene material in resin.
3) The radiation cooling coating prepared by the invention has the characteristics of uniform dispersion, excellent mechanical property, excellent heat dissipation and cooling performance and the like. The heat dissipation and cooling requirements of the high-power module in the fields of aerospace, rail transit, smart power grids, new energy and the like can be met.
Drawings
FIG. 1 is a diagram of in-situ compounding of graphene/h-BN nanosheets achieved by ball-milling and shearing according to the present invention.
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings.
A high-efficiency heat dissipation coating for the surface of an aluminum alloy radiator, which comprises the following raw materials: radiation cooling the nanocomposite; the radiation cooling nano composite material consists of graphene and h-BN, and the radiation cooling nano composite material obtains a radiation cooling function.
The radiation cooling nano composite material is prepared by placing the following raw materials in parts by weight in a polytetrafluoroethylene lining sealing tank, carrying out ball milling for 12-48 h in the sealing tank under a vacuum or inert gas state, wherein the weight ratio of ball milling materials to balls is 1: 20, the ball milling speed is 300-600 rpm, the diameter of zirconia balls is 4-8 mm, and the volume of a sealed tank is 0.1-2L:
100 parts of graphite materials;
20-150 parts of h-BN.
FIG. 1 is a diagram of in-situ compounding of graphene/h-BN nanosheets achieved through ball milling and shearing.
Preferably, the graphite material is selected from one of crystalline flake graphite, high-purity graphite block and expanded graphite.
Preferably, the h-BN is selected from the group consisting of nano-platelets and has a size of 100nm to 1 μm.
More preferably, the graphene material of the radiation cooling nanocomposite material is flake graphite; the h-BN raw material is selected from h-BN nanosheets with the size of 200 nm. This preference is for further analysis of the physical and chemical interactions between the raw materials that occur during ball milling and the composition of the radiation cooled nanocomposites after ball milling. The flake graphite is a preferable raw material for preparing the graphene by a ball milling method, and compared with h-BN with other shapes, the h-BN nanosheet has higher thermal conductivity along the in-plane direction, improves the thermal conductivity of the polymer-based composite material under the condition of low filling rate and has high heat dissipation efficiency.
The heat dissipation mechanism of the radiation cooling nano composite material is as follows: the graphite material and the h-BN are mutually stripped in the ball milling process, the thickness of the sheet layer is gradually reduced, the dispersion is very uniform, and the synergistic effect of high infrared radiation of graphene and high thermal conductivity of the h-BN is beneficial to greatly improving the heat dissipation performance of the radiation cooling nano composite material. On one hand, the graphene has the characteristics of quantized lattice vibration and discrete energy level, the excited graphene is transited from a high-energy excited state to low energy, energy release is completed in an infrared radiation mode, and radiation cooling is realized; on the other hand, the high thermal conductivity of h-BN helps graphene to complete energy release better, and the heat dissipation and cooling rate is greatly improved.
A high-efficiency heat dissipation coating for the surface of an aluminum alloy radiator is composed of the following raw materials in parts by weight:
the preferable raw material composition can obtain the coating material with uniform dispersion, excellent mechanical property, heat resistance and radiation cooling property.
Preferably, the organic resin is one of epoxy resin and acrylic resin, and the preferable organic resin is easy to obtain, low in cost and easy to mix uniformly, so that an ideal coating material is obtained.
Preferably, the curing agent is one of polyamide, phenolic amine, polyether amine and isocyanate, and the curing agent can improve the curing degree of the coating material and shorten the time required for forming.
Preferably, the anti-settling agent is one or two of organic bentonite and amide wax, and the anti-settling agent can improve the low-shear viscosity of the coating, reduce the yield value and prevent the filler from settling.
Preferably, the solvent is one or two of xylene, n-butanol, acetone and cyclohexanone, and the preferred polar solvent is selected to facilitate better dispersion of the monomers and the auxiliary agent.
The invention also provides a preparation method of the high-efficiency heat dissipation coating for the surface of the aluminum alloy radiator.
The preparation method of the high-efficiency heat dissipation coating for the surface of the aluminum alloy radiator comprises the following steps:
1) weighing the radiation-cooled nano composite material, and putting the nano composite material, the binder, the solvent and the anti-settling agent into a container for high-speed dispersion for 20-40 min to be uniformly mixed to obtain a component A;
2) uniformly dispersing the component A and the curing agent of the component B at a high speed for 5-10 min to obtain slurry;
3) and uniformly coating the slurry on the surface of the metal radiating fin by a spraying or dip-coating method, and curing for 10-30 h at the temperature of 25-35 ℃ to finally obtain the radiation cooling coating of the IGBT power module.
The preparation mechanism of the invention is as follows: uniformly dispersing the organic resin-removed nano composite material and the anti-settling agent in a solvent to obtain a uniform suspension; and (3) quickly adding a curing agent into the suspension, uniformly stirring at a high speed, uniformly coating the finally obtained slurry on the surface of the metal radiating fin by a spraying or dip-coating method, and finally curing to finally obtain the radiation cooling coating of the power module.
The radiation cooling nano composite material used by the product is a high-efficiency heat dissipation cooling composite material prepared from graphite and h-BN. Flake graphite (325 meshes, and the purity is more than 99.5%) is selected as graphite; h-BN selective nanosheet (200nm, purity more than 99.5%); the organic resin is epoxy resin; the curing agent is isocyanate; the anti-settling agent is organic bentonite; selecting the volume ratio of n-butyl alcohol to cyclohexanone as a solvent, namely 1: 1; the ball milling speed used in the preparation process of the radiation cooling nano composite material is 500rpm, the volume of the tank body is 0.5L, and the diameter of the zirconia ball is 6 mm; the ball milling speed used in the preparation process of the radiation cooling coating slurry is 1200 rpm; the volume of the tank body is 0.5L, the diameter of the zirconia ball is 6mm, and the curing temperature of the coating is 25 ℃ at room temperature.
Example 1:
(1) the weight ratio of graphite to h-BN nano sheet is 5: 1 preparing radiation cooling nano composite material, the specific preparation process is as follows:
putting 41.67g of scaly graphite, 8.33g h-BN nano sheet and 1000g of zirconia balls with the diameter of 6mm into a 0.5L steel sealed tank, vacuumizing the sealed tank, and performing ball milling for 48 hours at the ball milling speed of 500rpm to obtain black powder, namely the radiation cooling nano composite material;
(2) mixing 100 parts of radiation cooling nano composite material, 100 parts of acrylic resin, 1.5 parts of anti-settling agent organic bentonite and 15 parts of n-butyl alcohol and cyclohexanone with the solvent volume ratio of 1:1 at 1200rpm for 25min to obtain a component A;
(3) adding 5 parts of curing agent isocyanate of the component B into the component A, and then mixing at a high speed of 1200rpm for 5min to obtain heat dissipation coating slurry;
(4) and uniformly coating the slurry on the surface of the metal radiating fin of the IGBT power module by a spraying method, and curing for 24 hours at the temperature of 25 ℃ to obtain the radiation cooling coating of the power module.
(5) And testing the thickness, the balance temperature, the cooling amplitude and the thermal radiation coefficient of the prepared radiation cooling coating of the IGBT power module. The results are shown in Table 1.
Example 2:
(1) the weight ratio of graphite to h-BN nano sheet is 3: 1 preparing radiation cooling nano composite material, the specific preparation process is as follows:
putting 37.5g of scaly graphite, 12.5g h-BN nano sheets and 1000g of zirconia balls with the diameter of 6mm into a 0.5L steel sealed tank, vacuumizing the sealed tank, and performing ball milling for 36 hours at the ball milling speed of 500rpm to obtain black powder, namely the radiation cooling nano composite material;
(2) 200 parts of radiation cooling nano composite material, 100 parts of epoxy resin, 2 parts of anti-settling agent and 20 parts of n-butyl alcohol and cyclohexanone with the solvent volume ratio of 1:1 are mixed at 1200rpm for 35min to obtain a component A;
(3) 6 parts of component B curing agent polyamide is added into the component A, and then the mixture is mixed for 5min at a high speed of 1200rpm to obtain heat dissipation coating slurry;
(4) and uniformly coating the slurry on the surface of the metal radiating fin of the power module by a spraying method, and curing for 36 hours at the temperature of 25 ℃ to obtain the radiation cooling coating of the power module.
(5) And testing the thickness, the balance temperature, the cooling amplitude and the thermal radiation coefficient of the prepared power module radiation cooling coating. The results are shown in Table 1.
Example 3:
(1) graphite and h-BN nanosheets are mixed in a weight ratio of 2: 3 preparing the radiation cooling nano composite material, wherein the specific preparation process comprises the following steps:
20.0g of scaly graphite, 30.0g of 30.0g h-BN nano sheet and 1000g of zirconia balls with the diameter of 6mm are placed in a 0.5L steel sealed tank, the sealed tank is vacuumized, and ball milling is carried out at the ball milling speed of 500rpm for 24 hours to obtain black powder, namely the radiation cooling nano composite material;
(2) mixing 150 parts of radiation cooling nano composite material, 100 parts of acrylic resin, 1 part of anti-settling agent and 10 parts of n-butyl alcohol and cyclohexanone with the solvent volume ratio of 1:1 at 1200rpm for 30min to obtain a component A;
(3) adding 4 parts of curing agent isocyanate of the component B into the component A, and then mixing at a high speed of 1200rpm for 10min to obtain heat dissipation coating slurry;
(4) and uniformly coating the slurry on the surface of the metal radiating fin of the IGBT power module by a spraying method, and curing for 32 hours at the temperature of 25 ℃ to obtain the radiation cooling coating of the IGBT power module.
(5) And testing the thickness, the balance temperature, the cooling amplitude and the thermal radiation coefficient of the prepared radiation cooling coating of the IGBT power module. The results are shown in Table 1.
Comparative example 1:
(1) mixing 100 parts of acrylic resin, 1.5 parts of anti-settling agent organic bentonite and 15 parts of n-butanol and cyclohexanone with the solvent volume ratio of 1:1 at 1200rpm for 25min to obtain a component A;
(2) adding 5 parts of curing agent isocyanate of the component B into the component A, and then mixing at a high speed of 1200rpm for 5min to obtain heat dissipation coating slurry;
(3) and uniformly coating the slurry on the surface of the metal radiating fin of the IGBT power module by a spraying method, and curing for 24 hours at the temperature of 25 ℃ to obtain the radiation cooling coating of the IGBT power module.
(4) And testing the thickness, the balance temperature, the cooling amplitude and the thermal radiation coefficient of the prepared radiation cooling coating of the IGBT power module. The results are shown in Table 1.
Comparative example 2:
(1) the radiation cooling nano material is prepared from pure graphite by the following specific preparation process:
putting 50.0g of scaly graphite and 1000g of zirconia balls with the diameter of 6mm into a 0.5L steel sealed tank, vacuumizing the sealed tank, and performing ball milling at the ball milling speed of 500rpm for 24 hours to obtain black powder, namely the graphite radiation cooling nano material;
(2) mixing 150 parts of graphite radiation cooling nano material, 100 parts of epoxy resin, 1.5 parts of anti-settling agent organic bentonite and 15 parts of n-butyl alcohol and cyclohexanone with the solvent volume ratio of 1:1 at 1200rpm for 25min to obtain a component A;
(3) adding 5 parts of phenolic aldehyde amine serving as a curing agent of the component B into the component A, and then mixing at a high speed of 1200rpm for 5min to obtain heat dissipation coating slurry;
(4) and uniformly coating the slurry on the surface of the metal radiating fin of the IGBT power module by a spraying method, and curing for 24 hours at the temperature of 25 ℃ to obtain the radiation cooling coating of the IGBT power module.
(5) And testing the thickness, the balance temperature, the cooling amplitude and the thermal radiation coefficient of the prepared radiation cooling coating of the IGBT power module. The results are shown in Table 1.
Comparative example 3:
(1) the radiation cooling nano material is prepared from pure h-BN nano sheets, and the specific preparation process comprises the following steps:
putting 50.0g h-BN nano-sheet and 1000g of zirconia balls with the diameter of 6mm into a 0.5L steel sealed tank, vacuumizing the sealed tank, and carrying out ball milling for 24h at the ball milling speed of 500rpm to obtain white powder, namely the h-BN radiation cooling nano-material;
(2) mixing 150 parts of h-BN radiation cooling nano material, 100 parts of acrylic resin, 1.5 parts of anti-settling agent organic bentonite and 15 parts of n-butyl alcohol and cyclohexanone with the solvent volume ratio of 1:1 at 1200rpm for 25min to obtain a component A;
(3) adding 5 parts of curing agent isocyanate of the component B into the component A, and then mixing at a high speed of 1200rpm for 5min to obtain heat dissipation coating slurry;
(4) and uniformly coating the slurry on the surface of the metal radiating fin of the IGBT power module by a spraying method, and curing for 24 hours at the temperature of 25 ℃ to obtain the radiation cooling coating of the IGBT power module.
(5) And testing the thickness, the balance temperature, the cooling amplitude and the thermal radiation coefficient of the prepared radiation cooling coating of the IGBT power module. The results are shown in Table 1.
TABLE 1 TABLE of Performance parameters of radiation-radiating coatings of examples and comparative examples
Compared with the phenomena of agglomeration, low thermal emissivity and the like generated by the existing product, the balance temperature, the cooling temperature and the thermal emissivity of the invention are measured by the embodiment and the comparative example, and as can be seen from the table 1, the radiation heat dissipation coating filled with the graphene/h-BN nanosheet composite material has very excellent radiation heat dissipation performance.
The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (9)
1. The high-efficiency heat dissipation coating for the surface of the aluminum alloy radiator is characterized by comprising the following raw materials: radiation cooling the nanocomposite; the radiation cooling nano composite material consists of graphene and h-BN, and the radiation cooling nano composite material obtains a radiation cooling function.
2. The efficient heat dissipation coating for the surface of the aluminum alloy radiator as recited in claim 1, wherein the radiation cooling nanocomposite is obtained by mechanically ball-milling the following raw materials in parts by weight at a speed of 300-600 rpm for 12-48 hours under vacuum or inert gas protection:
100 parts of graphite materials;
20-150 parts of h-BN.
3. The efficient heat-dissipating coating for aluminum alloy radiator surfaces as claimed in claim 1, wherein said graphite-like material is highly oriented graphite-like material selected from one of flake graphite, high-purity graphite block, highly oriented pyrolytic graphite, and expanded graphite.
4. The high-efficiency heat-dissipation coating for the surface of the aluminum alloy radiator as recited in claim 1, wherein the h-BN is one of nano-flake, rod and sphere, and the size of the h-BN is 100nm to 1 μm.
5. The high-efficiency heat dissipation coating for the surface of the aluminum alloy radiator as recited in claim 1, wherein the preparation method of the coating is as follows:
placing raw materials of graphite materials and h-BN into a sealing tank, keeping a vacuum or inert gas state in the sealing tank, and carrying out ball milling for 12-48 h, wherein the weight ratio of ball milling materials to balls is 1: 20, the ball milling speed is 300-600 rpm, the ball diameter is 4-8 mm, and the volume of the sealed tank is 0.1-2L.
6. The high-efficiency heat dissipation coating for the surface of the aluminum alloy radiator as recited in claim 1, wherein the raw materials of the coating further comprise: organic resin, curing agent, anti-settling agent and solvent; the radiation cooling nano composite material and the radiation cooling nano composite material form the raw materials of the radiation cooling coating according to the following parts:
7. the high-efficiency heat-dissipating coating for aluminum alloy heat sink surfaces as claimed in claim 6, wherein the organic resin is selected from one of epoxy resin, silicone resin and acrylic resin; the curing agent is selected from one of polyamide, phenolic amine, polyether amine and isocyanate; the anti-settling agent is selected from one or more of organic bentonite, amide wax and hydrogenated castor oil; the solvent is one or more selected from xylene, n-butanol, acetone and cyclohexanone.
8. The method for preparing the high-efficiency heat dissipation coating for the surface of the aluminum alloy radiator as recited in claim 6, comprising the following steps:
1) weighing the radiation-cooled nano composite material, and putting the nano composite material, the binder, the solvent and the anti-settling agent into a container for high-speed dispersion for 20 min-1 h to obtain a component A;
2) uniformly dispersing the component A and the curing agent of the component B at a high speed for 5-10 min to obtain slurry;
3) and uniformly coating the slurry on the surface of the metal radiating fin by a spraying or dip-coating method, and curing for 10-48 hours at the temperature of 25-35 ℃ to finally obtain the radiation cooling coating of the IGBT power module.
9. The method for preparing the high-efficiency heat dissipation coating for the surface of the aluminum alloy radiator as recited in claim 8, wherein in the steps 1) and 2), a planetary gravity mixer is used in the process of stirring and dispersing the slurry at a high speed, a polytetrafluoroethylene tank and zirconia balls are used for stirring and dispersing, the stirring speed is 600-1500 rpm, and the diameter of the zirconia balls is 4-10 mm.
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| CN113943516A (en) * | 2021-10-12 | 2022-01-18 | 南京永睿新材料科技有限公司 | Efficient radiation cooling coating for surface of power grid distribution cabinet and preparation method thereof |
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| CN106085104A (en) * | 2016-06-14 | 2016-11-09 | 深圳市鑫成炭素科技有限公司 | Infrared heat radiation coating of Graphene and preparation method thereof |
| CN109041577B (en) * | 2017-02-07 | 2020-12-25 | 玖鼎材料股份有限公司 | Fin type heat exchanger |
| CN108928062A (en) * | 2018-05-07 | 2018-12-04 | 佛山职业技术学院 | A kind of heat loss through radiation composite aluminum substrate and preparation method thereof |
| CN112625596A (en) * | 2020-12-23 | 2021-04-09 | 中山市海兰德化工有限公司 | Graphite paint heat dissipation coating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113943516A (en) * | 2021-10-12 | 2022-01-18 | 南京永睿新材料科技有限公司 | Efficient radiation cooling coating for surface of power grid distribution cabinet and preparation method thereof |
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