CN115488330B - Method for producing copper particles and copper particles - Google Patents
Method for producing copper particles and copper particles Download PDFInfo
- Publication number
- CN115488330B CN115488330B CN202110614981.9A CN202110614981A CN115488330B CN 115488330 B CN115488330 B CN 115488330B CN 202110614981 A CN202110614981 A CN 202110614981A CN 115488330 B CN115488330 B CN 115488330B
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- raw material
- copper powder
- copper
- slurry
- polymer binder
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 51
- 239000010949 copper Substances 0.000 title claims abstract description 51
- 239000002245 particle Substances 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 239000002994 raw material Substances 0.000 claims abstract description 43
- 229920005596 polymer binder Polymers 0.000 claims abstract description 29
- 239000002491 polymer binding agent Substances 0.000 claims abstract description 29
- 239000002002 slurry Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 6
- 238000006722 reduction reaction Methods 0.000 claims abstract description 6
- 239000011230 binding agent Substances 0.000 claims description 9
- 229920002472 Starch Polymers 0.000 claims description 8
- 229920001592 potato starch Polymers 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 229920002261 Corn starch Polymers 0.000 claims description 4
- 240000003183 Manihot esculenta Species 0.000 claims description 4
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 claims description 4
- 239000008120 corn starch Substances 0.000 claims description 4
- 235000019698 starch Nutrition 0.000 claims description 4
- 239000008107 starch Substances 0.000 claims description 4
- 229940100445 wheat starch Drugs 0.000 claims description 4
- 238000004090 dissolution Methods 0.000 claims description 2
- 230000018044 dehydration Effects 0.000 claims 1
- 238000006297 dehydration reaction Methods 0.000 claims 1
- 238000009692 water atomization Methods 0.000 abstract description 5
- 230000017525 heat dissipation Effects 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
- B22F1/142—Thermal or thermo-mechanical treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
- B22F1/145—Chemical treatment, e.g. passivation or decarburisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
- F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- General Engineering & Computer Science (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention discloses a method for manufacturing copper particles and copper particles. The manufacturing method provided by the invention comprises the following steps: mixing the primary copper powder raw material, the polymer binder and water to prepare slurry; heating the slurry to prepare a secondary copper powder raw material; and carrying out reduction reaction on the secondary copper powder raw material to prepare copper particles. Wherein the raw material of the primary copper powder can be copper powder prepared by a water atomization method. The copper particles produced by the invention contain more than three primary copper powders which are connected into a chain shape. The invention has the advantages of simple manufacturing method and easy mass production, and the prepared copper particles have larger surface area, lower apparent density and better capillary force. When the copper particles are used for manufacturing the heat pipe, the heat dissipation efficiency can be improved. In addition, the copper particle component of the invention is simple, and the reliability of the heat pipe is not affected.
Description
Technical Field
The present invention relates to metal particles and a method for producing metal particles, and more particularly, to copper particles and a method for producing copper particles.
Background
The use of heat pipes in the field of heat dissipation has become increasingly popular. The working principle of the heat pipe is that the inner wall surface of the heat pipe is provided with a capillary structure, so that working fluid in the heat pipe can flow rapidly along the capillary structure to transfer heat instantly. The capillary structure of the heat pipe has various forms, wherein the capillary structure of the copper powder sintering type has stronger capillary force, larger heat transmission capacity and better anti-gravity effect, and is most commonly used in high-power servers, high-order notebook computers and some industrial computer fields.
During the manufacture of the heat pipe, copper powder raw material is sintered in the inner wall surface of a pipe body. The copper powder raw material is produced by a water atomization method, an electrolytic method, a agglomeration method, and a ball milling method, among which the water atomization method is most widely used, to produce a copper powder raw material having a low bulk density (APPARENT DENSITY). In order to further reduce the bulk density and increase the porosity, oxygen increasing operation is performed in the water atomization method, thereby generating voids or cracks on the surface of the copper powder raw material. However, the oxidation of the copper powder material produced by the oxygenation operation may affect the performance of the sintered capillary structure and the reliability of the heat pipe produced.
In view of the above, a better improvement scheme is proposed, which is a problem to be solved in the industry.
Disclosure of Invention
The main purpose of the invention is to provide a method for manufacturing copper particles, which is simple and easy for mass production, and the manufactured copper particles have larger surface area and lower apparent density.
In order to achieve the above object, the manufacturing method according to the present invention comprises the following steps:
mixing the primary copper powder raw material, the polymer binder and water to prepare slurry;
Heating the slurry to prepare a secondary copper powder raw material; and
And carrying out reduction reaction on the secondary copper powder raw material to prepare copper particles.
To achieve the above object, the copper particles according to the present invention comprise three or more primary copper powders connected in a chain.
Therefore, the invention has the advantages that the existing copper powder is combined into copper particles in a chain form, and the copper powder has larger surface area, lower apparent density (for example, 1.0g/cm < 3 > -2.5 g/cm < 3 >), and better capillary force. In addition, the copper particle provided by the invention is simple in manufacturing method and easy to produce in mass production, and when the copper particle is used for manufacturing a heat pipe, the heat dissipation efficiency can be improved. In addition, the copper particle component of the invention is simple, and the reliability of the heat pipe is not affected.
In the method for producing copper particles, in the step of mixing the raw material of the primary copper powder, the polymer binder, and water to form a slurry, the polymer binder is added after heating the water, and the raw material of the primary copper powder is added after the polymer binder is dissolved.
Further, in the method for producing copper particles as described above, in the step of "mixing the raw copper powder, the polymer binder, and water to prepare a slurry", the water is heated to 40 to 70 ℃.
Further, in the method for producing copper particles as described above, in the step of "mixing the raw material of the primary copper powder, the polymer binder, and water to prepare a slurry", the polymer binder is heated to 60 to 90 ℃ during the dissolution process, and then the raw material of the primary copper powder is added.
Further, in the method for producing copper particles as described above, in the step of "mixing the raw material of the primary copper powder, the polymer binder, and water to prepare a slurry", the raw material of the primary copper powder, the polymer binder, and water are mixed and then heated to 65 ℃ to 95 ℃ to prepare a slurry.
Further, in the method for producing copper particles as described above, in the step of "heating the slurry to prepare a secondary copper powder raw material", the slurry is first heated to dehydrate.
Further, in the method for producing copper particles as described above, the polymer binder may include corn starch, potato starch, wheat starch, tapioca starch, or a combination thereof.
Further, in the method for producing copper particles as described above, in the step of "heating the slurry to prepare a secondary copper powder raw material", the slurry is heated to 300 ℃ to 600 ℃, whereby the polymer binder is burned off.
Further, in the copper particles as described above, the particle size is 40 to 325 mesh.
Drawings
Fig. 1 is a flow chart of the manufacturing method of the present invention.
Fig. 2 is a photomicrograph of copper particles of the invention.
Detailed Description
The technical means adopted by the invention to achieve the preset aim are further described below by matching with the attached drawings and the preferred embodiments of the invention.
The invention provides a method for manufacturing copper particles and copper particles.
Please refer to fig. 1 first. The manufacturing method sequentially comprises a modulation step, a heating step and a reduction step.
In the preparation step, the primary copper powder raw material, the polymer binder and water are mixed to prepare a slurry. The raw material of the primary copper powder is copper powder prepared by the prior art. In other words, the present invention uses the existing copper powder as the raw material to process again to prepare the particles with lower apparent density and higher porosity. Further, it is preferable to select copper powder produced by the water atomization method as a raw material of the primary copper powder for processing. The polymeric binder may be corn starch, potato starch, wheat starch, tapioca starch, or combinations thereof, for example: the polymer binder may be a combination of corn starch and potato starch, or the polymer binder may be a combination of potato starch, wheat starch, tapioca starch.
In the preparation step, the polymer binder is fully mixed with water, and then the primary copper powder raw material is added to be mixed into slurry. Specifically, water is heated, then a high molecular binder is added until the weight percentage is between 5 and 20 percent, and after the high molecular binder is dissolved, the raw material of the primary copper powder is added until the weight percentage of the raw material of the primary copper powder is between 5 and 50 percent. In the preparation step, the water may be heated to 40 to 70 ℃ and then the polymeric binder may be added. In addition, the polymer binder may be further heated to 60-90 deg.c during the dissolving process, and then the primary copper powder material may be added. Finally, the primary copper powder raw material, the polymer binder and water can be mixed and then heated to 65 ℃ to 95 ℃ so as to ensure that the mixture is uniform and does not delaminate, thus obtaining the slurry. Preferably, the primary copper powder raw material, the polymeric binder, and water are mixed while being heated in a water-proof manner.
In the heating step, the heating may be divided into two stages. The first stage heating may be to dehydrate the slurry and the second stage heating may be to burn off the polymeric binder to form the secondary copper powder raw material. In the first stage of heating, the slurry may be dried in an oven at 60 to 200 ℃. In the second stage heating, the dried and dehydrated slurry can be placed in a roasting furnace for roasting, the temperature of the roasting furnace can be 300-600 ℃, and the roasting time can be two-six hours. Air is introduced during the firing process so that the polymeric binder burns at high temperatures, thereby burning off the polymeric binder. The secondary copper powder raw material is formed after the polymer binder is burnt out.
Since the particle surface of the secondary copper powder raw material may have an oxide layer, a subsequent reduction step may be performed to remove the oxide layer. Specifically, in the reduction step, the secondary copper powder raw material is heated to 300 ℃ to 600 ℃, and mixed gas of hydrogen and nitrogen is introduced until all the oxide layers are reduced, so that the copper particles of the invention are formed.
The iron can be removed and sieved to different grades or particle sizes, and the products are packaged and put in storage after being tested.
Next, please refer to fig. 2, which is a photograph of copper particles taken at a working distance of 16.4 millimeters (mm), an accelerating voltage of 15.0 kv, and a magnification of 100 times. The distance between two adjacent reference points in the lower right corner of fig. 2 is 50 micrometers (μm). The copper particles prepared by the preparation method can be 40-325 meshes in particle size, and each copper particle contains more than three primary copper powders. In other words, the copper particles of the present invention may be comprised of a minimum of three primary copper powders joined together. These primary copper powders may be linked in random chains and may be single straight or dendritic, coral-like branches.
In summary, the present invention combines the existing copper powder in a chain form into copper particles with a larger surface area, lower bulk density (e.g., up to 1.0g/cm 3 to 2.5g/cm 3), and better capillary force. In addition, the copper particle provided by the invention is simple in manufacturing method and easy to produce in mass production, and when the copper particle is used for manufacturing a heat pipe, the heat dissipation efficiency can be improved. In addition, the copper particle component of the invention is simple, and the reliability of the heat pipe is not affected. The present invention is not limited to the preferred embodiments, but is capable of modification and variation in all aspects, including the following description, but not limited to, various modifications and equivalents, which will be apparent to those skilled in the art, without departing from the scope of the present invention.
Claims (8)
1. A method for producing copper particles, comprising the following steps in order:
Mixing a primary copper powder raw material, a high polymer binder and water to prepare slurry, wherein the high polymer binder comprises corn starch, potato starch, wheat starch, tapioca starch or a combination thereof;
Heating the slurry to produce a secondary copper powder raw material, wherein the slurry is heated to 300 ℃ to 600 ℃, thereby burning off the polymeric binder; and
And carrying out reduction reaction on the secondary copper powder raw material to prepare copper particles.
2. The method according to claim 1, wherein in the step of mixing the raw material of the primary copper powder, the polymer binder, and water to form a slurry, the polymer binder is added after heating the water, and the raw material of the primary copper powder is added after the polymer binder is dissolved.
3. The method according to claim 2, wherein in the step of mixing the raw material of the primary copper powder, the polymer binder, and water to form a slurry, the water is heated to 40 ℃ to 70 ℃.
4. The method according to claim 2, wherein the primary copper powder raw material is added after the polymer binder is heated to 60 ℃ to 90 ℃ during the dissolution process in the step of mixing the primary copper powder raw material, the polymer binder, and water to prepare a slurry.
5. The method according to claim 2, wherein in the step of mixing the raw material of the copper powder, the polymer binder, and water to form a slurry, the raw material of the copper powder, the polymer binder, and water are mixed and heated to 65 ℃ to 95 ℃ to form a slurry.
6. The method according to any one of claims 1 to 5, wherein in the step of heating the slurry to prepare a secondary copper powder raw material, the slurry is heated to dehydration.
7. Copper particles obtained by the production method according to any one of claims 1 to 6, characterized in that they comprise three or more primary copper powders, which are linked in a chain.
8. Copper particles according to claim 7, characterized in that the particle size is 40 to 325 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110614981.9A CN115488330B (en) | 2021-06-02 | 2021-06-02 | Method for producing copper particles and copper particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110614981.9A CN115488330B (en) | 2021-06-02 | 2021-06-02 | Method for producing copper particles and copper particles |
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| Publication Number | Publication Date |
|---|---|
| CN115488330A CN115488330A (en) | 2022-12-20 |
| CN115488330B true CN115488330B (en) | 2024-05-10 |
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| CN202110614981.9A Active CN115488330B (en) | 2021-06-02 | 2021-06-02 | Method for producing copper particles and copper particles |
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| CN110079691A (en) * | 2019-06-14 | 2019-08-02 | 安泰天龙钨钼科技有限公司 | A kind of low molybdenum content molybdenum-copper and preparation method thereof |
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| CN111331129A (en) * | 2020-04-26 | 2020-06-26 | 杭州屹通新材料股份有限公司 | Preparation method of CuSn10 powder with low apparent density |
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| CN111659405A (en) * | 2020-07-08 | 2020-09-15 | 朱丽英 | Method for preparing copper-based catalyst by spray drying |
| CN112091208A (en) * | 2020-09-10 | 2020-12-18 | 安徽德诠新材料科技有限公司 | Heat-conducting copper powder with bimodal distribution characteristic and preparation method and application thereof |
-
2021
- 2021-06-02 CN CN202110614981.9A patent/CN115488330B/en active Active
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| CN1472367A (en) * | 2003-06-16 | 2004-02-04 | 昆明理工恒达科技有限公司 | Preparing method for conductive composite bronze powder and composite bronze conductive sizing agent |
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| CN115488330A (en) | 2022-12-20 |
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