CN219269382U - Graphene metal composite radiator - Google Patents
Graphene metal composite radiator Download PDFInfo
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- CN219269382U CN219269382U CN202222871608.4U CN202222871608U CN219269382U CN 219269382 U CN219269382 U CN 219269382U CN 202222871608 U CN202222871608 U CN 202222871608U CN 219269382 U CN219269382 U CN 219269382U
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Abstract
The utility model provides a graphene metal composite radiator, which comprises a radiating base and at least one graphene metal composite radiating fin connected with the radiating base, wherein the graphene metal composite radiating fin comprises a plurality of graphene heat conducting fins, the opposite outer surfaces of adjacent graphene heat conducting fins are coated with metal layers, and the adjacent metal layers are connected through a first connecting layer. According to the graphene metal composite radiator disclosed by the utility model, the graphene metal composite radiating fins are adopted, the metal layers of the graphene metal composite radiating fins not only improve the surface reactivity of the graphene heat-conducting fins, but also improve the strength of the graphene heat-conducting fins, and the adjacent graphene heat-conducting fins coated with the metal layers are connected through the first connecting layer, so that the multi-layer graphene heat-conducting fins are tightly combined, and the radiator has light weight and high radiating efficiency.
Description
Technical Field
The utility model relates to the technical field of radiators, in particular to a graphene metal composite radiator.
Background
The radiator is important in a device heat radiation systemOne of the basic heat dissipation materials/devices is used for enhancing the heat dissipation capacity by increasing the heat dissipation area so as to quickly transfer the heat generated by the heat source, and is widely applied to various heat dissipation systems at present. The radiator is generally made of metal aluminum and copper, and a small part of the radiator is made of ceramic and nonmetallic materials. The materials used to make the heat sink need to have good thermal conductivity and good mechanical strength to meet processing and installation requirements. The most widely used aluminum alloy radiator at present has the advantages of light weight and better radiating effect, but the aluminum alloy has the heat conductivity coefficient of about 200W/(m.K) and the density of 2.7g/cm 3 Heat conduction and light weight cannot be achieved. The heat conductivity of copper material of the copper radiator is about 400W/(m.K), and the density is 8.9g/cm 3 And heat conduction and light weight cannot be achieved. With the development of industry, high power and integration trend, and higher requirements are put on heat dissipation materials and heat sinks, so that the conventional metal heat sinks have become more and more difficult to meet the heat dissipation requirements. High-power and integrated products require a radiator with higher power, and the radiator has light weight and heat dissipation efficiency. The heat dissipation efficiency and the light weight of the metal heat sink cannot meet the requirements.
Disclosure of Invention
Aiming at one or more of the problems in the prior art, the utility model provides a graphene metal composite, which comprises a heat dissipation base and at least one graphene metal composite heat dissipation fin connected with the heat dissipation base, wherein the graphene metal composite heat dissipation fin comprises a plurality of graphene heat conduction fins, each graphene metal composite heat dissipation fin comprises a plurality of graphene heat conduction fins, the opposite outer surfaces of adjacent graphene heat conduction fins are coated with metal layers, and the adjacent metal layers are connected through a first connecting layer.
Optionally, a plurality of grooves are formed in the surface, connected with the graphene metal composite radiating fins, of the radiating base, and the grooves are used for inserting the graphene metal composite radiating fins.
Alternatively, the width of the groove is 0.1mm to 0.5mm greater than the thickness of the graphene metal composite heat dissipation fin, the groove is not easy to install if the width is too narrow, and the thermal resistance is too large if the width of the groove is too wide, so that the heat conduction effect is affected (see comparative example 1 and comparative example 2, which are only simple examples in numerous examples, and in practical research, a large number of comparative experiments are performed), and in order to better combine the heat dissipation fin with the base, the width of the groove is preferably 0.15mm greater than the thickness of the graphene metal composite heat dissipation fin.
Optionally, the depth of the groove is 1 mm-10 mm, the groove depth is too small, the radiating fins are easy to fall off after installation, the combination is poor, the thickness of the base is too large due to the too large groove depth, the structural design is affected, and in order to enable the radiating fins to be combined with the base better, the optimal effect is exerted, and preferably, the depth of the groove is 2mm.
Optionally, the slotting rate of the surface, where the heat dissipation base is connected with the graphene metal composite heat dissipation fins, is 20% -90%, if the slotting rate is too small, the number of installed heat dissipation fins is small, the heat dissipation capacity is insufficient, and if the slotting rate is too high, the number of installed heat dissipation fins is large, the installation is difficult, and preferably, the slotting rate of the surface, where the heat dissipation base is connected with the graphene metal composite heat dissipation fins, is 50%.
Optionally, the heat dissipation device further comprises a second connection layer, wherein the second connection layer is used for connecting the heat dissipation base and the graphene metal composite heat dissipation fin.
Optionally, the second connection layer is disposed within the groove.
Optionally, the material of the second connecting layer is low-temperature soldering paste or heat-conducting polymer adhesive. The second connecting layer fills the gap between the fin and the heat dissipation base, and air is exhausted, so that the graphene metal composite heat dissipation fin is fixed on the heat dissipation base, and the interface thermal resistance between the graphene metal composite heat dissipation fin and the heat dissipation base is reduced.
Optionally, the thermally conductive polymeric adhesive comprises one or more of thermally conductive silicone, thermally conductive epoxy and thermally conductive acrylate.
Optionally, the heat dissipation base is an aluminum alloy base, a copper base, a stainless steel base, a ceramic base or a water cooling plate base.
Optionally, the thickness of the graphene heat-conducting sheet is 8 μm-300 μm, the thinner the graphene heat-conducting sheet is, the softer the graphene heat-conducting sheet is, the more easily deformed, the mechanical operation cannot be performed, and if the graphene heat-conducting sheet is larger than 300 μm, the interlayer binding force is smaller and the requirement of manufacturing the heat-radiating fin cannot be met, and preferably, the thickness of the graphene heat-conducting sheet is 40 μm-200 μm.
Alternatively, the thickness of the metal layer is 2 μm to 10 μm, and the thickness of the metal layer is less than 2 μm, the interlayer bonding force may be poor, and exceeding 10 μm increases the thermal resistance, affecting the heat conduction effect, and preferably, the thickness of the metal layer is 5 μm.
Alternatively, the thickness of the first connection layer is 2 μm to 20 μm, and the thickness of the connection layer is less than 2 μm, the interlayer bonding force may be poor, and exceeding 20 μm may increase thermal resistance, affecting the heat conduction effect, and preferably, the thickness of the first connection layer is 10 μm.
Optionally, the thickness of the graphene metal composite heat dissipation fin is 0.2 mm-5 mm, and preferably, the thickness of the graphene metal composite heat dissipation fin is 0.5 mm-2 mm.
Optionally, the material of the first connecting layer is low-temperature soldering paste, high-temperature soldering paste or metal soldering powder.
Optionally, the composition of the metal layer is one or a combination of more of silver, nickel, copper, titanium, tin, indium, bismuth, zinc, zirconium and chromium.
Optionally, the graphene heat-conducting sheets are graphene heat-conducting sheets arranged in an in-plane orientation. In-plane orientation refers to the arrangement of the graphene in the graphene heat-conducting sheets in a leaf-like stacked structure along the X-Y plane of the graphene heat-conducting sheets.
Optionally, a plurality of through holes are formed in the graphene heat conducting sheets, the metal layers are coated on the outer surfaces of the graphene heat conducting sheets and the inner surfaces of the through holes, and the first connecting layers are coated between the metal layers of the adjacent graphene heat conducting sheets and filled in the through holes.
Optionally, the aperture ratio of the graphene heat conducting sheet is 10% -90%, and according to research, it is found that too low aperture ratio can cause poor interlayer bonding force and poor longitudinal heat conducting effect, and too high aperture ratio can cause the effective area of the graphene heat conducting sheet to be reduced, so that the heat conducting effect is reduced, and according to research, the aperture ratio is 10% -90%, and the graphene heat conducting sheet has heat conducting channels, so that the requirement of high heat conduction can be met. Preferably, the opening ratio of the graphene heat conducting sheet is 20% -50%, so that the heat conducting efficiency is ensured, and the interlayer binding force is also ensured.
According to the graphene metal composite radiator disclosed by the utility model, the graphene metal composite radiating fins are adopted, the metal layers of the graphene metal composite radiating fins not only improve the surface reactivity of the graphene heat conducting fins, but also improve the strength of the graphene heat conducting fins, and the graphene heat conducting fins coated with the metal layers are connected through the first connecting layers (when the first connecting layers are solder, the first connecting layers are welded), so that the graphene heat conducting fins are tightly combined, the heat conductivity of the graphene metal composite radiating fins is improved, the light weight is facilitated, the heat conductivity of the graphene metal composite radiating fins can be more than or equal to 1000W/(m.K), the density is less than or equal to 2.2g/cm < 3 >, the high heat conductivity can be maintained, the light weight is simultaneously realized, and the radiator disclosed by the utility model has light weight and high heat dissipation efficiency.
The graphene metal composite radiating fin of the graphene metal composite radiator is of a stacked sandwich structure with a plurality of graphene heat conducting fins stacked, a metal layer wrapped and a connecting layer sandwiched, has the heat conductivity coefficient exceeding that of the traditional radiating material, and also has the advantages of low density and high mechanical strength, so that the radiator adopting the graphene metal composite radiating fin has the advantages of high radiating efficiency, light weight and the like, and can be widely applied to various high-power radiating scenes.
According to the radiator, the graphene heat conducting sheets are provided with the through holes, heat conducting channels are formed among the graphene heat conducting sheets, so that the heat conductivity is improved, and meanwhile, the interlayer binding force is improved through the metal layer and the first connecting layer.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a schematic top view of one embodiment of a heat sink according to the present utility model;
FIG. 2 is a schematic diagram of one embodiment of a graphene metal composite heat sink fin according to the present utility model.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. They are, of course, merely examples and are not intended to limit the utility model. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.
Fig. 1 is a schematic top view of an embodiment of a heat sink according to the present utility model, as shown in fig. 1, the heat sink includes a heat dissipation base 2 and at least one graphene metal composite heat dissipation fin 1 connected to the heat dissipation base.
Preferably, a plurality of grooves are formed in the surface, connected with the graphene metal composite radiating fins, of the radiating base, and the grooves are used for inserting the graphene metal composite radiating fins.
The graphene metal composite heat dissipation fin may be in clearance fit with the groove, and inserted into the groove for fixing, so as to reduce interface thermal resistance between the graphene metal composite heat dissipation fin and the heat dissipation base, and in one embodiment, the heat sink further includes a second connection layer, where the second connection layer is used to connect the heat dissipation base and the graphene metal composite heat dissipation fin. Preferably, the second connection layer is a combination part of the graphene metal composite radiating fin and a grooved part on the surface of the radiating base.
Fig. 2 is a schematic diagram of an embodiment of the graphene metal composite heat dissipation fin according to the present utility model, as shown in fig. 2, the graphene metal composite heat dissipation fin 1 includes a plurality of graphene heat conduction sheets 11, opposite outer surfaces of adjacent graphene heat conduction sheets are coated with metal layers 12, and adjacent metal layers 12 are connected through a first connection layer 13.
Preferably, the outer surface of the graphene heat-conducting sheet is coated with a metal layer 12, and the adjacent graphene heat-conducting sheets coated with the metal layer are connected through a first connecting layer 13.
In order to illustrate the beneficial effects of the heat sink of the present utility model, the following specific embodiments are listed:
example 1
In this embodiment, the graphene metal composite radiator includes a 230 μm graphene metal composite radiating fin and an aluminum alloy radiating base, where the graphene metal composite radiating fin includes 4 graphene heat conductive sheets 40 μm, 5 μm metallic copper layers deposited by PVD (physical vapor deposition) method are coated between adjacent metallic copper layers, metallic silver copper-titanium solder with a thickness of 10 μm is coated between adjacent metallic copper layers, and after welding in a welding furnace, a first connection layer is formed by cooling to connect adjacent metallic layers, so as to form a 230 μm graphene metal composite radiating fin, and according to test, the graphene metal composite radiating fin has a thermal conductivity coefficient of 1400W/(m·k) and a density of 2.15g/cm 3 Bending strength 40MPa; the slotting rate of the aluminum alloy radiating base is 50%, the width of the slot is 380 mu m (230+150 mu m), the depth of the slot is 2mm, the slot is fully coated with low-temperature soldering paste for inserting the graphene metal composite radiating fins, and the welding treatment is carried out in an oven to form a second connecting layer for connecting the adjacent graphene metal composite radiating fins and the radiating base, so that the graphene metal composite radiator is formed. Through testing, the heat dissipation power of the graphene metal composite heat sink is 410W/kg.
Example 2
In this embodiment, graphene metal is complexThe heat radiator comprises 870 mu m graphene metal composite heat radiating fins and an aluminum alloy heat radiating base, wherein the graphene metal composite heat radiating fins comprise 4 200 mu m graphene heat conducting fins, 5 mu m metal copper layers deposited by a Physical Vapor Deposition (PVD) method are arranged on the surfaces of the graphene heat conducting fins, metal silver copper titanium solder with the thickness of 10 mu m is coated between the adjacent metal copper layers, a first connecting layer connected with the adjacent metal layers is formed by cooling after welding in a welding furnace, so that 870 mu m graphene metal composite heat radiating fins are formed, and the graphene metal composite heat radiating fins have the heat conductivity coefficient of 1500W/(m.K) and the density of 2.1g/cm through testing 3 Bending strength is 30MPa; the slotting rate of the aluminum alloy radiating base is 50%, the width of the slot is 1020 mu m (870+150 mu m), the depth of the slot is 2mm, the slot is fully coated with low-temperature soldering paste for inserting the graphene metal composite radiating fins, and the welding treatment is carried out in an oven to form a second connecting layer for connecting the adjacent graphene metal composite radiating fins and the radiating base, so that the graphene metal composite radiator is formed. Through testing, the heat dissipation power of the graphene metal composite heat radiator is 505W/kg.
Example 3
In this embodiment, the graphene metal composite radiator includes 870 μm graphene metal composite radiating fins and an aluminum alloy radiating base, where the graphene metal composite radiating fins include 4 200 μm graphene heat conducting fins, 5 μm metal copper layers deposited by PVD (physical vapor deposition) method are coated between adjacent metal copper layers, metal silver copper titanium solder with thickness of 10 μm is coated between adjacent metal copper layers, and after welding in a welding furnace, the first connection layer is formed by cooling to connect adjacent metal layers, so as to form 870 μm graphene metal composite radiating fins, and according to test, the graphene metal composite radiating fins have a heat conductivity coefficient of 1500W/(m·k) and a density of 2.1g/cm 3 Bending strength is 30MPa; the aluminum alloy heat dissipation base has a slotting rate of 20%, a slot width of 1020 mu m (870+150 mu m) and a slot depth of 2mm, is coated with low-temperature soldering paste for inserting the graphene metal composite heat dissipation fins, and is subjected to welding treatment in an oven to form a second connecting layer for connecting the adjacent graphene metal composite heat dissipation fins and the heat dissipation base, so that graphene metal is formedA composite heat sink. Through testing, the heat dissipation power of the graphene metal composite heat radiator is 202W/kg.
Example 4
In this embodiment, the graphene metal composite radiator includes 870 μm graphene metal composite radiating fins and an aluminum alloy radiating base, where the graphene metal composite radiating fins include 4 200 μm graphene heat conducting fins, 5 μm metal copper layers deposited by PVD (physical vapor deposition) method are coated between adjacent metal copper layers, metal silver copper titanium solder with thickness of 10 μm is coated between adjacent metal copper layers, and after welding in a welding furnace, the first connection layer is formed by cooling to connect adjacent metal layers, so as to form 870 μm graphene metal composite radiating fins, and according to test, the graphene metal composite radiating fins have a heat conductivity coefficient of 1500W/(m·k) and a density of 2.1g/cm 3 Bending strength is 30MPa; the slotting rate of the aluminum alloy radiating base is 90%, the width of the slot is 1020 mu m (870+150 mu m), the depth of the slot is 2mm, the slot is fully coated with low-temperature soldering paste for inserting the graphene metal composite radiating fins, and the welding treatment is carried out in an oven to form a second connecting layer for connecting the adjacent graphene metal composite radiating fins and the radiating base, so that the graphene metal composite radiator is formed. Through testing, the heat dissipation power of the graphene metal composite heat sink is 820W/kg.
Example 5
In this embodiment, the graphene metal composite radiator includes 870 μm graphene metal composite radiating fins and an aluminum alloy radiating base, where the graphene metal composite radiating fins include 4 200 μm graphene heat conducting fins, 5 μm metal copper layers deposited by PVD (physical vapor deposition) method are coated between adjacent metal copper layers, metal silver copper titanium solder with thickness of 10 μm is coated between adjacent metal copper layers, and after welding in a welding furnace, the first connection layer is formed by cooling to connect adjacent metal layers, so as to form 870 μm graphene metal composite radiating fins, and according to test, the graphene metal composite radiating fins have a heat conductivity coefficient of 1500W/(m·k) and a density of 2.1g/cm 3 Bending strength is 30MPa; the aluminum alloy heat dissipation base has a slotting rate of 50%, a slot width of 970 μm (870+100 μm), a slot depth of 2mm, and is fully coated withAnd the low-temperature soldering paste is used for inserting the graphene metal composite radiating fins, and performing welding treatment in an oven to form a second connecting layer for connecting the adjacent graphene metal composite radiating fins and the radiating base, so that the graphene metal composite radiator is formed. Through testing, the heat dissipation power of the graphene metal composite heat radiator is 600W/kg.
Example 6
In this embodiment, the graphene metal composite radiator includes 870 μm graphene metal composite radiating fins and an aluminum alloy radiating base, where the graphene metal composite radiating fins include 4 200 μm graphene heat conducting fins, 5 μm metal copper layers deposited by PVD (physical vapor deposition) method are coated between adjacent metal copper layers, metal silver copper titanium solder with thickness of 10 μm is coated between adjacent metal copper layers, and after welding in a welding furnace, the first connection layer is formed by cooling to connect adjacent metal layers, so as to form 870 μm graphene metal composite radiating fins, and according to test, the graphene metal composite radiating fins have a heat conductivity coefficient of 1500W/(m·k) and a density of 2.1g/cm 3 Bending strength is 30MPa; the slotting rate of the aluminum alloy radiating base is 50%, the width of the slot is 1370 mu m (870+500 mu m), the depth of the slot is 2mm, the slot is fully coated with low-temperature soldering paste for inserting the graphene metal composite radiating fins, and the welding treatment is carried out in an oven to form a second connecting layer for connecting the adjacent graphene metal composite radiating fins and the radiating base, so that the graphene metal composite radiator is formed. Through testing, the heat dissipation power of the graphene metal composite heat radiator is 400W/kg.
Example 7
In this embodiment, the graphene metal composite radiator includes a 230 μm graphene metal composite radiating fin and an aluminum alloy radiating base, where the graphene metal composite radiating fin includes 4 graphene heat conductive sheets 40 μm, 5 μm metal copper layers deposited by PVD (physical vapor deposition) method are disposed on the surfaces of each graphene heat conductive sheet, low-temperature solder paste with a thickness of 10 μm is coated between adjacent metal copper layers, and after welding in a welding furnace, a first connection layer is formed by cooling to connect adjacent metal layers, thereby forming a 230 μm graphene metal composite radiating fin, and according to the test, the heat conduction system of the graphene metal composite radiating finThe number is 1400W/(m.K), and the density is 2.15g/cm 3 Bending strength 40MPa; the slotting rate of the aluminum alloy radiating base is 50%, the width of the slot is 380 mu m (230+150 mu m), the depth of the slot is 2mm, the slot is fully coated with low-temperature soldering paste for inserting the graphene metal composite radiating fins, and the welding treatment is carried out in an oven to form a second connecting layer for connecting the adjacent graphene metal composite radiating fins and the radiating base, so that the graphene metal composite radiator is formed. Through testing, the heat dissipation power of the graphene metal composite heat sink is 410W/kg.
Example 8
In this embodiment, the graphene metal composite radiator includes a 230 μm graphene metal composite radiating fin and an aluminum alloy radiating base, where the graphene metal composite radiating fin includes 4 graphene heat conductive sheets 40 μm, 5 μm metal copper layers deposited by PVD (physical vapor deposition) method are disposed on surfaces of each graphene heat conductive sheet, low-temperature solder paste with a thickness of 10 μm is coated between adjacent metal copper layers, and after welding in a welding furnace, a first connection layer is formed by cooling to connect adjacent metal layers, so as to form a 230 μm graphene metal composite radiating fin, and according to test, the graphene metal composite radiating fin has a heat conductivity coefficient of 1400W/(m·k) and a density of 2.15g/cm 3 Bending strength 40MPa; the aluminum alloy heat dissipation base has a slotting rate of 50%, a slot width of 380 mu m (230+150 mu m) and a slot depth of 2mm, a heat conduction polymer adhesive is coated in the slot for inserting the graphene metal composite heat dissipation fins, and welding treatment is performed in an oven to form a second connecting layer for connecting the adjacent graphene metal composite heat dissipation fins and the heat dissipation base, so that the graphene metal composite heat sink is formed. Through testing, the heat dissipation power of the graphene metal composite heat radiator is 390W/kg.
Example 9
In this embodiment, the graphene metal composite radiator includes 870 μm graphene metal composite radiating fins and an aluminum alloy radiating base, where the graphene metal composite radiating fins include 4 graphene heat conducting fins with 200 μm, the aperture ratio of each graphene heat conducting fin is 50%, the aperture diameter is 1mm, the aperture mode is laser drilling, and the surface PV of the apertured graphene heat conducting fin is providedThe D (physical vapor deposition) method is used for depositing 5 mu m metal copper layers, metal silver copper titanium solder with the thickness of 10 mu m is coated between adjacent metal copper layers, and the metal silver copper titanium solder is cooled after being welded by a welding furnace to form a first connecting layer connected with the adjacent metal layers, so that 870 mu m graphene metal composite radiating fins are formed, and the graphene metal composite radiating fins have the heat conductivity coefficient of 1300W/(m.K) and the density of 2.25g/cm through test 3 Bending strength 60MPa; the slotting rate of the aluminum alloy radiating base is 90%, the width of the slot is 1020 mu m (870+150 mu m), the depth of the slot is 2mm, the slot is fully coated with low-temperature soldering paste for inserting the graphene metal composite radiating fins, and the welding treatment is carried out in an oven to form a second connecting layer for connecting the adjacent graphene metal composite radiating fins and the radiating base, so that the graphene metal composite radiator is formed. Through testing, the heat dissipation power of the graphene metal composite heat radiator is 720W/kg.
Example 10
In this embodiment, the graphene metal composite radiator includes 870 μm graphene metal composite radiating fins and an aluminum alloy radiating base, where the graphene metal composite radiating fins include 4 200 μm graphene heat conducting fins, each of which has an aperture ratio of 20%, an aperture diameter of 1mm, the aperture mode is laser drilling, 5 μm metal copper layers are deposited on the surface of the apertured graphene heat conducting fins by PVD (physical vapor deposition) method, metal silver-copper-titanium solders with a thickness of 10 μm are coated between the adjacent metal copper layers, and a first connection layer connected to the adjacent metal layers is formed by cooling after welding in a welding furnace, so as to form 870 μm graphene metal composite radiating fins, and according to test, the graphene metal composite radiating fins have a heat conductivity coefficient of 1400W/(m·k) and a density of 2.2g/cm 3 Bending strength 40MPa; the slotting rate of the aluminum alloy radiating base is 90%, the width of the slot is 1020 mu m (870+150 mu m), the depth of the slot is 2mm, the slot is fully coated with low-temperature soldering paste for inserting the graphene metal composite radiating fins, and the welding treatment is carried out in an oven to form a second connecting layer for connecting the adjacent graphene metal composite radiating fins and the radiating base, so that the graphene metal composite radiator is formed. Through testing, the heat dissipation power of the graphene metal composite heat radiator is 780W/kg.
Comparative example 1
In the comparative example, the graphene metal composite radiator comprises 870 mu m graphene metal composite radiating fins and an aluminum alloy radiating base, wherein the graphene metal composite radiating fins comprise 4 200 mu m graphene heat conducting fins, 5 mu m metal copper layers deposited by a Physical Vapor Deposition (PVD) method are arranged on the surfaces of each graphene heat conducting fin, metal silver copper titanium solder with the thickness of 10 mu m is coated between the adjacent metal copper layers, and the first connecting layers connected with the adjacent metal layers are formed after the graphene metal composite radiating fins are welded by a welding furnace and cooled to form 870 mu m graphene metal composite radiating fins; the slotting rate of the aluminum alloy heat dissipation base is 50%, the width of the slot is 920 mu m (870+50 mu m), the depth of the slot is 2mm, the slot is fully coated with low-temperature soldering paste, the width of the slot is too narrow, and as a result, the fins are difficult to install, and the surfaces of the fins are damaged.
Comparative example 2
In the comparative example, the graphene metal composite radiator comprises 870 mu m graphene metal composite radiating fins and an aluminum alloy radiating base, wherein the graphene metal composite radiating fins comprise 4 200 mu m graphene heat conducting fins, 5 mu m metal copper layers deposited by a Physical Vapor Deposition (PVD) method are arranged on the surfaces of each graphene heat conducting fin, metal silver copper titanium solder with the thickness of 10 mu m is coated between the adjacent metal copper layers, and the first connecting layers connected with the adjacent metal layers are formed after the graphene metal composite radiating fins are welded by a welding furnace and cooled to form 870 mu m graphene metal composite radiating fins; the aluminum alloy heat dissipation base has a slotting rate of 50%, the width of the slot is 1470 mu m (870+600 mu m), the depth of the slot is 2mm, the slot is fully coated with low-temperature soldering paste for inserting the graphene metal composite heat dissipation fins, and the soldering treatment is carried out in an oven to form a second connecting layer for connecting the adjacent graphene metal composite heat dissipation fins and the heat dissipation base, so that the graphene metal composite heat radiator is formed. Through testing, the heat dissipation power of the graphene metal composite heat radiator is 200W/kg, the width of the groove is too wide, and the heat dissipation power of the heat radiator is reduced.
With comparative examples 1 and 2, the width of the groove plays a critical role, and neither too wide nor too narrow can achieve the desired effect.
The above embodiments according to the present utility model are illustrative, and various changes and modifications may be made by the person skilled in the art without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the contents of the specification, and must be determined according to the scope of the claims.
The foregoing is a preferred embodiment of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (22)
1. The graphene metal composite radiator is characterized by comprising a radiating base and at least one graphene metal composite radiating fin connected with the radiating base, wherein the graphene metal composite radiating fin comprises a plurality of graphene heat conducting fins, the outer surfaces of the adjacent graphene heat conducting fins, which are opposite, are coated with metal layers, and the adjacent metal layers are connected through a first connecting layer.
2. The graphene metal composite radiator according to claim 1, wherein a plurality of grooves are formed in a surface of the radiating base, which is connected with the graphene metal composite radiating fins, and the grooves are used for inserting the graphene metal composite radiating fins.
3. The graphene metal composite heat sink according to claim 2, wherein the width of the groove is 0.1mm to 0.5mm greater than the thickness of the graphene metal composite heat sink fin.
4. The graphene metal composite heat sink according to claim 2, wherein the width of the groove is 0.15mm greater than the thickness of the graphene metal composite heat sink fin.
5. The graphene metal composite heat sink according to claim 2, wherein the depth of the groove is 1mm to 10mm.
6. The graphene metal composite heatsink of claim 5, wherein the depth of the groove is 2mm.
7. The graphene metal composite radiator according to claim 2, wherein a slotting rate of a face of the radiating base connected with the graphene metal composite radiating fin is 20% -90%.
8. The graphene metal composite heat sink according to claim 7, wherein a slotting rate of a face of the heat dissipation base connected with the graphene metal composite heat dissipation fin is 50%.
9. The graphene metal composite heat sink according to claim 2, wherein the heat dissipation base is an aluminum alloy base, a copper base, a stainless steel base, a ceramic base, or a water-cooled plate base.
10. The graphene metal composite heat sink according to claim 2, further comprising a second connection layer for connecting the heat dissipation base and the graphene metal composite heat dissipation fin.
11. The graphene metal composite heatsink of claim 10, wherein the second connection layer is disposed within the groove.
12. The graphene metal composite radiator according to claim 10, wherein the material of the second connection layer is low-temperature solder paste or a heat-conducting polymer adhesive.
13. The graphene metal composite heat sink according to claim 1, wherein the material of the first connection layer is low-temperature solder paste, high-temperature solder paste or metal solder powder.
14. The graphene metal composite heat sink according to claim 1, wherein the graphene heat conducting sheet has a thickness of 8 μm to 300 μm.
15. The graphene metal composite heat sink according to claim 14, wherein the graphene heat conducting sheet has a thickness of 40 μm to 200 μm.
16. The graphene metal composite heat sink according to claim 1, wherein the thickness of the metal layer is 2-10 μm.
17. The graphene metal composite heatsink of claim 16, wherein the metal layer has a thickness of 5 μιη.
18. The graphene metal composite heat sink according to claim 1, wherein the thickness of the first connection layer is 2-20 μm.
19. The graphene metal composite heatsink of claim 18, wherein the first connection layer has a thickness of 10 μιη.
20. The graphene metal composite radiator according to claim 1, wherein the thickness of the graphene metal composite radiating fin is 0.2 mm-5 mm.
21. The graphene metal composite heat sink according to claim 20, wherein the thickness of the graphene metal composite heat sink fin is 0.5 mm-2 mm.
22. The graphene-metal composite radiator according to claim 1, wherein a plurality of through holes are formed in the graphene heat-conducting sheets, the metal layers are coated on the outer surfaces of the graphene heat-conducting sheets and the inner surfaces of the through holes, and the first connection layer is coated between the metal layers of adjacent graphene heat-conducting sheets and filled in the through holes.
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| CN (1) | CN219269382U (en) |
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2022
- 2022-10-27 CN CN202222871608.4U patent/CN219269382U/en active Active
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