CN209052623U - A kind of nested multilayer laminar pleated structure heat-conducting article - Google Patents
A kind of nested multilayer laminar pleated structure heat-conducting article Download PDFInfo
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Abstract
The utility model provides a kind of nested multilayer laminar pleated structure heat-conducting article, is made of the heat-conducting layer of two layers or more, setting stacked on top of one another, and the heat-conducting layer has stratiform pleated structure, and the pleated structure of adjacent heat conductive layers is mutually nested.The utility model is stacked on top of one another by using two layers or more of stratiform pleated structure Heat Conduction Material, keep fold mutually nested through level compacting, heat-conducting article is prepared, heat-conducting article than single layer stratiform pleated structure material through same size made of horizontal compacting, gap between fold is smaller, and nested pleated structure, it can be from the movement of spatially mutual nonsequent fold, it avoids and forms biggish gap in fold rebound due to internal stress, to reduce interface resistance, heating conduction is improved；After placing the same time, shape and size stability is more preferable；It is easier to obtain target size and shape in processing of cutting.
Description
Technical field
The utility model relates to heat-conducting article technical field more particularly to a kind of nested multilayer laminar pleated structure are thermally conductive
Product.
Background technique
Heat conductive pad is high-performance gap filling Heat Conduction Material, the heat transmitting being mainly used between heating device and radiator.
The heat conductive pad of traditional macromolecule matrix filling thermal conductive ceramic particle has been difficult to meet more with the fast development of electronics industry
Carry out higher cooling requirements.
Graphite type material, such as graphene, expanded graphite, electrographite, hexagonal boron nitride two-dimensional layer material have very
High thermal conductivity is ideal conventional thermal conductive pad alternative materials.However, the heating conduction of this kind of two-dimensional layer material have it is each to
The opposite sex, so that the thermal conductivity outside two-dimensional surface face is lower.Current solution mainly regulates and controls two-dimensional layer material thermally conductive
It is arranged vertically in pad, thus close consistent with the direction of heat transfer.But the heat conductive pad compressibility of preparation can excessively poor, Wu Faying
Chip tolerance when multi-chip is used in conjunction is paid, while interface resistance is higher.
In order to make the heat conductive pad based on high thermal conductivity two-dimensional layer material have both high heat conductance and compressibility, the exploitation such as Valsartan
It is a kind of to have both vertical layer structure through what buckle fold, horizontal compacting and high-temperature process obtained by high thermal conductivity two-dimensional layer material
(Chinese patent hangs down application No. is 201710324801.7) with the two-dimensional layer pleated structure heat conductive pad of bending layer structure
Straight layer structure part can effectively ensure that the high thermal conductivity of heat conductive pad, and it is excellent that bending stratiform structure division can ensure that heat conductive pad has
Different compressibility.
The above-mentioned of the exploitations such as Valsartan is made of high thermal conductivity two-dimensional layer material, and the heat conductive pad with stratiform pleated structure exists
It needs first to process the layer structure being made of high thermal conductivity two-dimensional layer material by modulus mismatch principle in forming process and be formed
Pleated structure, then pleated structure is subjected to horizontal compacting.The pressure of level compacting can make pleated structure generate biggish inside
Stress.If the pressure of level compacting is little, once pressure is removed, internal stress will lead to pleat rebound, occur between fold
Gap, gap are filled by a large amount of bad heat conductor-air.On the one hand its result increases the interface resistance of above-mentioned heat conductive pad,
Thermal conductivity decline；On the other hand make above-mentioned heat conductive pad structural instability, in lesser external force (shearing force, drawing force, compression
Power etc.) under its shape size will change, it is difficult to machine-shaping, while also resulting in its thermally conductive and compressibility can be unstable
It is fixed.
Although can be as (Chinese patent, application No. is high by filling described in 201710324801.7) for application for patent
Molecular material and enhanced thermal conduction material exclude the air between above-mentioned heat conductive pad fold, enhancing structure stability, but fill
High molecular material and enhanced thermal conduction material can reduce the compressibility of above-mentioned heat conductive pad, improve interface resistance.Such as level compacting
The enough ambassador's pleated structures of pressure are compacted, although the heat conductive pad obtained can keep stable structure, its compressibility
It can be greatly reduced, it is difficult to deal with chip tolerance when multi-chip is used in conjunction.
Utility model content
In view of this, the technical problem to be solved by the present invention is to provide a kind of nested multilayer laminar pleated structures
Heat-conducting article is provided simultaneously with higher thermal conductivity, stability and compressibility.
In order to solve the above technical problems, the utility model provides a kind of thermally conductive system of nested multilayer laminar pleated structure
Product are made of the heat-conducting layer of two layers or more, setting stacked on top of one another, and the heat-conducting layer has stratiform pleated structure, and adjacent thermally conductive
The pleated structure of layer is mutually nested.
Preferably, it is described it is mutually nested be heat-conducting layer setting stacked on top of one another, and horizontal compacting, the nested structure of formation.
Preferably, there is gap between the adjacent heat conductive layers.
Preferably, the gap is more than or equal to 0.1 micron, is less than or equal to 100 microns.
Preferably, the heat-conducting layer is high thermal conductivity two dimension micro Nano material layer.
Preferably, in the heat-conducting layer, the fold height of pleated structure is 1~20 times of heat-conducting layer thickness.
Preferably, the heat-conducting article is heat conductive pad.
Compared with prior art, the utility model provides a kind of nested multilayer laminar pleated structure heat-conducting article, by
Two layers or more, the heat-conducting layer of setting stacked on top of one another composition, the heat-conducting layer have stratiform pleated structure, and the pleat of adjacent heat conductive layers
Structure of wrinkling is mutually nested.The utility model is stacked on top of one another by using two layers or more of stratiform pleated structure Heat Conduction Material, through water
Concora crush system keeps fold mutually nested, and heat-conducting article is prepared, than single layer stratiform pleated structure material through made of level compacting
The heat-conducting article of same size, the gap between fold is smaller, and nested pleated structure, can be from spatially mutually limitation
The movement of fold avoids and forms biggish gap in fold rebound due to internal stress, to reduce interface resistance, mentions
Heating conduction is risen；After placing the same time, shape and size stability is more preferable；It is easier to obtain target ruler in processing of cutting
Very little and shape.Simultaneously because being not necessarily to filled high polymer material and enhanced thermal conduction material, the good compressibility energy of material is remained.
Detailed description of the invention
Fig. 1 is the fold structural schematic diagram of the stratiform pleated structure of heat-conducting layer；Wherein, 1-1 illustrates the first fold structure,
1-2 illustrates second of fold structure, and 1-3 illustrates the third fold structure, and 1-4 illustrates the 4th kind of fold structure, 1-5 signal the 5th
Kind fold structure；
Fig. 2 is the mutually nested schematic diagram of pleated structure of adjacent heat conductive layers；Wherein, 2a illustrates a fold to be filled into adjacent
In one fold of layer, 2b illustrates multiple folds to be filled into a fold of adjacent heat conductive layers；
Fig. 3 is the sectional side view of two layers of stratiform pleated structure heat conductive pad of the utility model preparation；Wherein, 301 and 302 points
Not Biao Shi heat-conducting layer, 303 indicate heat-conducting layers between gap；
Fig. 4 is the sectional side view of three shape pleated structure heat conductive pads layer by layer of the utility model preparation；Wherein, 401,402 and 403
The heat-conducting layer of stratiform pleated structure is respectively indicated, 404 and 405 respectively indicate the gap between heat-conducting layer.
Specific embodiment
The utility model provides a kind of nested multilayer laminar pleated structure heat-conducting article, by two layers or more, upper and lower level
The heat-conducting layer composition of folded setting, the heat-conducting layer has stratiform pleated structure, and the pleated structure of adjacent heat conductive layers is mutually nested.
In the utility model, the heat-conducting layer is high thermal conductivity two dimension micro Nano material layer.
In some specific embodiments of the utility model, the heat-conducting layer with a thickness of 10~1000 microns.
In some specific embodiments of the utility model, the heat-conducting layer with a thickness of 100~200 microns.
In some specific embodiments of the utility model, the heat-conducting layer is graphene layer, hexagonal boron, expansion
Graphite linings or carbonization/graphited polyimide film layer etc..
Above-mentioned heat-conducting layer is multilayer laminar structure, and the utility model is first by the Heat Conduction Material fold with multilayer laminar structure
Change processing, obtains the heat-conducting layer with stratiform pleated structure, can be described as plicated layer.
In some specific embodiments of the utility model, the heat-conducting layer with stratiform pleated structure is according to lower section
Method preparation:
It is Nian Jie with the elastomer after stretching by the Heat Conduction Material with layer structure, after elastomer discharges pulling force retraction, lead
Hot material bounces back with the retraction of elastomer, and Heat Conduction Material is separated with elastomer, obtains having leading for stratiform pleated structure
Thermosphere.
In some specific embodiments of the utility model, the stretching ratio of the elastomer after the stretching is 200%~
500%.
In the heat-conducting layer, the fold height of pleated structure is 1~20 times of heat-conducting layer thickness.
In certain specific embodiments of the utility model, the fold height of the pleated structure is the 6 of heat-conducting layer thickness
~20 times.
Above-mentioned fold height refers in fold structure, the vertical range of crestal line and the line of rabbet joint.The utility model is had using above-mentioned
Thickness after the Heat Conduction Material creped of layer structure indicates fold height.
Above-mentioned heat-conducting layer thickness instructs the Heat Conduction Material thickness of thermosphere, i.e., the above-mentioned Heat Conduction Material fold with layer structure
Thickness before change processing.
In some specific embodiments of the utility model, the part fold of the pleated structure of formation as shown in Fig. 1,
In, 1-1,1-2,1-3,1-4,1-5 are different fold schematic diagrames.May include in the pleated structure 1-1,1-2 in Fig. 1,
One or more fold structures shown in 1-3,1-4,1-5.
Then the heat-conducting layer after taking two layers or more of above-mentioned creped, setting stacked on top of one another, and horizontal compacting, make phase
The pleated structure of adjacent heat-conducting layer is mutually nested, obtains the heat-conducting article.
The mutually nested pleated structure for referring to the heat-conducting layer is filled into the pleated structure of adjacent heat conductive layers, and is passed through
Level is suppressed, and the tight structure of concave-convex wedging is formed, and is played gap between reducing fold and is moved each other from spatially mutually limiting
Effect.
In the utility model, the pleated structure of formation has antiform fold structure and to shape fold structure, respectively with it is upper
Layer, the pleated structure of lower layer are nested, and such multilayered structure is nested with one another the heat-conducting article to be formed, and has better stability.
Horizontal compacting in the utility model is equal to and applies pressure progress lateral extrusion in the horizontal direction.
The horizontal pressure force is 5~15MPa, it is preferred that is 7~13MPa, it is further preferred that being 9~11MPa.
In some specific embodiments of the utility model, by 2~8 layers of above-mentioned heat-conducting layer setting stacked on top of one another.
In some specific embodiments of the utility model, by 2 layers, 3 layers or 4 layers above-mentioned heat-conducting layer setting stacked on top of one another.
I.e. the number of plies of plicated layer is 2~8 layers, preferably 2,3 or 4 layers.
When heat-conducting layer is 2 layers, the heat-conducting article is upper layer and lower layer structure.
When heat-conducting layer is 3 layers, the heat-conducting article is upper, middle and lower three-decker.
When the number of plies is greater than 3 layers, setting in the above way stacked on top of one another.
In the utility model, after heat-conducting layer setting stacked on top of one another, the pleated structure relative position of adjacent heat-conducting layer is wrapped
It includes and is stacked, is i.e. the pleated structure of heat-conducting layer is filled into the pleated structure of adjacent heat conductive layers.
In some specific embodiments of the utility model, the pleated structure one-to-one correspondence of adjacent two layers heat-conducting layer is stacked,
I.e. a fold is filled into a fold of adjacent layer, and schematic diagram is as shown in the 2a in Fig. 2.
In the other specific embodiment of the utility model, multiple folds of heat-conducting layer can be filled into adjacent thermally conductive
In one fold of layer, schematic diagram is as shown in the 2b in Fig. 2.
In some specific embodiments of the utility model, there is gap, i.e. nested fold between the adjacent heat conductive layers
Structure interlayer has certain distance, is formed and the consistent interlayer of heat-conducting layer crimp shape.
In some specific embodiments of the utility model, the gap is more than or equal to 0.1 micron, i.e., adjacent two layers are thermally conductive
The distance of interlayer or the thickness of interlayer are more than or equal to 0.1 micron.
In some specific embodiments of the utility model, the gap is more than or equal to 0.1 micron, and it is micro- to be less than or equal to 100
Rice.
In some specific embodiments of the utility model, the gap is greater than 10 microns, less than 100 microns.
In some specific embodiments of the utility model, the gap is greater than 10 microns, less than 50 microns.
In some specific embodiments of the utility model, the gap is continuous, i.e., the adjacent thermally conductive interlayer in space
With a continuous air boundary in space, alternatively referred to as air interlayer.
In some specific embodiments of the utility model, two layers of stratiform pleated structure heat conductive pad provided by the utility model
Sectional side view it is as shown in Figure 3, wherein 301 and 302 respectively indicate heat-conducting layer, the gap between heat-conducting layer as shown in 303, be pleat
The interface that wrinkle structure is nested to form.
In the other specific embodiment of the utility model, provided by the utility model three layer by layer shape pleated structure lead
The sectional side view of heat pad is as shown in Figure 4, wherein 401,402 and 403 respectively indicate the heat-conducting layer of stratiform pleated structure, heat-conducting layer it
Between gap as shown in 404 and 405, the interface that is nested to form for pleated structure.
The utility model is stacked on top of one another by two layers or more of the above-mentioned heat-conducting layer with stratiform pleated structure, then using each
After the horizontal pressure force in a direction carries out lateral extrusion, the pleated structure of difference interlayer is mutually nested up and down.It can be from spatially phase
The movement of mutual nonsequent fold, to inhibit the rebound of fold caused by internal stress and structural instability resulting from, together
When reduce the gap occurred between fold and thus bring interface resistance, also retain the compressibility energy of material.
In some specific embodiments of the utility model, the heat-conducting article is specially heat conductive pad.
Above-mentioned heat-conducting article can be also used for preparing the thermally conductive product in other downstreams well known to those skilled in the art, such as soaking
Piece, heat dissipation film etc., the utility model is to this and is not limited.
Above-mentioned heat-conducting article or above-mentioned heat conductive pad can be applied between pcb board, between pcb board and casing, power device with
It between casing, or is pasted on chip, is used as radiator.
The experimental results showed that interface resistance of the heat conductive pad provided by the present application under 50psi pressure is less than 0.14 Kcm2/
W, thermal coefficient are 16W/mK or more.
The utility model additionally provides the preparation method of above-mentioned heat-conducting article, comprising the following steps:
By two layers or more of heat-conducting layer, setting stacked on top of one another, the heat-conducting layer has stratiform pleated structure, then applies water
Concora crush power carries out horizontal compacting, keeps the pleated structure of adjacent heat conductive layers mutually nested.
The creped method of the heat-conducting layer is same as above, and details are not described herein.
In order to further illustrate the utility model, below with reference to embodiment to nested multilayer layer provided by the utility model
Shape pleated structure heat-conducting article and heat conductive pad are described in detail.
Embodiment 1
Will be Nian Jie with the elastomer after stretching with a thickness of 150 microns of graphene paper, after elastomer discharges pulling force retraction, stone
Black alkene paper bounces back with the retraction of elastomer, and graphene paper is separated with elastomer, obtains the stone with stratiform pleated structure
Black alkene paper.
Measured by calibrator, the graphene paper of the stratiform pleated structure with a thickness of 900 microns.Therefore, stratiform knot
The ratio between the thickness of structure and the height of pleated structure are 1:6, and pleated structure is mutually nested after being conducive to multiple-layer stacked.
Two above-mentioned graphene papers with stratiform pleated structure are coincided with the upper and lower into placement, are applied along each horizontal direction
The pressure of 10Mpa, it is mutually nested by two layers of graphene stratiform pleated structure to get arriving to be compressed into the block of 37mm*37mm
Heat conductive pad.
Its sectional side view is as shown in Figure 3.
It is shot by the section of the electron microscope heat conductive pad mutually nested to two layers of graphene stratiform pleated structure,
Upper layer and lower layer graphene stratiform pleated structure is mutually nested；There are the continuous width in space to be greater than 10 microns between nested fold
The interface in accordion.
Using the DRL-III type heat conduction coefficient tester of Xiang Tan Xiang Yi Instrument Ltd. to above-mentioned graphene stratiform fold
Structure heat conductive pad is tested, and the interface resistance under 50psi pressure is 0.07Kcm2/ W, thermal coefficient 32W/mK.
The same above-mentioned heat conductive pad mutually nested by two layers of graphene stratiform pleated structure is made, is placed 24 hours, it is right
Its stability is tested, it can be seen that significant change does not occur for the shape and size of heat conductive pad.
Using the DRL-III type heat conduction coefficient tester of Xiang Tan Xiang Yi Instrument Ltd. to above-mentioned graphene stratiform fold
Structure heat conductive pad standing is tested afterwards for 24 hours, and the interface resistance under 50psi pressure is 0.07Kcm2/ W, thermal coefficient are
32W/mK, there is no significant changes for heating conduction.
30mm* is cut into bicker by two layers of mutually nested heat conductive pad of graphene stratiform pleated structure by above-mentioned
The square of 30mm.As can be seen that the edge of a knife is neat, heat conductive pad shape and size all meet the requirements.
Embodiment 2
Will be Nian Jie with the elastomer after stretching with a thickness of 50 microns of hexagonal boron nitride paper, elastomer discharges pulling force retraction
Afterwards, hexagonal boron nitride paper bounces back with the retraction of elastomer, and hexagonal boron nitride paper is separated with elastomer, is obtained with stratiform
The hexagonal boron nitride paper of pleated structure.
Measured by calibrator, the hexagonal boron nitride paper of the stratiform pleated structure with a thickness of 1000 microns.Therefore, layer
The ratio between the thickness of shape structure and the height of pleated structure are 1:20, and pleated structure is mutually nested after being conducive to multiple-layer stacked.
Three above-mentioned hexagonal boron nitride paper with stratiform pleated structure are coincided with the upper and lower into placement, are applied along each horizontal direction
The pressure for adding 10Mpa is compressed into the block of 37mm*37mm to get to by three layers of hexagonal boron nitride stratiform pleated structure phase
Mutually nested heat conductive pad.
Its sectional side view is as shown in Figure 4.
It is carried out by the section of the electron microscope heat conductive pad mutually nested to three layers of hexagonal boron nitride stratiform pleated structure
Shooting, it is obvious that adjacent hexagonal boron nitride stratiform pleated structure is mutually nested；There are spaces between nested fold
Continuous width is greater than 10 microns of the interface in accordion.
Using the DRL-III type heat conduction coefficient tester of Xiang Tan Xiang Yi Instrument Ltd. to above-mentioned hexagonal boron nitride stratiform
Pleated structure heat conductive pad is tested, and the interface resistance under 50psi pressure is 0.14Kcm2/ W, thermal coefficient 16W/
mK。
The same above-mentioned heat conductive pad mutually nested by three layers of hexagonal boron nitride stratiform pleated structure is made, it is small to place 24
When, its stability is tested, significant change does not occur for the shape and size of heat conductive pad.
Using the DRL-III type heat conduction coefficient tester of Xiang Tan Xiang Yi Instrument Ltd. to above-mentioned hexagonal boron nitride stratiform
Pleated structure heat conductive pad standing is tested afterwards for 24 hours, and the interface resistance under 50psi pressure is 0.14Kcm2/ W, thermally conductive system
Number is 16W/mK, and there is no significant changes for heating conduction.
30mm* is cut into bicker by three layers of mutually nested heat conductive pad of hexagonal boron nitride stratiform pleated structure by above-mentioned
The square of 30mm, it can be seen that the edge of a knife is neat, and heat conductive pad shape and size all meet the requirements.
Embodiment 3
Will be Nian Jie with the elastomer after stretching with a thickness of 150 microns of graphene paper, after elastomer discharges pulling force retraction, stone
Black alkene paper bounces back with the retraction of elastomer, and graphene paper is separated with elastomer, obtains the stone with stratiform pleated structure
Black alkene paper.
Measured by calibrator, the graphene paper of the stratiform pleated structure with a thickness of 900 microns.Therefore, stratiform knot
The ratio between the thickness of structure and the height of pleated structure are 1:6, and pleated structure is mutually nested after being conducive to multiple-layer stacked.
Four above-mentioned graphene papers with stratiform pleated structure are coincided with the upper and lower into placement, are applied along each horizontal direction
The pressure of 10Mpa, it is mutually nested by four layers of graphene stratiform pleated structure to get arriving to be compressed into the block of 37mm*37mm
Heat conductive pad.
It is shot by the section of the electron microscope heat conductive pad mutually nested to four layers of graphene stratiform pleated structure,
It is obvious that adjacent graphene stratiform pleated structure is mutually nested；It is continuously wide that there are spaces between nested fold
Degree is greater than 10 microns of the interface in accordion.
Using the DRL-III type heat conduction coefficient tester of Xiang Tan Xiang Yi Instrument Ltd. to above-mentioned graphene stratiform fold
Structure heat conductive pad is tested, and the interface resistance under 50psi pressure is 0.1Kcm2/ W, thermal coefficient 22W/mK.
The same above-mentioned heat conductive pad mutually nested by four layers of graphene stratiform pleated structure is made, is placed 24 hours, it is right
Its stability is tested, and significant change does not occur for the shape and size of heat conductive pad.
Using the DRL-III type heat conduction coefficient tester of Xiang Tan Xiang Yi Instrument Ltd. to above-mentioned four layers of graphene stratiform
Pleated structure heat conductive pad standing is tested afterwards for 24 hours, and the interface resistance under 50psi pressure is 0.1Kcm2/ W, thermal coefficient
For 22W/mK, there is no significant changes for heating conduction.
30mm* is cut into bicker by four layers of mutually nested heat conductive pad of graphene stratiform pleated structure by above-mentioned
The square of 30mm, it can be seen that the edge of a knife is neat, and heat conductive pad shape and size all meet the requirements.
Embodiment 4
Will be Nian Jie with the elastomer after stretching with a thickness of 150 microns of graphene paper, after elastomer discharges pulling force retraction, stone
Black alkene paper bounces back with the retraction of elastomer, and graphene paper is separated with elastomer, obtains the stone with stratiform pleated structure
Black alkene paper.
Measured by calibrator, the graphene paper of the stratiform pleated structure with a thickness of 900 microns.Therefore, stratiform knot
The ratio between the thickness of structure and the height of pleated structure are 1:6, and pleated structure is mutually nested after being conducive to multiple-layer stacked.
Five above-mentioned graphene papers with stratiform pleated structure are coincided with the upper and lower into placement, are applied along each horizontal direction
The pressure of 10Mpa, it is mutually nested by five layers of graphene stratiform pleated structure to get arriving to be compressed into the block of 37mm*37mm
Heat conductive pad.
It is shot by the section of the electron microscope heat conductive pad mutually nested to five layers of graphene stratiform pleated structure,
It is obvious that adjacent graphene stratiform pleated structure is mutually nested；It is continuously wide that there are spaces between nested fold
Degree is greater than 10 microns of the interface in accordion.
Using the DRL-III type heat conduction coefficient tester of Xiang Tan Xiang Yi Instrument Ltd. to above-mentioned graphene stratiform fold
Structure heat conductive pad is tested, and the interface resistance under 50psi pressure is 0.11Kcm2/ W, thermal coefficient 20W/mK.
The same above-mentioned heat conductive pad mutually nested by five layers of graphene stratiform pleated structure is made, is placed 24 hours, it is right
Its stability is tested, and significant change does not occur for the shape and size of heat conductive pad.
Using the DRL-III type heat conduction coefficient tester of Xiang Tan Xiang Yi Instrument Ltd. to above-mentioned five layers of graphene stratiform
Pleated structure heat conductive pad standing is tested afterwards for 24 hours, and the interface resistance under 50psi pressure is 0.11Kcm2/ W, thermally conductive system
Number is 20W/mK, and there is no significant changes for heating conduction.
30mm* is cut into bicker by five layers of mutually nested heat conductive pad of graphene stratiform pleated structure by above-mentioned
The square of 30mm, it can be seen that the edge of a knife is neat, and heat conductive pad shape and size all meet the requirements.
Comparative example 1
Will be Nian Jie with the elastomer after stretching with a thickness of 150 microns of graphene paper, after elastomer discharges pulling force retraction, stone
Black alkene paper bounces back with the retraction of elastomer, and graphene paper is separated with elastomer, obtains the stone with stratiform pleated structure
Black alkene paper.Measured by calibrator, the graphene paper of the stratiform pleated structure with a thickness of 900 microns.Therefore, layer structure
Thickness and the ratio between the height of pleated structure be 1:6.
The horizontal pressure force that the above-mentioned graphene paper all directions with stratiform pleated structure are applied with 10Mpa, is suppressed
At the block of 37mm*37mm, i.e. acquisition single-layer graphene stratiform pleated structure heat conductive pad, can be clearly seen that, mono-layer graphite
There are biggish gap between the pleated structure of alkene stratiform pleated structure heat conductive pad, air is full of in gap.Use Xiang Tan Hunan instrument
The DRL-III type heat conduction coefficient tester of Instrument Ltd. surveys above-mentioned single-layer graphene stratiform pleated structure heat conductive pad
Examination, interface resistance under 50psi pressure are 0.3Kcm2/W, thermal coefficient 9.8W/mK, and heating conduction is significantly worse than
The mutually nested heat conductive pad (embodiment 1) of two layers of graphene stratiform pleated structure of the same size of identical preparation method.
Make the heat conductive pad of same above-mentioned single-layer graphene stratiform pleated structure, place 24 hours, to its stability into
Row test, it can be seen that after standing for 24 hours, significant change occurs for heat conductive pad shape and size.Use the limited public affairs of Xiang Tan Hunan instrument instrument
The DRL-III type heat conduction coefficient tester of department tests above-mentioned single-layer graphene stratiform pleated structure heat conductive pad,
Interface resistance under 50psi pressure is 0.44 Kcm2/W, and thermal coefficient 7.5W/mK, heating conduction before placing 24 hours than sending out
It has given birth to and has been decreased obviously.
The square that above-mentioned single-layer graphene stratiform pleated structure heat conductive pad is cut into 30mm*30mm with bicker, can
To find out, heat conductive pad shape and size are not all reached requirement.
By above-described embodiment and comparative example it is found that heat conductive pad of the utility model using nested method preparation, interface heat
Resistance is smaller, and thermal conductivity is higher, and performance is more stable.
The method and its core concept of the above embodiments are only used to help understand the utility model.It should refer to
It out, for those skilled in the art, without departing from the principle of this utility model, can also be to this
Some improvement and modification can also be carried out for utility model, these improvement and modification also fall into the protection scope of the utility model claims
It is interior.
Claims (8)
1. a kind of nested multilayer laminar pleated structure heat-conducting article, which is characterized in that by two layers or more, setting stacked on top of one another
Heat-conducting layer composition, the heat-conducting layer has stratiform pleated structure, and the pleated structure of adjacent heat conductive layers is mutually nested.
2. heat-conducting article according to claim 1, which is characterized in that described mutually nested to set for heat-conducting layer is stacked on top of one another
It sets, and horizontal compacting, the nested structure of formation.
3. heat-conducting article according to claim 2, which is characterized in that the pressure of the horizontal compacting is 5~15MPa.
4. heat-conducting article according to claim 1, which is characterized in that have gap between the adjacent heat conductive layers.
5. heat-conducting article according to claim 4, which is characterized in that the gap is more than or equal to 0.1 micron, is less than or equal to
100 microns.
6. heat-conducting article according to claim 1, which is characterized in that the heat-conducting layer is high thermal conductivity two dimension micro Nano material
Layer.
7. heat-conducting article according to claim 1, which is characterized in that in the heat-conducting layer, the fold height of pleated structure
It is 1~20 times of heat-conducting layer thickness.
8. described in any item heat-conducting articles according to claim 1~7, which is characterized in that the heat-conducting article is heat conductive pad.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111263568A (en) * | 2020-01-22 | 2020-06-09 | Oppo广东移动通信有限公司 | Heat dissipation material, preparation method thereof and electronic equipment |
| CN113997647A (en) * | 2020-07-28 | 2022-02-01 | Oppo广东移动通信有限公司 | Composite heat-conducting shielding material, preparation method and electronic equipment |
-
2018
- 2018-06-15 CN CN201820931490.0U patent/CN209052623U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111263568A (en) * | 2020-01-22 | 2020-06-09 | Oppo广东移动通信有限公司 | Heat dissipation material, preparation method thereof and electronic equipment |
| CN111263568B (en) * | 2020-01-22 | 2022-03-11 | Oppo广东移动通信有限公司 | Heat dissipation material, preparation method thereof and electronic equipment |
| CN113997647A (en) * | 2020-07-28 | 2022-02-01 | Oppo广东移动通信有限公司 | Composite heat-conducting shielding material, preparation method and electronic equipment |
| CN113997647B (en) * | 2020-07-28 | 2024-01-05 | Oppo广东移动通信有限公司 | Composite heat conduction shielding material, preparation method and electronic equipment |
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