CN102795617A - Graphite block material and preparation method thereof - Google Patents
Graphite block material and preparation method thereof Download PDFInfo
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- CN102795617A CN102795617A CN2012102573761A CN201210257376A CN102795617A CN 102795617 A CN102795617 A CN 102795617A CN 2012102573761 A CN2012102573761 A CN 2012102573761A CN 201210257376 A CN201210257376 A CN 201210257376A CN 102795617 A CN102795617 A CN 102795617A
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Abstract
The invention discloses a graphite block material and a preparation method thereof. The graphite block material comprises two layers of graphite layer structures, wherein the first layer of graphite layer structure is anisotropic and arranged on the second layer of graphite layer structure; the relative high thermal conductive direction of the first layer of graphite layer structure is parallel to the surface of the second layer of graphite layer structure; and the two layers of graphite layer structures are carbonized to form a whole. The graphite block material is composed of two layers of graphite layer structures, the relative high thermal conductive direction of the first layer of the graphite layer structure is parallel to the surface of the second layer of the graphite layer structure, and the two layers of graphite layer structures are carbonized to form a whole, so that the two structures are almost in 'seamless' contact, the interface thermal resistance is very low, and the heat transfer effect is remarkable. According to the graphite block material, the two structures are arranged and burnt into a whole, so that the internal heat transfer effect of the graphite block material is good, and heat dispersing or heating performance is remarkable.
Description
Technical field
The present invention relates to the preparation method of graphite material and graphite material.
Background technology
Graphite has good heat, electrical property, has widely to use.Say that from microtexture graphite crystal has laminate structure, have anisotropic characteristics, its mechanics, electricity, thermal property all are anisotropic.Thermal conductivity is no exception, and anisotropic graphite material has a high heat conducting direction and vertical with it low heat conduction direction, and wherein high relatively heat conduction direction is the main heat conduction direction of graphite material.The graphite material crystal grain of natural formation is all smaller, and synthetic graphite is not seen the report that the graphite of macro-size monocrystalline is arranged yet, and therefore the graphite material of macroscopic view use all is the polycrystal of graphite, and the inner percent crystallinity that some parts is always arranged, and also is that degree of graphitization is not high.For the polycrystalline graphite material, if the orientation degree of crystallite is not high, or even random alignment, then whole thermal conductivity is not high, generally all below 100W/mK.Have only the high heat conduction direction of adjacent crystal grain parallel to each other or approaching parallel, whole just can have higher thermal conductivity.The graphite material of high heat conduction is because invocation point such as graphite density is low, thermal conductivity is high, price is lower and very application prospects is arranged on thermal management materials.
Being used as heat sink material is an important use field of graphite material, and the heat that needs are left passes through graphite.If yet use graphite material merely, the part that only contacts with thermal source in the graphite material usually can be brought into play radiating effect, and all the other parts that do not contact with thermal source are difficult to bring into play heat dispersion, cause the heat dispersion of graphite material this moment to be difficult to comprehensive performance.On the other hand, because high conduction and high temperature resistant, graphite also is the heating element that a lot of high temperature are used.As heating element, often place a side that is heated parts, and existing graphite material is during as heating element, heat is propagated along all directions, wherein can pass to be heated the finite energy that parts are used to heat, and energy utilization efficiency is lower.
Summary of the invention
Technical problem to be solved by this invention is: remedy the deficiency of above-mentioned prior art, propose a kind of graphite block material and preparation method thereof, the graphite block material that makes is used to dispel the heat or the better performances of adstante febre.
Technical problem of the present invention solves through following technical scheme:
A kind of graphite block material; Comprise two-layer graphite linings structure; Said the first layer graphite linings structural anisotropy; Said the first layer graphite linings structure is arranged on the said second layer graphite linings structure, and the high relatively heat conduction direction of said the first layer graphite linings structure is and the parallel direction of said second layer graphite linings body structure surface that two-layer graphite linings structure forms an integral body after one is burnt till in charing.
Technical problem of the present invention solves through following further technical scheme:
A kind of graphite block preparation methods; May further comprise the steps: anisotropic the first layer graphite linings structure is arranged on the said second layer graphite linings structure, when being provided with the high relatively heat conduction direction of said the first layer graphite linings structure is parallel to the surface of said second layer graphite linings structure; Form an integral body after again one being burnt till in the charing of two-layer graphite linings structure, obtain said graphite block material.
The correlated beneficial effect of the present invention and prior art is:
In graphite block material of the present invention and preparation method thereof; The graphite block material is made up of two-layer graphite linings structure; The high relatively heat conduction direction of the first layer graphite linings structure is and the parallel direction of said second layer graphite linings body structure surface, and two-layer graphite linings structure forms an integral body after charing, and both burn till one and make double-layer structure approximate " seamless " contact; Interface resistance is very low, and heat-transfer effect is remarkable.When being used to dispel the heat like this, second layer graphite linings structure is as heat dissipating layer, and the first layer graphite linings structure on it is dispelled the heat, improved radiating efficiency thereby make the whole surface portion of second layer graphite linings structure all be used to transmit heat through equal thermosphere as equal thermosphere.Be used for adstante febre; Second layer graphite linings structure is as heating layer; The first layer graphite linings structure on it is as thermofin; The heat that can stop heating layer makes the heating layer heat as much as possible towards the parts place direction transmission that needs heating towards deviating from the parts direction transmission that needs heating, improves Btu utilization efficient.Graphite block material of the present invention is provided with double-layer structure, and owing to burn till one, graphite block material internal heat-transfer effect is good, be used to dispel the heat or the improved performance of adstante febre more remarkable.
Description of drawings
Fig. 1 is the structural representation of the graphite block material in the specific embodiment of the invention one;
Fig. 2 is the user mode synoptic diagram of the graphite block material in the specific embodiment of the invention one when being used to dispel the heat;
Fig. 3 is the user mode synoptic diagram that the graphite block material in the specific embodiment of the invention one is used for adstante febre;
Fig. 4 is the section decomposing schematic representation of the graphite block material in the specific embodiment of the invention four;
Fig. 5 is the structural representation of the graphite block material in the specific embodiment of the invention six.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention is explained further details.
As shown in Figure 1; Structural representation for graphite block material in this embodiment; Graphite block material 100 comprises two-layer graphite linings structure, the first layer graphite linings structure A anisotropy, and the first layer graphite linings structure A is arranged on the said second layer graphite linings structure B; And the high relatively heat conduction direction of the first layer graphite linings structure A is and the parallel direction in said second layer graphite linings structure B surface that two-layer graphite linings structure forms an integral body after one is burnt till in charing.High relatively here heat conduction direction is the main heat conduction direction of graphite linings.Graphite linings is in vertical direction, and horizontal direction all has thermal conductivity, like the thermal conductivity far of the vertical direction thermal conductivity greater than horizontal direction, can think that then vertical direction is high relatively heat conduction direction, mainly vertically heat conduction.Similarly,, can think that then horizontal direction is high relatively heat conduction direction, main along continuous straight runs heat conduction like the thermal conductivity far of horizontal direction thermal conductivity greater than vertical direction.Among the figure, be the heat conduction direction of signal the first layer graphite linings structure A, use horizontal line to show its heat conduction direction and be edge and the parallel direction in second layer graphite linings structure B surface.
During preparation, anisotropic the first layer graphite linings structure A is arranged on the second layer graphite linings structure B, when being provided with the high relatively heat conduction direction of the first layer graphite linings structure A is parallel to the surface of second layer graphite linings structure B; Form an integral body after again one being burnt till in the charing of two-layer graphite linings structure, obtain the graphite block material.Specifically can may further comprise the steps: natural flake graphite or the expanded graphite that 1) will be added with sticker are dispersed in and form slurry in the solvent, as the component of the first layer graphite linings structure A; 2) slurry that said step 1) is made is molded directly within on one deck graphite block or the graphite precursor with the method for curtain coating or coating; 3) under being lower than the temperature of said solvent boiling point with said step 2) in be covered with graphite block or the graphite precursor oven dry of slurry, after after the charing two-layer graphite linings structure being burnt till one, form an integral body, obtain said graphite block material and make the graphite block material.Through the method for curtain coating, can make natural flake graphite reach the anisotropy orientation degree higher here, can further improve the soaking effect of heat insulation of the graphite block material that makes than technologies such as hot pressing.
Following be specific examples, combines so that above-mentioned preparation method to be described: 1) petroleum pitch is dissolved in the organic solvent, and the elimination insolubles, the adding natural flake graphite stirs, and the formation slurry is as the component of the first layer graphite linings structure A.2) be molded directly within the high heat conduction charcoal piece surface that is used to dispel the heat to above-mentioned slurry curtain coating that makes or coating with casting method; The charcoal piece is promptly as the component of second layer graphite linings structure B here; Coating thickness is 100 microns, 100 ℃ of oven dry down, and 500 ℃ of charings 3 hours of pressurizeing; Make double-layer structure burn till one, obtain burning till the graphite block material of integrally formed integral body by two-layer graphite linings structure.
As shown in Figure 2, the user mode synoptic diagram when being used to dispel the heat for the graphite block material of the specific embodiment of the invention.When being used to dispel the heat, mainly utilize the second layer graphite linings structure B heat radiation in the graphite block material 100, the parts 200 that need dispel the heat contact with the first layer graphite linings structure A in the graphite block material 100.The high relatively heat conduction direction of the first layer graphite linings structure A is parallel direction along second layer graphite linings structure B surface; Therefore heat in the first layer graphite linings structure A along with the surperficial parallel direction transmission of second layer graphite linings structure B; Thereby can be used as the effect of equal thermosphere performance soaking; Heat is passed to the whole surface portion of second layer graphite linings structure B; Then the whole volume of second layer graphite linings structure B all is used to transmit the heat heat radiation, and no longer only is to have the part that contacts to dispel the heat with thermal component 200, can improve radiating efficiency.
As shown in Figure 3, be used for the user mode synoptic diagram of adstante febre for the graphite block material of the specific embodiment of the invention.Be used for adstante febre; Mainly utilize second layer graphite linings structure B in the graphite block material 100 to receive the parts that heat transferred need be heated behind the external heat; The parts 300 that need add contact with the second layer graphite linings structure B in the graphite block material 100; The high relatively heat conduction direction of the first layer graphite linings structure A is parallel direction along second layer graphite linings structure B surface; Therefore the direction thermal conductivity perpendicular to second graphite linings structure B surface is low; Therefore heat is not easy " penetrating " the first layer graphite linings structure A among the second layer graphite linings structure B, and the first layer graphite linings structure promptly can be used as thermofin, and the heat that can stop heating element (second layer graphite linings structure B) is towards the direction transmission that deviates from the parts 300 that need heating; Make the heating element heat as much as possible towards the parts that need heating 300 place direction transmission, improve Btu utilization efficient.
Above-mentioned; Soaking adds the scheme of heat radiation during heat radiation; And the heat insulation scheme that adds heating of adstante febre, can realize through two-layer graphite linings structure in theory, but the research back is found; Because the interface resistance between the two-layer graphite linings structure is very big, the two-layer heat radiation heating effect that is obtained that improves so only is set promotes very limited.Therefore in this embodiment, the graphite block material is except that comprising above-mentioned two-layer graphite linings structure, and two-layer graphite linings structure also forms an integral body after one is burnt till in charing.Burn till the graphite block material that one obtains; Near seamless connects, and thermal resistance is very little between the double-layer structure interface, and heat-transfer effect is good at the interface; Be used to dispel the heat or the improved performance of adstante febre more remarkable; Meanwhile the graphite block material burns till one through charing, does not also increase process complexity, is the scheme that can be applied to industry.
Preferably, through sticker bonding, form an integral body after burning till one through charing after the bonding between the two-layer graphite linings structure.Sticker can be pitch, mesophase pitch or resol.After increasing after the sticker bonding charing again, intermediate is converted into the raw material of wood-charcoal material, and also can improve interface resistance this moment.Experiment records, and add the graphite block material that burns till one behind the sticker this moment, and the thermal conductivity of the raw material of wood-charcoal material that double-layer structure forms at the interface can reach more than the 80W/mK.Comparatively speaking, at present industry is usually used in improving the heat interfacial materials such as heat-conducting silicone grease, heat conduction pad at hot interface, and the thermal conductivity of the best heat interfacial material of thermal conductivity is also less than 10W/mK at present.And the above thermal conductivity heat-transfer effect of 80W/mK promptly effectively promotes here, and thermal resistance is very little, and heat-transfer effect is good at the interface, be used to dispel the heat or the improved performance of adstante febre more remarkable.
Embodiment two
This embodiment is with the difference of embodiment one: in this embodiment, the thickness of control one deck graphite linings structure A is got 0.01～1 millimeter.
In this embodiment, because the thickness of control the first layer graphite linings structure A is at 0.01～1 millimeter, thinner thickness, thin graphite linings elasticity is better, therefore can make the graphite block material in use keep performance, avoids the generation of situation such as ftractureing.In this scheme, require control graphite linings thickness of structure thinner, the use occasion thin for thickness requirement can be suitable for.
Following is object lesson: prepare common graphite linings, with it as second layer graphite linings structure B, the ethanolic soln of coating film epoxy resin glue or resol in its surface, a bonding then layer thickness is 0.01～1 millimeter, density is greater than 1.7g/cm
3Flexible graphite platelet.Here, flexible graphite platelet is anisotropic graphite, as the first layer graphite linings structure A.During bonding, the high heat conduction direction of soft graphite is along the parallel direction setting in common graphite surface.Under inert atmosphere, slowly be heated to 700 degree then with the charing of two-layer graphite linings structure, the resin glue of filling in the middle of this moment is also by charing, and double-layer structure burns till one and obtains monoblock graphite block material after the charing.In the sintering procedure,, then in carbonization process, pressurize like flexible graphite platelet generation bubbling phenomenon.
Embodiment three
This embodiment is with the difference of embodiment two: in this embodiment; Prepare the first layer graphite linings structure A through isotropy and anisotropic graphite powder; The first layer graphite linings structure A thickness can be obtained thicker, is 0.01～10 millimeter.The thickness of the first layer graphite linings structure A is got 10 millimeters in this embodiment.
In this embodiment; Owing to contain isotropy and anisotropic graphite powder among the first layer graphite linings structure A; Therefore the heat conduction anisotropy degree of graphite linings is low than the anisotropy degree of the graphite linings that is become by the anisotropy graphite powder merely; Difference with second layer graphite linings structure B reduces like this, therefore can avoid equally ftractureing in the use of graphite block material.Simultaneously because the anisotropy degree decreases, therefore can be prepared into thicklyer relatively, record through test, the thicklyest approximately can reach 1 centimetre.With respect to embodiment two, applicable to the thicker use occasion of some thickness requirement.
Following is object lesson: get natural flake graphite powder (anisotropy graphite) 40%; 20% mixing obtains mixture (above-mentioned each percentage ratio is massfraction) with refinery coke for graphous graphite powder or microlite ink powder (isotropic graphite) 30%, as the component of the first layer graphite linings structure A; Place graphite block (the second graphite linings structure B) to be the mould at the end, slowly be warmed up to 500 ℃, pressurization charing 3h promptly obtains two-layer graphite linings structure burning and is the graphite block material of one.After in mould, taking out, 2400 ℃ of thermal treatments.
Embodiment four
This embodiment is with the difference of embodiment one: in this embodiment, control the first layer graphite linings structure A is made up of the different graphite linings of multi-layered anisotropic degree.Particularly, the height order according to the anisotropy degree is superimposed the multilayer graphite linings after make the first layer graphite linings structure A after charing and the greying successively.When being provided with, the graphite linings that the anisotropy degree is lower among the said the first layer graphite linings structure A is contacted with said second layer graphite linings structure B.
In this embodiment; Process in the graphite block material, its section decomposing schematic representation is as shown in Figure 4, and four layers of different graphite linings A1, A2, A3 and A4 of anisotropy degree form the first layer graphite linings structure A jointly; Be the highest graphite linings A1 of anisotropy degree topmost; Its performance soaking effect of heat insulation is best relatively, next is which floor relatively low graphite linings of anisotropy degree, A2, A3 and A4; It is as transition layer, the top one deck graphite linings A1 and below second layer graphite linings structure B between transmit heat.Like this, the preparation multilayer, wherein the anisotropy degree of adjacent layers differs less, through reducing the amplitude that anisotropy between each layer changes as far as possible, thereby improves the globality of the first layer graphite linings structure A, prevents cracking.Simultaneously,, make that the thickness of the first layer graphite linings structure A is thicker,, require the thicker use occasion of heat dissipating layer thickness applicable to some with respect to embodiment two because of the existence of which floor transition layer of intermediary.And with respect to embodiment three, embodiment three is in the first layer graphite linings structure A, to add the isotropy powder to reduce the anisotropy degree, is the improvement that the anisotropic properties of having sacrificed the first layer graphite linings structure A exchanges the thickness aspect for.And in this embodiment, do not sacrifice the anisotropy degree of the first layer graphite linings structure A, as not wanting to reduce anisotropic properties, thickness is done thicklyer again simultaneously, then can use the improvement project in this embodiment.
Following is object lesson: get natural flake graphite, micro crystal graphite, refinery coke, pitch according to different mixed; Stirring is kneaded into pasty state under 200 ℃, extrudes to be tabular, 5 millimeters of thicknesss of slab.Natural flake graphite content is different, and then the anisotropy degree of each carbon slab is promptly different.Carbon slab is piled up by anisotropy degree order from low to high successively, be unified in 500 ℃ of following hot pressing charings, unified greying promptly makes the first layer graphite linings structure A.Then the first layer graphite linings structure A is arranged on the common graphite linings (second layer graphite linings structure B); The minimum graphite linings of anisotropy degree is in the bottom; B contacts with second layer graphite linings structure, at last the graphite block material that one obtains monoblock is burnt till in the charing of twenty percent graphite linings structure.Because the anisotropy degree of different layers and thermal conductivity are relatively slowly to change, the thermal stress distribution scope that temperature variation causes is wide, can not cause the cracking of self, can use in the violent occasion of temperature variation.
Embodiment five
This embodiment is with the difference of embodiment four: in this embodiment, also comprise filamentary material in the one deck at least in the multilayer graphite linings of composition the first layer graphite linings structure A.
In this embodiment, improvement project is based on the scheme in the embodiment four, promptly is also to comprise filamentary material in the one deck at least in the multilayer graphite linings.Filamentary material can be the charcoal fiber, also can be organic fibre.Preferably, filamentary material is short carbon fiber, thomel or macromolecular fibre.Filamentary material becomes charcoal fiber or graphite fibre in whole carbonization process, can improve the intensity of the first layer graphite linings structure A of formation, further prevents its cracking.
Following is object lesson: get natural flake graphite, micro crystal graphite, refinery coke, short carbon fiber, pitch according to different mixed; Stirring is kneaded into pasty state under 200 ℃, extrudes to be tabular, 5 millimeters of thicknesss of slab.Natural flake graphite content is different, and then the anisotropy degree of each carbon slab is promptly different.Carbon slab is piled up by anisotropy degree order from low to high successively, be unified in 500 ℃ of following hot pressing charings, unified greying promptly makes the first layer graphite linings structure A.Then the first layer graphite linings structure A is arranged on the common graphite linings (second layer graphite linings structure B); The minimum graphite linings of anisotropy degree is in the bottom; B contacts with second layer graphite linings structure, at last the graphite block material that one obtains monoblock is burnt till in the charing of twenty percent graphite linings structure.Owing to increase in the raw material of preparation graphite linings this filamentary material of short carbon fiber is arranged, the first layer graphite linings structure A intensity of therefore processing increases, and can further prevent cracking.
Embodiment six
This embodiment is with the difference of embodiment one: in this embodiment, second layer graphite linings structure is improved, formed second layer graphite linings structure B through long graphite linings and short graphite linings.
As shown in Figure 5; Structural representation for graphite block material in this embodiment; Graphite block material 100 comprises two-layer graphite linings structure, the first layer graphite linings structure A anisotropy, and the first layer graphite linings structure A is arranged on the said second layer graphite linings structure B; And the high relatively heat conduction direction of the first layer graphite linings structure A is and the parallel direction in said second layer graphite linings structure B surface that two-layer graphite linings structure forms an integral body after one is burnt till in charing.Wherein, second layer graphite linings structure B comprises a plurality of long graphite linings B1 and a plurality of short graphite linings B2, and long graphite linings B1 and short graphite linings B2 are provided with at interval, and the formation second layer graphite linings structure B that is bonded to one after the end face side-by-side alignment.The first layer graphite linings structure A is arranged on the end face that is formed by long graphite linings B1 and short graphite linings B2 side-by-side alignment of second layer graphite linings structure B.During preparation second layer graphite linings structure B; Promptly at first prepare long graphite linings B1 of multilayer and the short graphite linings B2 of multilayer; To grow graphite linings B1 and be provided with at interval with short graphite linings B2, and after the end face side-by-side alignment, each graphite linings is bonded to one forms said second layer graphite linings structure B.
Following is specific examples: natural flake graphite with 95% and the heating of 5% mesophase pitch mix pinches (each percentage ratio is massfraction), is hot pressed into the thin slice of thickness 5mm; Strike out rectangular parallelepiped different in size, promptly obtain long graphite linings of multilayer and the short graphite linings of multilayer.With one side of weak point graphite linings it is pasted into piece in long graphite linings with glue then, long graphite linings and short graphite layers are at a distance from setting, and the end face side-by-side alignment.On the end face that alignment forms, paste anisotropic graphite flake again as the first layer graphite linings structure, wait the static pressure charing, obtain burning till the graphite block material of an integral body by two-layer graphite linings structure.Normal pressure was heated to 3000 ℃ of greyings 2 hours again.
Graphite block material in this embodiment; Be used to dispel the heat working process with adstante febre with embodiment one, in this not repeat specification, so the graphite block material of this embodiment; Double-layer structure is provided with; Can bring into play soaking and add heat radiation, the perhaps heat insulation effect that adds heating, the performance that promotes the heat radiation of graphite block material or generate heat.Simultaneously, the interface seamless link, thermal resistance is very little between the double-layer structure interface, heat-transfer effect is good at the interface, be used to dispel the heat or the improved performance of adstante febre more remarkable.The graphite block material is with respect to the graphite block material in the embodiment one in this embodiment; The graphite linings structure second time in this embodiment is made up of the length graphite linings; Feldspar China ink layer segment forms long fin; Short graphite linings partly forms short fin, and when then being used to dispel the heat, being provided with of long fin and short fin is beneficial to further lifting radiating effect.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, make some substituting or obvious modification under the prerequisite of the present invention design not breaking away from, and performance or purposes are identical, all should be regarded as belonging to protection scope of the present invention.
Claims (16)
1. graphite block material; It is characterized in that: comprise two-layer graphite linings structure; Said the first layer graphite linings structure (A) anisotropy; Said the first layer graphite linings structure (A) is arranged on the said second layer graphite linings structure (B), and the high relatively heat conduction direction of said the first layer graphite linings structure (A) is and the parallel direction in said second layer graphite linings structure (B) surface that two-layer graphite linings structure forms an integral body after one is burnt till in charing.
2. graphite block material according to claim 1 is characterized in that: through sticker bonding, form an integral body after burning till one through charing after the bonding between the said two-layer graphite linings structure.
3. graphite block material according to claim 2 is characterized in that: said sticker is pitch, mesophase pitch or resol.
4. graphite block material according to claim 1 is characterized in that: the thickness of said the first layer graphite linings structure (A) is 0.01～1 millimeter.
5. graphite block material according to claim 1; It is characterized in that: comprise anisotropic graphite material and isotropic graphite material in the said the first layer graphite linings structure (A), the thickness of said the first layer graphite linings structure (A) is 0.01～10 millimeter.
6. graphite block material according to claim 1; It is characterized in that: said the first layer graphite linings structure (A) is superimposed according to the height order of anisotropy degree by the different graphite linings of multi-layered anisotropic degree after form after charing and the greying successively, and the middle lower graphite linings of anisotropy degree of said the first layer graphite linings structure (A) contacts with said second layer graphite linings structure (B).
7. graphite block material according to claim 5 is characterized in that: also comprise filamentary material in the one deck at least in the said multilayer graphite linings.
8. graphite block material according to claim 6 is characterized in that: said filamentary material is short carbon fiber, thomel or macromolecular fibre.
9. graphite block material according to claim 1; It is characterized in that: said second layer graphite linings structure (B) comprises a plurality of long graphite linings and a plurality of short graphite linings; Said long graphite linings is provided with short graphite layers is separated, and the formation said second layer graphite linings structure (B) that is bonded to one after the end face side-by-side alignment; Said the first layer graphite linings structure (A) is arranged on the said long graphite linings of said second layer graphite linings structure (B) and the end face that said short graphite linings side-by-side alignment forms.
10. graphite block preparation methods; It is characterized in that: may further comprise the steps: anisotropic the first layer graphite linings structure (A) is arranged on the said second layer graphite linings structure (B), when being provided with the high relatively heat conduction direction of said the first layer graphite linings structure (A) is parallel to the surface of said second layer graphite linings structure (B); Form an integral body after again one being burnt till in the charing of two-layer graphite linings structure, obtain said graphite block material.
11. graphite block preparation methods according to claim 10 is characterized in that: two-layer graphite linings structure through the sticker bonding, is burnt till one with the charing of two-layer graphite linings structure after the bonding again.
12. graphite block preparation methods according to claim 10 is characterized in that: the thickness that also comprises the said the first layer graphite linings structure of control (A) is 0.01～1 millimeter step.
13. graphite block preparation methods according to claim 10; It is characterized in that: said the first layer graphite linings structure (A) makes after being mixed by anisotropic Graphite Powder 99 and isotropic Graphite Powder 99, comprises that also the thickness of the said the first layer graphite linings structure of control (A) is 0.01～10 millimeter.
14. graphite block preparation methods according to claim 10; It is characterized in that: said the first layer graphite linings structure (A) prepares through following method: prepare the different graphite linings of multi-layered anisotropic degree earlier; Then the height order of each layer graphite linings according to the anisotropy degree is superimposed successively; With the graphite linings charing and the greying that are superimposed, process said the first layer graphite linings structure (A) at last; Said the first layer graphite linings structure (A) is arranged on said second layer graphite linings structure (B) last time, the lower graphite linings of anisotropy degree in the said the first layer graphite linings structure (A) is arranged on the said second layer graphite linings structure (B).
15. graphite block preparation methods according to claim 10; It is characterized in that: specifically may further comprise the steps: natural flake graphite or the expanded graphite that 1) will be added with sticker are dispersed in and form slurry in the solvent, as the component of the first layer graphite linings structure (A); 2) slurry that said step 1) is made is molded directly within on one deck graphite block or the graphite precursor with the method for curtain coating or coating; 3) under being lower than the temperature of said solvent boiling point with said step 2) in be covered with graphite block or the graphite precursor oven dry of slurry, after after the charing two-layer graphite linings structure being burnt till one, form an integral body, obtain said graphite block material and make the graphite block material.
16. graphite block preparation methods according to claim 10; It is characterized in that: said second layer graphite linings structure (B) prepares through following method: long graphite linings of preparation multilayer and the short graphite linings of multilayer; Said long graphite linings is provided with short graphite layers is separated; And after the end face side-by-side alignment, each graphite linings is bonded to one forms said second layer graphite linings structure (B); Said the first layer graphite linings structure (A) is arranged on said second layer graphite linings structure (B) last time, said the first layer graphite linings structure (A) is arranged on the end face that said long graphite linings and said short graphite linings side-by-side alignment form.
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| CN109177368A (en) * | 2018-09-06 | 2019-01-11 | 三峡大学 | A kind of graphite film lamination composite board and preparation method thereof |
| US20210086474A1 (en) * | 2018-05-03 | 2021-03-25 | Skc Co., Ltd. | Multilayer graphite sheet with excellent electromagnetic shielding capability and thermal conductivity and manufacturing method therefor |
| CN114702316A (en) * | 2022-03-23 | 2022-07-05 | 湖南大学 | Preparation method and application of low-cost high-purity graphite material |
| US20220379583A1 (en) * | 2021-05-26 | 2022-12-01 | Wah Hong Industrial Corp. | Composite heat dissipation material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101449374A (en) * | 2006-06-08 | 2009-06-03 | 国际商业机器公司 | Highly heat conductive, flexible sheet |
| JP2009190962A (en) * | 2008-01-18 | 2009-08-27 | Kaneka Corp | Multilayer graphite film, method of forming the same, electronic device, display and backlight |
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2012
- 2012-07-24 CN CN201210257376.1A patent/CN102795617B/en active Active
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2013
- 2013-02-28 HK HK13102576.3A patent/HK1175159A1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101449374A (en) * | 2006-06-08 | 2009-06-03 | 国际商业机器公司 | Highly heat conductive, flexible sheet |
| JP2009190962A (en) * | 2008-01-18 | 2009-08-27 | Kaneka Corp | Multilayer graphite film, method of forming the same, electronic device, display and backlight |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105120634A (en) * | 2015-09-06 | 2015-12-02 | 张永锋 | High-conductivity radiator |
| CN105120634B (en) * | 2015-09-06 | 2017-11-14 | 张永锋 | A kind of high conduction heat radiator |
| US20210086474A1 (en) * | 2018-05-03 | 2021-03-25 | Skc Co., Ltd. | Multilayer graphite sheet with excellent electromagnetic shielding capability and thermal conductivity and manufacturing method therefor |
| US11745463B2 (en) * | 2018-05-03 | 2023-09-05 | Skc Co., Ltd. | Multilayer graphite sheet with excellent electromagnetic shielding capability and thermal conductivity and manufacturing method therefor |
| CN109177368A (en) * | 2018-09-06 | 2019-01-11 | 三峡大学 | A kind of graphite film lamination composite board and preparation method thereof |
| US20220379583A1 (en) * | 2021-05-26 | 2022-12-01 | Wah Hong Industrial Corp. | Composite heat dissipation material |
| CN114702316A (en) * | 2022-03-23 | 2022-07-05 | 湖南大学 | Preparation method and application of low-cost high-purity graphite material |
| CN114702316B (en) * | 2022-03-23 | 2023-05-30 | 湖南大学 | Preparation method and application of low-cost high-purity graphite material |
Also Published As
| Publication number | Publication date |
|---|---|
| HK1175159A1 (en) | 2013-06-28 |
| CN102795617B (en) | 2014-10-29 |
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