CN103128288A - Metal crystal powder and production method and production device thereof - Google Patents
Metal crystal powder and production method and production device thereof Download PDFInfo
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- CN103128288A CN103128288A CN2011103730500A CN201110373050A CN103128288A CN 103128288 A CN103128288 A CN 103128288A CN 2011103730500 A CN2011103730500 A CN 2011103730500A CN 201110373050 A CN201110373050 A CN 201110373050A CN 103128288 A CN103128288 A CN 103128288A
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Abstract
The invention provides a production device for metal crystal powder. The production device comprises a casing, a feeding port, an air inlet, an air outlet, an gas flow driving device and a guide device, wherein the a working cavity is formed in the casing, the feeding port is arranged on a casing wall and is used for enabling raw material particles for producing the metal crystal powder to pass through and enter the working cavity, the air inlet and the air outlet are arranged on the casing wall and are communicated with gas of the working cavity, the gas flow driving device can drive gas flow in the working cavity to flow in an actuating mode, at least a part of the guide device is arranged in the working cavity and can be driven to drive the gas flow to flow according to a specified form. The production device is small in investment, low in production cost and high in effective powder yield. Simultaneously, the invention further relates to a production method utilizing the production device and the metal crystal powder produced through the method. The metal crystal powder is in a spherical shape or a shape like a sphere and simultaneously contains large amount of lattice imperfection which facilitates atomic diffusion and greatly improves sintering activities of the powder.
Description
Technical field
The present invention relates to a kind of metallic crystal powder, relate in particular to a kind of metallic crystal powder with lattice defect.
The invention still further relates to a kind of production method and production equipment of producing the metallic crystal powder, relate in particular to production method and equipment that a kind of production has the metallic crystal powder of lattice defect.
Background technology
The metallic crystal powder is a kind of important raw material, and it all has a wide range of applications in a plurality of fields such as electronics industry, machinery manufacturing industry, auto industrys.The method of producing at present metal dust is divided into Physical and chemical method.
The method that Physical commonly used is produced the metallic crystal powder has aerosolization method, water atomization, centrifugal atomizing method, ball milling and the broken method of air-flow abrasive dust etc.
Aerosolization and water atomization are respectively to adopt air, nitrogen, helium, argon gas, water or oil to smash the metal fluid of melting, and the metal fluid of melting is cooling and form metal dust fast.
Centrifugal atomizing is block materials to be sent into make it in flame passes to melt at a terrific speed, and the drop of motlten metal scatters to and is fragmented into granule on substrate.
Ball-milling method is that the bulky grain metal dust is stirred for a long time or mixes with the abrading-ball medium, and the bulky grain metallic particles is broken into tiny particle under the impact of abrading-ball and extruding.
Airflow milling is the mode of impacting by high velocity air, makes the collision of coarse grain powder and working cavity inwall, or makes collision mutually between coarse grain powder, and is cracked into tiny particle, and airflow milling is the effective ways of preparation fragile powder.
Although said method has all obtained application in various degree in actual production, these methods all exist certain defective separately:
The light water atomizing metal dust that can be mass-produced, but powder diameter wider range of its production, particle size is larger.Need adopt hydraulic atomized equipment as producing more tiny powder (as particle diameter＜30 μ m), this equipment investment is large, and the fine powder productive rate is lower.Simultaneously, the ratio of water atomized powder groupization particle is high, out-of-shape, and apparent density and tap density are low, and injection moulding and the agglutinating property of injection-molded product all had adverse influence.
The aerosolization method can be produced the following metal dust of 30 μ m, need in production process to adopt air, argon gas or nitrogen to atomize, because fine powder productive rate lower cost is high, though the powder shape subglobular, but because the surface of its powder of factor of slow cooling can be low, sintering activity is general.
The centrifugal atomizing method can prepare the small sized metallic powder, but equipment cost is high, and production efficiency is low, is unsuitable for large-scale production.
Ball-milling method technique is simple, and equipment cost is low, the metal dust out-of-shape that adopts the method to make, and even slabbing, easily occur between powder and powder to reunite and seam, and adopt ball-milling method can't effectively produce submicron metal.
Impulsive force and attack time that in the airflow milling process, the powder top layer is subject to are limited, cause breaking capacity high to toughness or the metal material that ductility is good limited, and can't obtain the super-fine globular metal dust.
The method that adopts chemical method to produce metal dust is liquid-phase precipitation method.Liquid-phase precipitation method is with substance dissolves such as nitrate, chloride, hydroxide or sulfide, then precipitates in solution by processing, and obtains powder.But the powder that liquid phase reduction makes is easily reunited, and packed density is low, and output is limited, can't satisfy the requirement of injection-molded product.
In view of this, be necessary the method for above-mentioned production metal dust is improved, to address the above problem.
Summary of the invention
One of purpose of the present invention is to provide a kind of production equipment, and this production equipment can be produced has the metallic crystal powder that high surface energy while top layer has lattice defect, and this investment of production equipment is little, production cost is low, the effect powder productive rate is high.
Another object of the present invention is to provide a kind of production method of utilizing above-mentioned production equipment to produce the metallic crystal powder, the method technique is simple, and productive rate is high, can produce the metallic crystal powder with high sintering activity.
The present invention also provides a kind of metallic crystal powder of being produced by above-mentioned production equipment and production method, and this metallic crystal powder top layer has lattice defect, and the surface can be high simultaneously, and sintering activity is good.
One of for achieving the above object, the production equipment of a kind of metallic crystal powder of the present invention, this production equipment comprises:
Housing is formed with working cavity in it;
Charging aperture is arranged on described housing wall, be used for for the feed particles of producing the metallic crystal powder by and enter in working cavity;
Air inlet and air outlet are arranged on described housing wall, and are communicated with described working cavity gas;
Air flow drive device, but the interior air-flow of its start described working cavity of ground driving is mobile;
Guiding device, at least part of being arranged in described working cavity, and can be actuated to be with moving air flow to flow by particular form.
As a further improvement on the present invention, described air flow drive device comprises centrifugal blower, and it is connected with described air outlet.
As a further improvement on the present invention, described guiding device comprises revolving part and is used for driving the motor of described revolving part, and described revolving part rotates to drive air-flow and flows by spiral way.
As a further improvement on the present invention, described air inlet is positioned at the below of housing, and described air outlet is positioned at the top of housing.
One of for achieving the above object, a kind of method that adopts above-mentioned production equipment to prepare the metallic crystal powder of the present invention, the method comprises the steps:
The feed particles of metallic crystal powder is provided, and sends into described feed particles in the working cavity of production equipment by charging aperture;
Input gas by air inlet in working cavity, and start air flow drive device and the specific duration of guiding device, so that gas forms spiral air flow in described working cavity;
Described feed particles is with spiral air flow motion and with inner walls or produce each other collision, and under impact and shearing force effect, the top layer produces a large amount of crystal defects, these crystal defects have promoted the formation of crackle, thereby further quick crashing is to several granules, and final formation has the spherical of lattice defect or class spherical metal crystal powder.
As a further improvement on the present invention, described gas is selected from air, inert gas or nitrogen.
As a further improvement on the present invention, the scope of described specific duration is: 1 ~ 30min; Be preferably: 5 ~ 15min.
One of for achieving the above object, a kind of metallic crystal powder of the present invention, this metallic crystal powder morphology is spherical or class is spherical, and its particle surface has plastic deformation, comprises lattice defect, and has high surface energy.
As a further improvement on the present invention, the apparent density scope of described metallic crystal powder is: 3.5 ~ 5.5g/cm
3The tap density scope is: 4.0 ~ 5.8 g/cm
3
As a further improvement on the present invention, the average particle size range of described metallic crystal powder particle is: 0.1 ~ 500 μ m; Be preferably: 20 ~ 30 μ m.
Compared with prior art, the invention has the beneficial effects as follows:
The metallic crystal powder particle surface produces plastic deformation, and then causes its surface that a large amount of lattice defect (as dislocation) is arranged, and for the diffusive migration of atom provides passage, makes its easy-sintering.This metallic crystal powder has high surface energy simultaneously.
Metallic crystal powder of the present invention is spherical or close to spherical, inside is closely knit, has high apparent density and tap density.Have good dispersiveness between the metallic crystal powder, do not occur between them to reunite and adhesion.
Metal dust with above characteristic can be used to prior powder metallurgy part, injection moulding part, electric capacity, electrically and thermally conductive adhesive and electromagnetic shielding material.
For the metallic crystal powder of easy generation oxidation, production method of the present invention can be utilized inert gas protection.
Simultaneously, this production method technique is simple, and productive rate is high.Adopt this kind method to carry out fragmentation to fragility and the good metallic crystal powder of ductility, it can be crushed to below 5 μ m, the fine powder productive rate is high.
The inventive method investment of production equipment used is little, and production cost is low, and the effect powder productive rate is high.
Description of drawings
Fig. 1 is a specific embodiment schematic diagram of production equipment of the present invention;
Fig. 2 is the shape appearance figure of metallic crystal powder one specific embodiment of the present invention;
Fig. 3 is 1000 times of enlarged drawings of metallic crystal powder shown in Figure 2.
The specific embodiment
The present invention will be described in detail below in conjunction with the specific embodiment, but these embodiments do not limit the present invention, and equivalent transformation and equivalent substitution that those of ordinary skills do according to these embodiments all are included in protection scope of the present invention.
As shown in Figure 1, a specific embodiment schematic diagram for production equipment of the present invention, this production equipment 100 is for the production of the metallic crystal powder with lattice defect, and it comprises: housing 110, working cavity 120, charging aperture 114, air inlet 113, air outlet 111, air flow drive device 130, guiding device 140.
Air flow drive device 130, but start ground drives flowing of described working cavity 120 interior air-flows, it comprises centrifugal blower 131, this centrifugal blower 131 is connected by pipeline with above-mentioned air outlet 111.
In present embodiment, guiding device 140 is positioned at the bottom of working cavity 120, and can be actuated to be with moving air flow to flow by particular form.It comprises: revolving part 141 and be used for driving the motor 142 of described revolving part 141, in present embodiment, revolving part is that above-mentioned revolving part 141 rotates to drive air-flow and flows by spiral way.
The below is elaborated in conjunction with specific embodiments for production method of the present invention, and this production method embodiment utilizes the production equipment of a upper specific embodiment to realize.
Production method of the present invention can production the top layer have the metallic crystal powder of lattice defect, this production method comprises the steps:
Be provided for producing the feed particles of metallic crystal powder, for through the preliminary coarse granule of pulverizing, described coarse granule sent in the working cavity of production equipment in present embodiment;
Input gas by air inlet in working cavity, start air flow drive device and the specific duration of guiding device of described production equipment, the scope of specific duration is: 1 ~ 30min is preferably 5 ~ 15 min.Inside at described production equipment forms high speed whirlwind;
Enter the coarse granule of production equipment under the high-speed rotary wind action, rotate in production equipment, form spiral movement locus.Simultaneously, between coarse granule, the inwall of coarse granule and production equipment housing produces long-time strong many times collision.Coarse granule is under strong impact and shearing force effect, the coarse granule top layer produces serious plastic deformation, it produces a large amount of crystal defects simultaneously, these crystal defects have promoted the formation of crackle and have made the coarse granule Plasticity Decreasing, thereby further quick crashing is to several granules, this granule in constantly distortion, coat, under broken circulation, form gradually tiny, spherical and have superfine spherical and/or the class spherical metal crystal powder of high surface energy and lattice defect.The gas of the formation high speed whirlwind in production equipment is discharged by this air outlet.
For the metallic crystal powder of easy oxidation, can adopt air, inert gas or inactive gas such as nitrogen to make whirlwind, to avoid the metallic crystal Powder Oxidation.
Be spherical or class is spherical at metallic crystal powder particle surface pattern of the present invention, the surface has plastic deformation simultaneously, comprises lattice defect, and has high surface energy.
The metallic crystal powder can be selected from the alloy of one or more compositions in copper, silver, nickel, aluminium, tin, iron or copper and nickel, zinc, tin, iron, phosphorus.
The apparent density scope of this metallic crystal powder is: 3.5 ~ 5.5g/cm
3The tap density scope is: 4.0 ~ 5.8 g/cm
3
Apparent density refer under rated condition powder freely the unit of filling hold the quality of agent.
Tap density refers to that the powder in container is through the measured density of jolt ramming under rated condition.
The average particle size range of above-mentioned metallic crystal powder is: 0.1 ~ 500 μ m, as a kind of preferred embodiment, this particle size range is: 20 ~ 30 μ m.
As shown in Figure 2, for metallic crystal powder one specific embodiment particle size range is the Copper Powder Surface shape appearance figure of 20 ~ 30 μ m, this copper powder is spherical or close to spherical, compares with existing copper powder, copper powder in this specific embodiment has higher apparent density and tap density, and is inner closely knit.Simultaneously, this copper powder good dispersion is without agglomeration.
As shown in Figure 3, be 1000 times of enlarged drawings, the surface of copper powder shown in figure produces plastic deformation, and comprises a large amount of lattice defects, and this is conducive to the diffusion of atom, has greatly improved the sintering activity of powder.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the situation that do not deviate from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, therefore is intended to include in the present invention dropping on the implication that is equal to important document of claim and all changes in scope.Any Reference numeral in claim should be considered as limit related claim.
In addition, be to be understood that, although this specification is described according to embodiment, but be not that each embodiment only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should make specification as a whole, and the technical scheme in each embodiment also can through appropriate combination, form other embodiments that it will be appreciated by those skilled in the art that.
Claims (10)
1. the production equipment of a metallic crystal powder, is characterized in that, this production equipment (100) comprising:
Housing (110) is formed with working cavity (120) in it;
Charging aperture (114) is arranged on described housing (110) wall, be used for for the feed particles of producing the metallic crystal powder by and enter in working cavity (120);
Air inlet (113) and air outlet (111) are arranged on described housing (110) wall, and are communicated with described working cavity (120) gas;
Air flow drive device (130), but the interior air-flow of its start ground driving described working cavity (120) is mobile;
Guiding device (140), at least part of being arranged in described working cavity (120), and can be actuated to be with moving air flow to flow by particular form.
2. production equipment according to claim 1, it is characterized in that: described air flow drive device (130) comprises centrifugal blower (131), it is connected with described air outlet (111).
3. production equipment according to claim 1 is characterized in that: described guiding device (140) comprises revolving part (141) and is used for driving the motor (142) of described revolving part, and described revolving part (141) rotation is flowed by spiral way to drive air-flow.
4. production equipment according to claim 1, it is characterized in that: described air inlet (113) is positioned at the below of housing, and described air outlet (111) is positioned at the top of housing.
5. an employing production equipment as described in any one in claim 1 ~ 4 prepares the method for metallic crystal powder, it is characterized in that, the method comprises the steps:
The feed particles of metallic crystal powder is provided, and sends into described feed particles in the working cavity of production equipment by charging aperture;
Input gas by air inlet in working cavity, and start air flow drive device and the specific duration of guiding device, so that gas forms spiral air flow in described working cavity;
Described feed particles is with spiral air flow motion and with inner walls or produce each other collision, and under impact and shearing force effect, the top layer produces a large amount of crystal defects, these crystal defects have promoted the formation of crackle, thereby further quick crashing is to several granules, and final formation has lattice defect, spherical or class spherical metal crystal powder.
6. production method according to claim 5, it is characterized in that: described gas is selected from air, inert gas or nitrogen.
7. production method according to claim 5, it is characterized in that: the scope of described specific duration is: 1 ~ 30min; Be preferably: 5 ~ 15 min.
8. metallic crystal powder, it is characterized in that: this metallic crystal powder morphology is spherical or class is spherical, and its particle surface has plastic deformation, comprises lattice defect, and has high surface energy.
9. metallic crystal powder according to claim 8, it is characterized in that: the apparent density scope of described metallic crystal powder is: 3.5 ~ 5.5g/cm
3The tap density scope is: 4.0 ~ 5.8 g/cm
3
10. metallic crystal powder according to claim 8, it is characterized in that: the average particle size range of described metallic crystal powder particle is: 0.1 ~ 500 μ m; Be preferably: 20 ~ 30 μ m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103730500A CN103128288A (en) | 2011-11-22 | 2011-11-22 | Metal crystal powder and production method and production device thereof |
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| CN2011103730500A CN103128288A (en) | 2011-11-22 | 2011-11-22 | Metal crystal powder and production method and production device thereof |
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| CN103128288A true CN103128288A (en) | 2013-06-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108163A (en) * | 2015-09-09 | 2015-12-02 | 元磁新型材料(苏州)有限公司 | Copper powder used for ultrathin vapor chamber and manufacturing method thereof |
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| JPS6365003A (en) * | 1986-09-08 | 1988-03-23 | Showa Denko Kk | Method and device for pulverizing |
| CN2235319Y (en) * | 1995-12-14 | 1996-09-18 | 罗克 | Adjustable spiral flow type no ball milling machine |
| CN2255311Y (en) * | 1996-10-04 | 1997-06-04 | 董建国 | Lower-driving vertical ball-free mill |
| CN2292610Y (en) * | 1997-04-18 | 1998-09-30 | 薛孝俊 | Vertical centrifugal grading material device |
| CN2329433Y (en) * | 1998-01-25 | 1999-07-21 | 淄博矿务局机械制造厂 | Unit contruction non-ball mill |
| CN2617465Y (en) * | 2003-04-30 | 2004-05-26 | 淄博先河机电有限责任公司 | Effective non-ball mill |
| CN1508070A (en) * | 2002-12-17 | 2004-06-30 | 丹东市化工研究所有限责任公司 | Method for preparing boron powder by combustion synthesis |
| CN1800422A (en) * | 2005-12-13 | 2006-07-12 | 浙江盈联科技有限公司 | Method for processing cobalt copper alloy |
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2011
- 2011-11-22 CN CN2011103730500A patent/CN103128288A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6365003A (en) * | 1986-09-08 | 1988-03-23 | Showa Denko Kk | Method and device for pulverizing |
| CN2235319Y (en) * | 1995-12-14 | 1996-09-18 | 罗克 | Adjustable spiral flow type no ball milling machine |
| CN2255311Y (en) * | 1996-10-04 | 1997-06-04 | 董建国 | Lower-driving vertical ball-free mill |
| CN2292610Y (en) * | 1997-04-18 | 1998-09-30 | 薛孝俊 | Vertical centrifugal grading material device |
| CN2329433Y (en) * | 1998-01-25 | 1999-07-21 | 淄博矿务局机械制造厂 | Unit contruction non-ball mill |
| CN1508070A (en) * | 2002-12-17 | 2004-06-30 | 丹东市化工研究所有限责任公司 | Method for preparing boron powder by combustion synthesis |
| CN2617465Y (en) * | 2003-04-30 | 2004-05-26 | 淄博先河机电有限责任公司 | Effective non-ball mill |
| CN1800422A (en) * | 2005-12-13 | 2006-07-12 | 浙江盈联科技有限公司 | Method for processing cobalt copper alloy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108163A (en) * | 2015-09-09 | 2015-12-02 | 元磁新型材料(苏州)有限公司 | Copper powder used for ultrathin vapor chamber and manufacturing method thereof |
| CN105108163B (en) * | 2015-09-09 | 2017-12-26 | 元磁新型材料(苏州)有限公司 | A kind of ultra-thin soaking plate copper powder and preparation method thereof |
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Application publication date: 20130605 |