CN102700230A - Preparation method of heat-conducting fiber reinforced high-heat-conducting graphite heat radiating fin - Google Patents
Preparation method of heat-conducting fiber reinforced high-heat-conducting graphite heat radiating fin Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
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- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
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- H01L23/373—Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
- H01L23/3733—Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon having a heterogeneous or anisotropic structure, e.g. powder or fibres in a matrix, wire mesh, porous structures
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Abstract
The invention provides a preparation method of a heat-conducting fiber reinforced high-heat-conducting graphite heat radiating fin, comprising the following steps of: pretreating graphite powder; processing the pretreated graphite powder by using graphite foil production equipment to prepare a graphite heat conducting and radiating plate; and spraying and sticking the graphite heat conducting and radiating plate and chopped graphite fiber, carbon fiber cloth or carbon fiber as a reinforcing agent by using a binder to prepare the heat-conducting fiber reinforced high-heat-conducting graphite heat radiating fin. The preparation method of the heat-conducting fiber reinforced high-heat-conducting graphite heat radiating fin is used for overcoming the defects such as low mechanical property, short service life, easiness for fall off and the like existing in the traditional preparation process; the mechanical strength and the purity of the heat-conducting fiber reinforced high-heat-conducting graphite heat radiating fin are greatly improved and the convenience is provided for the following machining; the heat-conducting fiber reinforced high-heat-conducting graphite heat radiating fin has the advantages of small weight, high intensity, high heat conducting property and the like; and the application range of a graphite sheet is expanded.
Description
Technical field
The present invention relates to the preparation method of graphite radiating sheet, particularly relate to a kind of preparation method of high conductive graphite fin of heat conducting fiber enhancing.
Background technology
Along with developing rapidly of microelectronics integrated technology and high density printed board package technique, packing density improves rapidly, and electronic component, thousands of times of ground of logic circuit volume dwindle, and electronic instrument and equipment develop towards light, thin, short, little direction day by day.Under the high-frequency work frequency; Semiconductor working heat environment moves rapidly to the high temperature direction; At this moment, heat run-up, increase that electronic devices and components produce are under the environment for use temperature; Make electronic devices and components still can high reliability the ground operate as normal, in time heat-sinking capability becomes the critical limitation in its service life factor that influences.Be to ensure the components and parts operational reliabilitys, need to use the material of excellent combination properties such as high reliability, high thermal conductivity, rapidly, the heat transferred heat dissipation equipment that in time heater element gathered, ensure that electronic equipment normally moves.
Used heat sink material basically all is an aluminium alloy at present, but the thermal conductivity factor of aluminium is not very high (237W/mK), and the heat conductivility of Jin Heyin is better, but price is too high, and the thermal conductivity factor of copper takes second place (398W/mK), but weight of copper is big, is prone to oxidation.And graphite material has high temperature resistant, in light weight (being merely the 1/2-1/5 of traditional metal Heat Conduction Material), thermal conductivity high, chemical stability is strong, thermal coefficient of expansion is little; Replace traditional metal heat-conducting material; Microminiaturized and the high powerization of miniaturization that not only helps electronic device; And can effectively alleviate the weight of device, increase payload.Conventional graphite fin processing method only adopts single graphite powder; Perhaps adopt carbon black, boron nitride, copper powder etc. and the composite filling of graphite particle; The graphite radiating sheet of producing like this under the work graphite dust is come off for a long time, and intensity is little owing to be directly exposed in the electrical equipment original paper environment; Mechanical property is relatively poor, is difficult to satisfy instructions for use.The intensity and the mechanical performance of pure conductive graphite sheet can not show a candle to metal, and this has brought difficulty to following process.Simultaneously, because the frangible shortcoming of graphite can in use be brought problems such as complicated operation, easy damage.The invention provides the preparation method of the high conductive graphite fin that a kind of new heat conducting fiber strengthens for this reason, solved above technical problem.
Summary of the invention
One of the object of the invention provides the high conductive graphite fin that a kind of in light weight, intensity and the high heat conducting fiber of heat conductivility strengthen; Two of purpose provides the preparation method of the high conductive graphite fin that this heat conducting fiber strengthens, and has the high conductive graphite fin of excellent mechanical performances with preparation, satisfies the needs of graphite radiating sheet following process.
One of the object of the invention can be realized through following technical measures:
This preparation method carries out as follows:
Step 1; Elder generation handles the mixed liquor that graphite powder is put into sulfuric acid solution and hydrogen peroxide solution, wherein sulfuric acid solution: hydrogen peroxide solution=1:3-1:20 weight portion, and the processing time is 20min-2h; Treatment temperature is 20-100 ℃; Again graphite powder is heated to 2800-3200 ℃ and carries out high temperature purification, in 10-30 ℃ water, wash after the high temperature purification to the water lotion pH value be 5-6.5, the graphite powder after will washing is then put into the graphite expansion stove and under 800-1000 ℃, is carried out high temperature and expand; The high temperature expansion time is 3-20s, naturally cools to normal temperature then;
Step 2 is processed the graphite heat conducting heat sink with graphite powder after treatment through graphite coiled material production equipment;
Step 3 adopts graphite short fiber, carbon fiber cloth or carbon fiber as reinforcing agent, with binding agent this graphite heat conducting heat sink and this reinforcing agent is sprayed applying, processes the high conductive graphite fin that heat conducting fiber strengthens.
One of the object of the invention also can be realized through following technical measures:
It is that spraying described in the step 3 is fitted for 1 time or repeatedly, described repeatedly is 3 times; Described binding agent is a water-borne pressure sensitive adhesive.
Two of the object of the invention can be realized through following technical measures:
This preparation method carries out as follows:
Step 1, elder generation handles the mixed liquor that graphite powder is put into sulfuric acid solution and hydrogen peroxide solution, wherein sulfuric acid solution: hydrogen peroxide solution=1:3-1:20 weight portion; Processing time is 20min-2h; Treatment temperature is 20-100 ℃, in 10-30 ℃ water, wash then to the water lotion pH value be 5-6.5, the graphite powder after will washing is again put into the graphite expansion stove and under 800-1000 ℃, is carried out high temperature and expand; The high temperature expansion time is 3-20s, naturally cools to normal temperature then;
Step 2, graphite powder is after treatment pressed graphite powder: graphite fibre=3:1-10:1 proportion by weight mixing, process the high conductive graphite fin that heat conducting fiber strengthens through graphite coiled material production equipment again.
Two of the object of the invention also can be realized through following technical measures:
Mixing described in the step 2 is that after treatment graphite powder and graphite fibre mechanical mixture in high mixer is even.Graphite powder after the mechanical mixture and graphite fibre are processed through graphite coiled material production equipment, processed the high conductive graphite fin that heat conducting fiber strengthens.
The preparation method of the high conductive graphite fin that the heat conducting fiber among the present invention strengthens adopts graphite flake and graphite short fiber, carbon fiber cloth, carbon fiber etc. not only to help forming effective heat conduction network chain, but also can improve the mechanical performance of graphite radiating sheet.Adopt graphite short fiber or carbon fiber cloth, carbon fiber etc. as reinforcing agent since graphite fibre not only intensity is high, and good heat conductivity, fine corrosion resistance has strengthened the intensity of flexible graphite platelet, prevents the change of graphite flake generation presentation quality.Adopt such scheme to prepare the graphite radiating sheet, overcome that the mechanical property that exists in the traditional preparation process technology is low, service life short, defective such as be prone to come off.Through the graphite radiating sheet that above-mentioned processing obtains, its mechanical strength and purity improve greatly, are convenient to following process and use, and the graphite heat conducting and heat radiating fin of a kind of in light weight, high strength, high thermal conductivity is provided, and have enlarged the scope of application of graphite flake.
Description of drawings:
Fig. 1 is the preparation method's of the high conductive graphite fin that strengthens of a heat conducting fiber of the present invention specific embodiment structure chart;
Fig. 2 is the preparation method's of the high conductive graphite fin that strengthens of the heat conducting fiber of the present invention principle flow chart of a specific embodiment.
Fig. 3 is the structural representation of the high heat conducting and heat radiating fin that heat conducting fiber strengthens in the embodiments of the invention 1;
Fig. 4 is the structural representation of the high heat conducting and heat radiating fin that heat conducting fiber strengthens in the embodiments of the invention 2;
Fig. 5 is the structural representation of the high heat conducting and heat radiating fin that heat conducting fiber strengthens in the embodiments of the invention 3;
Fig. 6 is the structural representation of the high heat conducting and heat radiating fin that heat conducting fiber strengthens in the embodiments of the invention 4;
Fig. 7 is the structural representation of the high heat conducting and heat radiating fin that heat conducting fiber strengthens in the embodiments of the invention 5.
The specific embodiment
For make above-mentioned and other purposes of the present invention, feature and advantage can be more obviously understandable, the hereinafter spy enumerates preferred embodiment, and cooperates appended graphicly, elaborates as follows.
As shown in Figure 1, Fig. 1 is the preparation method's of the high conductive graphite fin that strengthens of the heat conducting fiber of the present invention flow chart of a specific embodiment.In step 101, natural graphite powder is put into pickling agent carry out chemical treatment, impurity processing.Flow process enters into step 102.
In step 102, natural graphite powder is after treatment washed.Flow process enters into step 103.
In step 103, the natural graphite powder after the washing is put into the graphite expansion stove carry out the high temperature expansion, slowly cooling after high temperature expands., accomplished natural graphite powder and carried out the preceding preliminary treatment of moulding to step 103 through step 101.Flow process enters into step 104.
In step 104, will pass through the hot graphite powder in sky after the washing through the processing of a graphite coiled material production equipment, process the graphite heat conducting heat sink.Flow process enters into step 105.
In step 105, adopt graphite short fiber, carbon fiber cloth or carbon fiber as reinforcing agent, with binding agent graphite heat conducting heat sink and graphite short fiber, carbon fiber cloth or carbon fiber are sprayed applying.Continuous graphite fiber, carbon fiber cloth, carbon fiber are to carry main body; Play the main effect of bear external force; Therefore adopt continuous graphite fiber, carbon fiber cloth, the carbon fiber of lower content to strengthen the graphite heat conducting material, can obtain high strength, high conductive graphite fin.
In one embodiment, also can increase the consumption of graphite short fiber, carbon fiber cloth or these reinforcing agents of carbon fiber, can repeatedly graphite cake and graphite short fiber, carbon fiber cloth or carbon fiber be fitted, increase the thickness of reinforcing agent with binding agent.Therefore also very significantly strengthen the intensity of flexible graphite platelet, can be applied in the purposes of high strength operation, and can not reduce its heat conduction and heat radiation rate, enlarged the heat radiation scope of application of graphite flake.
As shown in Figure 2, Fig. 2 is the preparation method's of the high conductive graphite fin that strengthens of the heat conducting fiber of the present invention flow chart of another specific embodiment.In step 201, natural graphite powder is put into pickling agent carry out chemical treatment, impurity processing.Flow process enters into step 202.
In step 202, natural graphite powder is after treatment washed.Flow process enters into step 203.
In step 203, the natural graphite powder after the washing is put into the graphite expansion stove carry out the high temperature expansion, slowly cooling after high temperature expands., accomplished natural graphite powder and carried out the preceding preliminary treatment of moulding to step 203 through step 201.Flow process enters into step 204.
In step 204, the hot graphite powder in sky that will pass through after the washing carries out mechanical mixture with graphite fibre in high mixer, evenly align after the mixing.Flow process enters into step 205.
In step 205, hot graphite powder in sky after the mechanical mixture and graphite fibre are processed through graphite coiled material production equipment, process the high conductive graphite fin of high strength.Graphite fibre is scattered in the graphite matrix with the form of isolated island, and the overlap joint of graphite fibre and natural graphite powder increases, and heat transfer area increases; Effective heat conduction chain or thermal conductive network have been formed; Thereby the thermal conductivity of composite is obviously improved, and this method can not only obtain the conductive graphite fin of superperformance, and it is simple also to have behaviour's technology; With short production cycle, advantages such as instant effect.
Below for adopting five specific embodiments of above-mentioned two kinds of technical schemes, so that the preparation method of the high conductive graphite fin that the heat conducting fiber among the present invention is strengthened further explains.
Embodiment 1:
Selecting carbon element content is 98%, and particle diameter is natural graphite powder and the graphite short fiber of 100 μ m, and the mass ratio of graphite powder and graphite short fiber is 8:1.Natural graphite powder is put into pickling agent carry out chemical treatment, impurity processing, graphite powder is after treatment washed, put into the graphite expansion stove then and carry out the high temperature expansion, high temperature expands, and the back is slow cools off.Graphite powder is after treatment pressed graphite powder: graphite fibre=3:1 proportion by weight mixing, processing density through graphite coiled material production equipment again is 1.2g/cm3, thickness is the graphite heat conducting heat sink of 0.5mm.Then the graphite short fiber is blended in the water-borne pressure sensitive adhesive; With high strength dispersion machine dispersed with stirring evenly after; Uniformly spray on this graphite radiating plate, behind the bone dry, fast and this graphite heat conducting heat sink bonding plane of another sheet bonding each other; And apply certain pressure, finally obtain the graphite radiating sheet of high strength high thermal conductivity.As shown in Figure 3, Fig. 3 is the structural representation of the high heat conducting and heat radiating fin that heat conducting fiber strengthens in the embodiments of the invention 1.Wherein, 11 is the graphite radiating plate, and 12 is water-borne pressure sensitive adhesive, and 13 is the graphite short fiber.
Embodiment 2:
Selecting carbon element content is 96%, and particle diameter is natural graphite powder and the carbon fiber of 200 μ m, and the mass ratio of graphite powder and carbon fiber is 8:1.Natural graphite powder is put into pickling agent carry out chemical treatment, impurity processing, graphite powder is after treatment washed, put into the graphite expansion stove then and carry out the high temperature expansion, high temperature expands, and the back is slow cools off.Graphite powder is after treatment pressed graphite powder: graphite fibre=10:1 proportion by weight mixing is 1.2g/cm3 through graphite coiled material production equipment degree of processing again, and thickness is the graphite heat conducting heat sink of 1.0mm.Be combined in the water-borne pressure sensitive adhesive carbon fiber mixed then; With high strength dispersion machine dispersed with stirring evenly after; Uniformly spray on this graphite radiating plate, behind the bone dry, fast and this graphite heat conducting heat sink bonding plane of another sheet bonding each other; And apply certain pressure, finally obtain the graphite radiating sheet of high strength high thermal conductivity.As shown in Figure 4, Fig. 4 is the structural representation of the high heat conducting and heat radiating fin that heat conducting fiber strengthens in the embodiments of the invention 2.Wherein, 21 is the graphite radiating plate, and 22 is water-borne pressure sensitive adhesive, and 24 is carbon fiber.
Embodiment 3:
Selecting carbon element content is 98%, and particle diameter is natural graphite powder and the carbon fiber cloth of 500 μ m, and the mass ratio of graphite powder and carbon fiber cloth is 7:1.Natural graphite powder is put into pickling agent carry out chemical treatment, impurity processing, graphite powder is after treatment washed, put into the graphite expansion stove then and carry out the high temperature expansion, high temperature expands, and the back is slow cools off.Graphite powder is after treatment pressed graphite powder: graphite fibre=6:1 proportion by weight mixing is 0.8g/cm3 through graphite coiled material production equipment density again, and thickness is the graphite heat conducting heat sink of 0.5mm.Then the graphite radiating sheet one side that makes is coated water-borne pressure sensitive adhesive uniformly; After treating its bone dry; Be coated in carbon fiber cloth on the water-borne pressure sensitive adhesive fast; Above the graphite radiating plate that then another sheet is scribbled water-borne pressure sensitive adhesive is fitted in, and apply the graphite radiating sheet that certain pressure finally obtains the high strength high thermal conductivity.As shown in Figure 5, Fig. 5 is the structural representation of the high heat conducting and heat radiating fin that heat conducting fiber strengthens in the embodiments of the invention 3.Wherein, 31 is the graphite radiating plate, and 32 is water-borne pressure sensitive adhesive, and 35 is carbon fiber cloth.
Embodiment 4:
Selecting carbon element content is 98%, and particle diameter is natural graphite powder and the carbon fiber cloth of 500 μ m, and the mass ratio of graphite powder and carbon fiber cloth is 3:1.Natural graphite powder is put into pickling agent carry out chemical treatment, impurity processing, graphite powder is after treatment washed, put into the graphite expansion stove then and carry out the high temperature expansion, high temperature expands, and the back is slow cools off.Graphite powder is after treatment pressed graphite powder: graphite fibre=5:1 proportion by weight mixing, processing density through graphite coiled material production equipment again is 0.8g/cm3, thickness is the graphite heat conducting heat sink of 0.3mm.Then the graphite radiating sheet one side that makes is coated water-borne pressure sensitive adhesive uniformly; After treating its bone dry, be coated in carbon fiber cloth on the water-borne pressure sensitive adhesive fast, above the graphite radiating plate that then another sheet is scribbled water-borne pressure sensitive adhesive is fitted in; And apply certain pressure, it is bondd.Coat water-borne pressure sensitive adhesive at this above the graphite radiating plate; After treating its bone dry; Be coated in second layer carbon fiber cloth on the water-borne pressure sensitive adhesive fast; Above the graphite radiating plate that another sheet is scribbled water-borne pressure sensitive adhesive is fitted in, apply certain pressure, finally obtain the graphite radiating sheet of high strength high thermal conductivity.As shown in Figure 6, Fig. 6 is the structural representation of the high heat conducting and heat radiating fin that heat conducting fiber strengthens in the embodiments of the invention 4.Wherein, 41 is the graphite radiating plate, and 42 is water-borne pressure sensitive adhesive, and 45 is carbon fiber cloth.
Embodiment 5:
Selecting carbon element content is 98%, and particle diameter is natural graphite powder and the graphite fibre of 200 μ m, and the mass ratio of graphite powder and graphite fibre is 4:1.Natural graphite powder is put into pickling agent carry out chemical treatment, impurity processing, graphite powder is after treatment washed, put into the graphite expansion stove then and carry out the high temperature expansion, high temperature expands, and the back is slow cools off.Graphite powder is after treatment pressed graphite powder: graphite fibre=8:1 proportion by weight mixing, processing density through graphite coiled material production equipment again is 1.4g/cm3, thickness is the graphite radiating sheet of the high strength high thermal conductivity of 2mm.As shown in Figure 7, Fig. 7 is the structural representation of the high heat conducting and heat radiating fin that heat conducting fiber strengthens in the embodiments of the invention 2.Wherein, 53 is graphite fibre, and 56 is graphite powder.
As shown in the table, table 1 is the reinforced effects contrast table that adopts the hot strength of the existing method of pure graphite radiating sheet and the fin that instance 1 mentioned above arrives instance 5 acquisitions.Can know from table 1, compare that instance 1 has obtained tangible enhancing to the hot strength of the fin that instance 5 obtains with existing method.
The reinforced effects contrast table of table 1 hot strength
| Instance | Technology | Hot strength (MPa) |
| Existing method | Pure graphite radiating sheet | 4.0 |
| Instance 1 | The two-layer graphite flake graphite short fiber that evenly bonds | 5.3 |
| Instance 2 | The even bonded carbon fiber of two-layer graphite flake | 5.1 |
| Instance 3 | Two-layer graphite flake one deck carbon fiber cloth that evenly bonds | 3004 |
| Instance 4 | Two-layer graphite flake is two layers of carbon fiber cloth of bonding evenly | 3456 |
| Instance 5 | Doped graphite short fiber in the conductive graphite sheet | 4.8 |
Embodiment 6:
This preparation method carries out as follows:
Step 1, elder generation handles the mixed liquor that graphite powder is put into sulfuric acid solution and hydrogen peroxide solution, wherein sulfuric acid solution: hydrogen peroxide solution=1:3 weight portion; Processing time is 2h, and treatment temperature is 20 ℃, graphite powder is heated to 3200 ℃ carry out high temperature purification again; In 10 ℃ water, wash after the high temperature purification to the water lotion pH value be 6.5; Graphite powder after will washing is then put into the graphite expansion stove and under 800 ℃, is carried out the high temperature expansion, and the high temperature expansion time is 20s, naturally cools to normal temperature then;
Step 2 is processed the graphite heat conducting heat sink with graphite powder after treatment through graphite coiled material production equipment;
Step 3 adopts graphite short fiber, carbon fiber cloth or carbon fiber as reinforcing agent, and the use pressure sensitive adhesive sprays applying 1 time with this graphite heat conducting heat sink and this reinforcing agent, processes the high conductive graphite fin that heat conducting fiber strengthens.
Embodiment 7:
This preparation method carries out as follows:
Step 1, elder generation handles the mixed liquor that graphite powder is put into sulfuric acid solution and hydrogen peroxide solution, wherein sulfuric acid solution: hydrogen peroxide solution=1:20 weight portion; Processing time is 20min, and treatment temperature is 100 ℃, graphite powder is heated to 2800 ℃ carry out high temperature purification again; In 30 ℃ water, wash after the high temperature purification to the water lotion pH value be 5; Graphite powder after will washing is then put into the graphite expansion stove and under 1000 ℃, is carried out the high temperature expansion, and the high temperature expansion time is 3s, naturally cools to normal temperature then;
Step 2 is processed the graphite heat conducting heat sink with graphite powder after treatment through graphite coiled material production equipment;
Step 3 adopts graphite short fiber, carbon fiber cloth or carbon fiber as reinforcing agent, and the use pressure sensitive adhesive sprays applying 3 times with this graphite heat conducting heat sink and this reinforcing agent, processes the high conductive graphite fin that heat conducting fiber strengthens.
Embodiment 8:
This preparation method carries out as follows:
Step 1, elder generation handles the mixed liquor that graphite powder is put into sulfuric acid solution and hydrogen peroxide solution, wherein sulfuric acid solution: hydrogen peroxide solution=1:10 weight portion; Processing time is 1h, and treatment temperature is 60 ℃, graphite powder is heated to 3000 ℃ carry out high temperature purification again; In 20 ℃ water, wash after the high temperature purification to the water lotion pH value be 6.0; Graphite powder after will washing is then put into the graphite expansion stove and under 900 ℃, is carried out the high temperature expansion, and the high temperature expansion time is 10s, naturally cools to normal temperature then;
Step 2 is processed the graphite heat conducting heat sink with graphite powder after treatment through graphite coiled material production equipment;
Step 3 adopts graphite short fiber, carbon fiber cloth or carbon fiber as reinforcing agent, and the use pressure sensitive adhesive sprays applying 2 times with this graphite heat conducting heat sink and this reinforcing agent, processes the high conductive graphite fin that heat conducting fiber strengthens.
Embodiment 9:
This preparation method carries out as follows:
Step 1, elder generation handles the mixed liquor that graphite powder is put into sulfuric acid solution and hydrogen peroxide solution, wherein sulfuric acid solution: hydrogen peroxide solution=1:20 weight portion; Processing time is 20min; Treatment temperature is 100 ℃, in 10 ℃ water, wash then to the water lotion pH value be 6.5, the graphite powder after will washing is again put into the graphite expansion stove and under 800 ℃, is carried out high temperature and expand; The high temperature expansion time is 20s, naturally cools to normal temperature then;
Step 2 with graphite powder and graphite fibre mechanical mixing in high mixer after treatment, is processed the high conductive graphite fin that heat conducting fiber strengthens through graphite coiled material production equipment again.
Embodiment 10:
This preparation method carries out as follows:
Step 1, elder generation handles the mixed liquor that graphite powder is put into sulfuric acid solution and hydrogen peroxide solution, wherein sulfuric acid solution: hydrogen peroxide solution=1:3 weight portion; Processing time is 2h; Treatment temperature is 20 ℃, in 30 ℃ water, wash then to the water lotion pH value be 5, the graphite powder after will washing is again put into the graphite expansion stove and under 1000 ℃, is carried out high temperature and expand; The high temperature expansion time is 3s, naturally cools to normal temperature then;
Step 2 with graphite powder and graphite fibre mechanical mixing in high mixer after treatment, is processed the high conductive graphite fin that heat conducting fiber strengthens through graphite coiled material production equipment again.
Embodiment 11:
This preparation method carries out as follows:
Step 1, elder generation handles the mixed liquor that graphite powder is put into sulfuric acid solution and hydrogen peroxide solution, wherein sulfuric acid solution: hydrogen peroxide solution=1:10 weight portion; Processing time is 1h; Treatment temperature is 60 ℃, in 20 ℃ water, wash then to the water lotion pH value be 5.5, the graphite powder after will washing is again put into the graphite expansion stove and under 900 ℃, is carried out high temperature and expand; The high temperature expansion time is 10s, naturally cools to normal temperature then;
Step 2 with graphite powder and graphite fibre mechanical mixing in high mixer after treatment, is processed the high conductive graphite fin that heat conducting fiber strengthens through graphite coiled material production equipment again.
Claims (5)
1. the preparation method of the high conductive graphite fin that strengthens of a heat conducting fiber is characterized in that this preparation method carries out as follows:
Step 1; Elder generation handles the mixed liquor that graphite powder is put into sulfuric acid solution and hydrogen peroxide solution, wherein sulfuric acid solution: hydrogen peroxide solution=1:3-1:20 weight portion, and the processing time is 20min-2h; Treatment temperature is 20-100 ℃; Again graphite powder is heated to 2800-3200 ℃ and carries out high temperature purification, in 10-30 ℃ water, wash after the high temperature purification to the water lotion pH value be 5-6.5, the graphite powder after will washing is then put into the graphite expansion stove and under 800-1000 ℃, is carried out high temperature and expand; The high temperature expansion time is 3-20s, naturally cools to normal temperature then;
Step 2 is processed the graphite heat conducting heat sink with graphite powder after treatment through graphite coiled material production equipment;
Step 3 adopts graphite short fiber, carbon fiber cloth or carbon fiber as reinforcing agent, with binding agent this graphite heat conducting heat sink and this reinforcing agent is sprayed applying, processes the high conductive graphite fin that heat conducting fiber strengthens.
2. the preparation method of the high conductive graphite fin that a kind of heat conducting fiber according to claim 1 strengthens is characterized in that it is that the spraying described in the step 3 is fitted for 1 time or repeatedly.
3. the preparation method of the high conductive graphite fin that a kind of heat conducting fiber according to claim 1 strengthens is characterized in that described binding agent is a water-borne pressure sensitive adhesive.
4. the preparation method of the high conductive graphite fin that strengthens of a heat conducting fiber is characterized in that this preparation method carries out as follows:
Step 1, elder generation handles the mixed liquor that graphite powder is put into sulfuric acid solution and hydrogen peroxide solution, wherein sulfuric acid solution: hydrogen peroxide solution=1:3-1:20 weight portion; Processing time is 20min-2h; Treatment temperature is 20-100 ℃, in 10-30 ℃ water, wash then to the water lotion pH value be 5-6.5, the graphite powder after will washing is again put into the graphite expansion stove and under 800-1000 ℃, is carried out high temperature and expand; The high temperature expansion time is 3-20s, naturally cools to normal temperature then;
Step 2, graphite powder is after treatment pressed graphite powder: graphite fibre=3:1-10:1 proportion by weight mixing, process the high conductive graphite fin that heat conducting fiber strengthens through graphite coiled material production equipment again.
5. the preparation method of the high conductive graphite fin that a kind of heat conducting fiber according to claim 4 strengthens is characterized in that the mixing described in the step 2 is that after treatment graphite powder and graphite fibre mechanical mixture in high mixer is even.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210194049 CN102700230A (en) | 2012-06-13 | 2012-06-13 | Preparation method of heat-conducting fiber reinforced high-heat-conducting graphite heat radiating fin |
| PCT/CN2012/001606 WO2013185269A1 (en) | 2012-06-13 | 2012-11-30 | High thermal conductivity graphite heat sink enhanced with thermally conductive fiber and method for preparing same |
| CN201210530885.7A CN102975417B (en) | 2012-06-13 | 2012-12-11 | The high thermal conductivity graphite radiating fins that a kind of heat conducting fiber strengthens and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN103298321A (en) * | 2013-06-24 | 2013-09-11 | 江西量一光电科技有限公司 | Tungsten-copper alloy and graphite composite cooling fin and production method thereof |
| WO2013185269A1 (en) * | 2012-06-13 | 2013-12-19 | 天诺光电材料股份有限公司 | High thermal conductivity graphite heat sink enhanced with thermally conductive fiber and method for preparing same |
| CN103770433A (en) * | 2012-10-18 | 2014-05-07 | 绿晶能源股份有限公司 | Artificial graphite heat radiation substrate and making method thereof |
| CN107324829A (en) * | 2017-07-11 | 2017-11-07 | 广东思泉新材料股份有限公司 | A kind of preparation method of graphite flake |
| CN108218378A (en) * | 2017-12-30 | 2018-06-29 | 常州水精灵环保设备有限公司 | A kind of preparation method of fire-retardant crack resistance type graphite heat radiation fin |
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| JP2000091453A (en) * | 1998-09-10 | 2000-03-31 | Ishino Corporation:Kk | Heat-radiating sheet material, manufacture thereof and radiator using the same |
| US6749010B2 (en) * | 2002-06-28 | 2004-06-15 | Advanced Energy Technology Inc. | Composite heat sink with metal base and graphite fins |
| JP4686274B2 (en) * | 2005-06-30 | 2011-05-25 | ポリマテック株式会社 | Heat dissipation component and manufacturing method thereof |
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| CN101977487A (en) * | 2010-10-09 | 2011-02-16 | 王春 | Large-power electronic product cooling device |
| CN102244153B (en) * | 2011-04-19 | 2013-05-01 | 梁胜光 | Preparation method of graphite heat radiation fin |
| CN202135441U (en) * | 2011-07-22 | 2012-02-01 | 长沙理工大学 | Composite radiating fin |
| CN102700230A (en) * | 2012-06-13 | 2012-10-03 | 天诺光电材料股份有限公司 | Preparation method of heat-conducting fiber reinforced high-heat-conducting graphite heat radiating fin |
-
2012
- 2012-06-13 CN CN 201210194049 patent/CN102700230A/en active Pending
- 2012-11-30 WO PCT/CN2012/001606 patent/WO2013185269A1/en active Application Filing
- 2012-12-11 CN CN201210530885.7A patent/CN102975417B/en active Active
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| WO2013185269A1 (en) * | 2012-06-13 | 2013-12-19 | 天诺光电材料股份有限公司 | High thermal conductivity graphite heat sink enhanced with thermally conductive fiber and method for preparing same |
| CN103770433A (en) * | 2012-10-18 | 2014-05-07 | 绿晶能源股份有限公司 | Artificial graphite heat radiation substrate and making method thereof |
| CN103298321A (en) * | 2013-06-24 | 2013-09-11 | 江西量一光电科技有限公司 | Tungsten-copper alloy and graphite composite cooling fin and production method thereof |
| CN107324829A (en) * | 2017-07-11 | 2017-11-07 | 广东思泉新材料股份有限公司 | A kind of preparation method of graphite flake |
| CN107324829B (en) * | 2017-07-11 | 2019-12-10 | 广东思泉新材料股份有限公司 | Preparation method of graphite flake |
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| CN110793374A (en) * | 2019-10-24 | 2020-02-14 | 天津金力通金属制品有限公司 | High-heat-conductivity radiating fin for radiator and processing method thereof |
| CN113278406A (en) * | 2020-02-19 | 2021-08-20 | 国家能源投资集团有限责任公司 | Heat-conducting film composite material and preparation method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2013185269A1 (en) | 2013-12-19 |
| CN102975417A (en) | 2013-03-20 |
| CN102975417B (en) | 2015-09-23 |
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