CN105142380A - Natural graphite/aluminium composite radiating fin and preparation method thereof - Google Patents
Natural graphite/aluminium composite radiating fin and preparation method thereof Download PDFInfo
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- CN105142380A CN105142380A CN201510582531.0A CN201510582531A CN105142380A CN 105142380 A CN105142380 A CN 105142380A CN 201510582531 A CN201510582531 A CN 201510582531A CN 105142380 A CN105142380 A CN 105142380A
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Abstract
The present invention provides a natural graphite/aluminium composite radiating fin and a preparation method thereof, relating to the field of heat radiation of heating elements of electronic products and the field of electromagnetic shielding of electronic products. The natural graphite/aluminium composite radiating fin includes an aluminum foil layer and graphite layers located on two faces of the aluminum foil layer. The aluminum foil layer includes an aluminium base material and coarsening layers located on two faces of the aluminium base material. Holes are distributed on the surface of the coarsening layer. The coarsening layer connects the graphite layer in an occlusion manner. The preparation method includes the steps as follows: pre-processing the surface of the aluminium foil; performing a coarsening process for the aluminium foil; stacking expanded worm-like graphite evenly and tiling the expanded work-like graphite on the aluminium foil; and performing staged rolling to obtain the natural graphite/ aluminium composite radiating fin. The graphite layer connects the aluminium foil layer in an occlusion manner through holes so that the interface resistance of the aluminium foil and the graphite is lesser and the thermal conductivity in the Z-axis direction is increased greatly, the radiating fin has the excellent thermal conducting property and the excellent electromagnetic shielding effect, the radiating fin has the anti-stretching property, and the radiating fin can be bended for 180 degrees.
Description
Technical field
The present invention relates to heat radiation and the electromagnetic shielding field of the heat generating component of electronic product, particularly relate to a kind of native graphite/aluminium heat sink compound and preparation method thereof.
Background technology
Current CPU generates heat because of high-speed cruising, and CPU high-speed cruising is processing speed for improving its equipment and researches and develops.Mobile phone, flat computer, the demand of notebook and TV and display screen use amount increase, the demand of display screen high brightness makes light-emitting diode use amount increase, but because light-emitting diode uses more, its power consumption increases, this also adds the caloric value of large equipment, battery power consumption increases simultaneously, battery capacity also needs and then to improve, and makes display apparatus generate heat many, as effectively do not controlled heating because consuming energy large, not only high temperature can make CPU running Yin Gaore and when machine goes wrong or loss of function, also can make heat-producing device shortening in useful life.Display apparatus function increases now simultaneously, and use part also diversified, quantity is many and volume is less, mobile phone, the equipment such as flat computer are because of more and more miniaturized, and its free space is not enough, the distance of each part and assembly is nearer, is easy to mutual electromagnetic interference occurs.
In the market as radiative material electrographite thickness take as the leading factor with 25 μm, the electrographite of 40 μm can reach volume production, but conductive coefficient is not good, the electrographite of 70 μm can production not high, the thickness limits heat dispersion of electrographite, more caloric requirement solves, and in order to heat is reached from heat generating component " A " some the temperature that other point distributed and then reduced heat generating component, the body temperature of heat generating component " A " is significantly reduced.Therefore the heat conduction carrier of more high thermal conductivity coefficient and larger heat-sinking capability is needed.
Summary of the invention
The present invention provides a kind of native graphite/aluminium heat sink compound and preparation method thereof in order to solve the problems of the technologies described above, be the heat conduction carrier with excellent heat-conducting effect, also can provide the function of electromagnetic shielding.
A kind of native graphite/aluminium heat sink compound, it comprises aluminium foil layer and is positioned at the graphite linings of aluminium foil layer upper and lower surface; Described aluminium foil layer comprises aluminium base and is positioned at the roughened layer of aluminium base upper and lower surface; The surface uniform of described roughened layer is distributed with hole; Described roughened layer by hole and graphite linings engaged.
Described aluminium base, roughened layer and hole are integrated.
The thickness of described native graphite/aluminium heat sink compound is 28 μm ~ 2100 μm; The thickness of described aluminium foil layer is 8 μm ~ 100 μm; The surface area of described roughened layer is 3 ~ 8 times of aluminium base; Described graphite linings thickness is 10 μm ~ 1000 μm.
Described native graphite/aluminium heat sink compound is an Institutional Layer with graphite linings/aluminium foil layer/graphite linings, can form the structure of maximum 10 Institutional Layer compounds.
Described aluminium foil layer is web-like aluminium foil; Described graphite linings is suppress after expanded worm graphite is laid in aluminium foil layer to form.
A preparation method for native graphite/aluminium heat sink compound, specifically carries out according to the following steps:
One, preliminary treatment is carried out to aluminium foil surface, the pollution of removing aluminium foil surface and oxide layer;
Two, the aluminium foil obtained is processed to step one and carry out roughening treatment, make to be formed at aluminium foil surface to be uniformly distributed pertusate roughened layer;
Three, expanded worm graphite piled up uniformly and be laid on the aluminium foil that obtains through step 2 process; Then, through stage calendering, namely obtain native graphite/aluminium heat sink compound.
Pretreated method in described step one, is specially: carry out oil removing, washing, washing, washing and oven dry successively to aluminium foil; What described oil removing adopted is neutral degreaser agent; What described washing adopted is neutral lotion.
The processing method of described step 2 is specially: roughening treatment: the aluminium foil anode oxidation method that step one obtains or sand-blast make surface coarsening, namely pertusate roughened layer is being uniformly distributed in aluminium foil surface formation, then, carry out cleaning and drying and processing, then rolling is carried out to aluminium foil.
The preparation method of the expanded worm graphite of described step 3: after expanded graphite granule is warmed to 850 ~ 1040 DEG C, can be puffed to worm graphite, after being then separated through to suspend for 2 ~ 7 times, obtains the expanded worm graphite that purity is more than 99%; Wherein, the volume of worm graphite is 60 ~ 100 times of the volume of graphite granule.
Described step 3 concrete operation method is: be deposited in by expanded worm graphite on the aluminium foil obtained through step 2 process, then flatten, obtain the expanded myrmekite layer of ink of the uniform consistency of thickness of initial density, then, carry out first time calendering, pressure is 500 ~ 2000kg, makes expanded worm graphite-filled and is expressed in the gap of hole; Carry out second time calendering, pressure is 3000 ~ 6000kg, makes the density of expanded myrmekite layer of ink bring up to 0.4 ~ 0.5g/cm
3; Third time calendering, pressure is 8000 ~ 20000kg, makes the density of expanded myrmekite layer of ink bring up to 0.8 ~ 1g/cm
3; 4th calendering, pressure is 40000 ~ 70000kg, makes the density of expanded myrmekite layer of ink bring up to 1.2 ~ 1.4g/cm
3, now expanded myrmekite layer of ink has changed the state of film forming; 5th calendering, pressure is 90000 ~ 200000kg, makes the density of expanded myrmekite layer of ink bring up to 1.6 ~ 1.8g/cm
3, now graphite has metallic luster.
Described calendering mode is specially roll extrusion.
Advantage of the present invention: the mode that one, a kind of native graphite of the present invention/aluminium heat sink compound adopts graphite linings and aluminium foil layer to be mutually engaged by hole, the thermal conductivity of Z-direction is improved greatly, make the heat conductivility of fin excellent, conductive coefficient is 400W/mK ~ 1200W/mK, and thermal diffusion coefficient is up to 200mm
2/ s ~ 700mm
2/ s; Due to adding of aluminium base, also there is excellent effectiveness, make each assembly in mini-plant effectively can prevent electromagnetic interference; Two, a kind of native graphite/aluminium heat sink compound of the present invention, stretch-proof, has very high mechanical property by bent 180 degree; Three, the preparation method of a kind of native graphite/aluminium heat sink compound of the present invention, by the mode of stage calendering, graphite and aluminium foil in fin can be better interlocked, and the hole that can not damage on aluminium foil layer, the adhesive force of aluminium foil and graphite is increased greatly, make the interface resistance of aluminium foil and graphite less, improve heat conductivility.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of native graphite/aluminium heat sink compound of embodiment;
Fig. 2 is the enlarged diagram of the aluminium foil layer of a kind of native graphite/aluminium heat sink compound of embodiment;
Wherein, 1-aluminium foil layer, 11-aluminium base, 12-roughened layer, 13-hole, 2-graphite linings.
Embodiment
In order to deepen the understanding of the present invention, be described in further detail the present invention below in conjunction with drawings and Examples, this embodiment, only for explaining the present invention, not forming protection scope of the present invention and limiting.
Embodiment
The preparation method of a kind of native graphite/aluminium heat sink compound, specifically carry out according to the following steps: 1, the two surface treatment of aluminium foil, aluminium foil must carry out preliminary treatment before roughening treatment, because aluminium foil contacts with air, hand and other handbarrow in the storage process, handling process of transport, easily be subject to the pollution such as grease and salt, so by neutral degreaser agent and neutral lotion-treated; 2, available anode oxidation method or sand-blast make surface coarsening, rear rolling is cleaned in alligatoring again, now want light during rolling aluminium foil, too not tight, in order to avoid the roughened layer of deface, the aluminium foil after alligatoring will carry out clean solution and drying and processing, it is made to keep stability in a period of time, now want light during rolling aluminium foil, too not tight, in order to avoid the roughened layer of deface; 3, graphite granule that can be expanded is being warmed to 850 ~ 1040 DEG C, make the expanded worm graphite to more than 60 ~ 100 times of graphite granule, worm graphite after expanded is very light, comparatively pure worm graphite is isolated by outstanding fraction, as highly purified worm graphite will be obtained, having to pass through suspends for 2 ~ 3 times is separated, and even repeatedly suspend separation, with the purity (removing sulphur, sulfide, tiny stone etc. wherein) making worm graphite reach more than 99%; 4, highly purified worm graphite is stacked on aluminium foil the thickness of needs, control accumulation horizon density well simultaneously, flatten again, reach and eliminate the uneven problem of ulking thickness, and then obtain the myrmekite layer of ink that just more even cotton-shaped worm graphite relative thickness of density is consistent, for stage calendering provides the foundation; 5, in order to improve the aluminium foil bonding strength after expanded worm graphite and alligatoring, allowing worm graphite enter in the hole after alligatoring simultaneously, and tamping, thus taking the pattern of stage calendering.During first time calendering, worm graphite and graphite linings isodensity enter in hole, and now pressure is little, is just doing the action extruded, and play a part to fill extruding; Second time calendering brings up to 0.4 ~ 0.5g/cm density
3left and right is still now thick pressure, to precision without special requirement; Third time calendering makes density be increased to 0.8 ~ 1g/cm
3left and right, now worm graphite will enter the state of the graphite film of low temperature; 4th time calendering density is increased to 1.2 ~ 1.4g/cm
3left and right, the film forming completely of worm graphite now, and there is thermal conductivity, conductive coefficient significantly improves, and the physical property of graphite also embodies to some extent, and thermal diffusion coefficient tentatively embodies; 5th calendering, makes the density of the graphite linings of composite wood reach 1.6 ~ 1.8g/cm
3, even higher, the graphite on two sides has the light quality of metal (pool), and conductive coefficient reaches peak, and thermal diffusion coefficient is also very stable.Now have high requirement to calendering, the tolerance of thickness is 1 μm, and the cylinder of calendering is Stainless Steel material, and pressure is 200000kg.Effective control because of thickness makes the alumina particles of alligatoring without impact, and the density of graphite can reach 1.8g/cm
3left and right.
As depicted in figs. 1 and 2, native graphite/aluminium heat sink compound that the preparation method of a kind of native graphite/aluminium heat sink compound of the present embodiment prepares, it comprises aluminium foil layer 1 and is positioned at the graphite linings 2 of aluminium foil layer 1 upper and lower surface; Described aluminium foil layer 1 comprises aluminium base 11 and is positioned at the roughened layer 12 of aluminium base upper and lower surface; The surface uniform of described roughened layer 12 is distributed with hole 13; Described roughened layer 12 is engaged by hole 13 and graphite linings 2; The thickness of described native graphite/aluminium heat sink compound is 28 μm ~ 2100 μm; The thickness of described aluminium foil layer 1 is 8 μm ~ 100 μm; The surface area of described roughened layer 12 is 3 ~ 8 times of aluminium base 11; Described graphite linings 2 thickness is 10 μm ~ 1000 μm.
Hole on the aluminium foil layer of the present embodiment, can not only increase surface area, and the attachment of aluminium and graphite can also be made tightr, aluminium surface irregularity after alligatoring, surface area is very big, and hole distribution is at random, void shape is different, graphite can not come off and bend resistance because of hole grip
Graphite linings described in the present embodiment is suppress after expanded worm graphite is laid in aluminium foil layer to form; Cotton-shaped worm shape graphite after expanded, be laid in aluminium base surface, through roll extrusion several times, cotton-shaped graphite granule is slowly pressed between the hole on aluminium surface, compress into the graphite of hole because extruding the very fine and close of change, until and the snap-in force of aluminium be greater than snap-in force between graphite linings and graphite linings, thus add the adhesive force between graphite linings and aluminium base.
The pattern of the stage calendering described in the present embodiment from graphite worm state, is transformed into high-density state according to graphite linings, because of various different density requirements and thickness requirement, applies, with different rolling pressures, to compress when rolling times.
Native graphite described in the present embodiment/aluminium heat sink compound can adjust thickness arbitrarily in different demand, adjusts arbitrarily in technique tolerance band, to reach the requirement of different application aspect; Be that a unit number of plies can adjust thickness arbitrarily in different demand with graphite linings/aluminium foil layer/graphite linings, in technique tolerance band, be adjusted to maximum 10 layers, to reach the requirement of different application aspect.
In the present embodiment, graphite linings enters in hole that aluminium foil layer distributes in Z-direction, utilize each characteristic identical to conductive coefficient of aluminium, after graphite linings enters hole, not only strengthen the adhesive force difficult drop-off of graphite and aluminium, adding more because of aluminium, Z-direction thermal conduction characteristic by aluminium compensate for the not good shortcoming of graphite linings Z-direction thermal conduction characteristic, and the Z-direction heat conduction of whole heat sink compound was improved because of adding of aluminium.
Native graphite/aluminium the heat sink compound of the present embodiment, conductive coefficient is 400W/mK ~ 1200W/mK, and thermal diffusion coefficient is 200mm
2/ s ~ 700mm
2/ s; Because of adding of aluminium in heat sink compound, can fix with metal bolts in device assembles and be connected with ground terminal, and because of aluminium conductive characteristic form grounded circuit, and fin covers on the chip of equipment, directly cover the most disturbed chip, forming the best anti-High-frequency Interference ability of electromagnetic shielding effect is 60 ~ 80db (10MHz ~ 1GHz); Because of adding of aluminium base, the tension failure value in its X-Y direction (horizontal direction) is 50Kgf/mm
2~ 100Kgf/mm
2, being 50 times of current condition of equivalent thickness graphite flake, is 5 times of current condition of equivalent thickness electrographite sheet; No matter composite sheet thickness is how many, its bent angle is 180 degree, bent number of times is 50 times, and the fracture of native graphite/aluminium heat sink compound can not be made and cause heat dissipation to reduce, this be single graphite heat radiation fin cannot bear be greater than 90 degree bend and cannot bear repeatedly bend incomparable.
Above-described embodiment should not limit the present invention by any way, and the technical scheme that the mode that all employings are equal to replacement or equivalency transform obtains all drops in protection scope of the present invention.
Claims (10)
1. native graphite/aluminium heat sink compound, is characterized in that: it comprises aluminium foil layer and is positioned at the graphite linings of aluminium foil layer upper and lower surface; Described aluminium foil layer comprises aluminium base and is positioned at the roughened layer of aluminium base upper and lower surface; The surface uniform of described roughened layer is distributed with hole; Described roughened layer by hole and graphite linings engaged.
2. a kind of native graphite/aluminium heat sink compound according to claim 1, is characterized in that: described aluminium base, roughened layer and hole are integrated.
3. a kind of native graphite/aluminium heat sink compound according to claim 1, is characterized in that: the thickness of described native graphite/aluminium heat sink compound is 28 μm ~ 2100 μm; The thickness of described aluminium foil layer is 8 μm ~ 100 μm; The surface area of described roughened layer is 3 ~ 8 times of aluminium base; Described graphite linings thickness is 10 μm ~ 1000 μm.
4. a kind of native graphite/aluminium heat sink compound according to claim 1, is characterized in that: described native graphite/aluminium heat sink compound is an Institutional Layer with graphite linings/aluminium foil layer/graphite linings, can form the structure of maximum 10 Institutional Layer compounds.
5. a kind of native graphite/aluminium heat sink compound according to claim 1 or 3, is characterized in that: described aluminium foil layer is web-like aluminium foil; Described graphite linings is suppress after expanded worm graphite is laid in aluminium foil layer to form.
6. the preparation method of a kind of native graphite/aluminium heat sink compound as claimed in claim 1, is characterized in that: preparation method specifically carries out according to the following steps:
One, preliminary treatment is carried out to aluminium foil surface, the pollution of removing aluminium foil surface and oxide layer;
Two, the aluminium foil obtained is processed to step one and carry out roughening treatment, make to be formed at aluminium foil surface to be uniformly distributed pertusate roughened layer;
Three, expanded worm graphite piled up uniformly and be laid on the aluminium foil that obtains through step 2 process; Then, through stage calendering, namely obtain native graphite/aluminium heat sink compound.
7. the preparation method of a kind of native graphite/aluminium heat sink compound according to claim 6, is characterized in that: the pretreated method in described step one, is specially: carry out oil removing, washing, washing, washing and oven dry successively to aluminium foil; What described oil removing adopted is neutral degreaser agent; What described washing adopted is neutral lotion.
8. the preparation method of a kind of native graphite/aluminium heat sink compound according to claim 6, it is characterized in that: the processing method of described step 2 is specially: roughening treatment: the aluminium foil anode oxidation method that step one obtains or sand-blast make surface coarsening, namely pertusate roughened layer is being uniformly distributed in aluminium foil surface formation, then, carry out cleaning and drying and processing, then rolling is carried out to aluminium foil.
9. the preparation method of a kind of native graphite/aluminium heat sink compound according to claim 6, it is characterized in that: the preparation method of the expanded worm graphite of described step 3: can after expanded graphite granule is warmed to 850 ~ 1040 DEG C, be puffed to worm graphite, then, after 2 ~ 7 separation that suspend, the expanded worm graphite that purity is more than 99% is obtained; Wherein, the volume of worm graphite is 60 ~ 100 times of the volume of graphite granule.
10. the preparation method of a kind of native graphite/aluminium heat sink compound according to claim 6, it is characterized in that: described step 3 concrete operation method is: expanded worm graphite is deposited on the aluminium foil obtained through step 2 process, then flatten, obtain the expanded myrmekite layer of ink of the uniform consistency of thickness of initial density, then, carry out first time calendering, pressure is 500 ~ 2000kg, makes expanded worm graphite-filled and is expressed in the gap of hole; Carry out second time calendering, pressure is 3000 ~ 6000kg, makes the density of expanded myrmekite layer of ink bring up to 0.4 ~ 0.5g/cm
3; Third time calendering, pressure is 8000 ~ 20000kg, makes the density of expanded myrmekite layer of ink bring up to 0.8 ~ 1g/cm
3; 4th calendering, pressure is 40000 ~ 70000kg, makes the density of expanded myrmekite layer of ink bring up to 1.2 ~ 1.4g/cm
3, now expanded myrmekite layer of ink has changed the state of film forming; 5th calendering, pressure is 90000 ~ 200000kg, makes the density of expanded myrmekite layer of ink bring up to 1.6 ~ 1.8g/cm
3, now graphite has metallic luster.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105451522A (en) * | 2015-12-23 | 2016-03-30 | 联想(北京)有限公司 | Radiating workpiece and electronic equipment |
| CN106531874A (en) * | 2016-11-30 | 2017-03-22 | 南京劲峰洋光电科技有限公司 | Novel heat dissipation insulating composite material and preparation method therefor |
| CN107660100A (en) * | 2016-07-26 | 2018-02-02 | 现代自动车株式会社 | Graphite member and its manufacture method |
| CN110291039A (en) * | 2017-02-10 | 2019-09-27 | 株式会社钟化 | Graphite film and its manufacturing method |
| CN110857748A (en) * | 2018-08-24 | 2020-03-03 | 王磊 | Interface material layer and manufacturing method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6956739B2 (en) * | 2002-10-29 | 2005-10-18 | Parker-Hannifin Corporation | High temperature stable thermal interface material |
| CN202443965U (en) * | 2011-12-26 | 2012-09-19 | 深圳市爱诺菲科技有限公司 | Metal-graphite composite heat-sink device |
| CN203015365U (en) * | 2012-12-24 | 2013-06-19 | 郑淳展 | Cooling fin |
| CN203446165U (en) * | 2013-05-28 | 2014-02-19 | 绿晶能源股份有限公司 | Composite radiating fin |
| CN104647830A (en) * | 2015-01-30 | 2015-05-27 | 上海交通大学 | High-heat-conductivity graphite film metal block composite material and preparation method of composite material |
| CN204968327U (en) * | 2015-09-14 | 2016-01-13 | 昆山奇华印刷科技有限公司 | Compound fin of natural graphite aluminium |
-
2015
- 2015-09-14 CN CN201510582531.0A patent/CN105142380A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6956739B2 (en) * | 2002-10-29 | 2005-10-18 | Parker-Hannifin Corporation | High temperature stable thermal interface material |
| CN202443965U (en) * | 2011-12-26 | 2012-09-19 | 深圳市爱诺菲科技有限公司 | Metal-graphite composite heat-sink device |
| CN203015365U (en) * | 2012-12-24 | 2013-06-19 | 郑淳展 | Cooling fin |
| CN203446165U (en) * | 2013-05-28 | 2014-02-19 | 绿晶能源股份有限公司 | Composite radiating fin |
| CN104647830A (en) * | 2015-01-30 | 2015-05-27 | 上海交通大学 | High-heat-conductivity graphite film metal block composite material and preparation method of composite material |
| CN204968327U (en) * | 2015-09-14 | 2016-01-13 | 昆山奇华印刷科技有限公司 | Compound fin of natural graphite aluminium |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105451522A (en) * | 2015-12-23 | 2016-03-30 | 联想(北京)有限公司 | Radiating workpiece and electronic equipment |
| CN105451522B (en) * | 2015-12-23 | 2018-06-01 | 联想(北京)有限公司 | A kind of heat dissipation workpiece and electronic equipment |
| CN107660100A (en) * | 2016-07-26 | 2018-02-02 | 现代自动车株式会社 | Graphite member and its manufacture method |
| CN107660100B (en) * | 2016-07-26 | 2020-03-13 | 现代自动车株式会社 | Graphite member and method for producing same |
| US10598445B2 (en) | 2016-07-26 | 2020-03-24 | Hyundai Motor Company | Graphite component and manufacturing method thereof |
| CN106531874A (en) * | 2016-11-30 | 2017-03-22 | 南京劲峰洋光电科技有限公司 | Novel heat dissipation insulating composite material and preparation method therefor |
| CN110291039A (en) * | 2017-02-10 | 2019-09-27 | 株式会社钟化 | Graphite film and its manufacturing method |
| CN110857748A (en) * | 2018-08-24 | 2020-03-03 | 王磊 | Interface material layer and manufacturing method thereof |
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Address after: Suzhou City, Jiangsu province 215314 City Wanan town Kunshan City Week Road No. 368, room 3 Applicant after: Wonder photoelectric (Kunshan) Limited by Share Ltd Address before: Suzhou City, Jiangsu province 215314 City Wanan town Kunshan City Week Road No. 368, room 3 Applicant before: KUNSHAN QIHUA PRINTING TECHNOLOGY CO., LTD. |
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