CN101318219A - Nano-powder machine - Google Patents
Nano-powder machine Download PDFInfo
- Publication number
- CN101318219A CN101318219A CNA2007100235577A CN200710023557A CN101318219A CN 101318219 A CN101318219 A CN 101318219A CN A2007100235577 A CNA2007100235577 A CN A2007100235577A CN 200710023557 A CN200710023557 A CN 200710023557A CN 101318219 A CN101318219 A CN 101318219A
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- vacuum chamber
- crucible
- layer sleeve
- nano
- plasma
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Abstract
The invention relates to a powder processing device, in particular to a device for a nanometer powder machine. The device comprises a vacuum chamber, a crucible which is arranged in the vacuum chamber, a plasma generating device, a particle collecting device and a cold water circulating system. The plasma generating device is an external high-frequency arc starting device, and the plasma spaying gun of the plasma generating device extends above of the crucible in the vacuum chamber from the wall of the vacuum chamber. The particle collecting device comprises a double-layer sleeve and a negative pressure extracting device which is arranged at the lower part of the double-layer sleeve; the double-layer sleeve is arranged around the crucible in the vacuum chamber, and the negative pressure extracting device is arranged outside the vacuum chamber; the cavity of the double-layer sleeve is communicated with cooling fluid, and the outer wall of the double-layer sleeve is provided with a condensing tube. To prepare nanometer metal powder with low melting point, the top of the vacuum chamber is also provided with a cathode which can move up and down. The gas phase outlet of the particle collecting device is communicated with the vacuum chamber by a circulating pump.
Description
Technical field
The present invention relates to a kind of device of producing nano metal powder, relate in particular to a kind of device for preparing nano-powder with plasma.
Background technology
Nano metal material has performance that other materials is beyond one's reach because particle is small, in fields such as powder metallurgy, fine chemistry industry, electronic information wide prospect is arranged.The method of producing nano metal powder at present mainly contains chemical method (as electrolysis and hydroxyl thermal decomposition method water slurry pressurised oxygen reducing process etc.) and physical method (laser method and plasma method), wherein plasma method production nano metal powder is to utilize high frequency electric source discharge generation plasma arcs to be thermal source, make metal vaporization evaporation, again through gatherer cooling cohesion, thereby generation nano metal powder, because the nano metal powder output with the plasma method preparation is big, granularity is controlled easily, advantages such as powder characteristic is good, be used widely industrial, also give birth to the equipment of plasma production nano metal powder accordingly with regard to application.Also there is following shortcoming in existing nano metal powder machine: the relative position between plasma gun and the crucible can not be regulated; The particle of the metal-powder of producing is bigger, more than 100um, is not the technology of preparing of proper nano-powder mostly.
Summary of the invention
The device that the purpose of this invention is to provide a kind of nano-powder machine, the relative position between this device plasma gun and crucible is adjustable, and the nano metal powder particle grain size distribution is below 100um, particle diameter evenly, no cluster phenomenon.
Purpose of the present invention can realize by following measure:
A kind of device of nano-powder machine, comprise vacuum chamber, be located at crucible, plasma generating device, particle collection device and the cold water circulatory system etc. in the vacuum chamber, described plasma generating device is external high-frequency arc strike device, and its plasma spraying gun extend into crucible top in the vacuum chamber by vacuum-chamber wall.Described particle collection device comprises double layer sleeve barrel and is located at the negative pressure extracting device of double layer sleeve barrel bottom; Described two layered cylinder places around the interior crucible of described vacuum chamber, and described negative pressure extracting device is positioned at outside the vacuum chamber; The cavity of described two layered cylinder is communicated with cooling fluid, and its outer wall is provided with condenser pipe.In order to produce the low-melting-point nano metal-powder, also be provided with negative electrode moving up and down at the top of above-mentioned vacuum chamber.The gaseous phase outlet of described particle collection device is by circulating pump and vacuum chamber.
Operation principle of the present invention is as follows: in the indoor low pressure inert protective atmosphere that charges into of vacuum reaction, utilize high frequency electric source and dc source, produce stable inert mixed gas hot plasma between plasma gun and cold-crucible.The mechanical compress that this plasma produces when being subjected to through the inner chamber of plasma spraying gun water-cooled nozzle simultaneously, the three kinds of pinch effects of electromagnetism compression that produce when the cold compression of recirculated water and gas and discharge, make the free electric arc between anode and cathode be compressed into high temperature, the high ionization degree, the plasma of high-energy-density, when this high-energy-density hot plasma (central temperature reaches 40000K) acts on the high pure metal raw material of anode, produce metal atmosphere plasma, this plasma is in diffusion process, fierce collision takes place in continuous and intert-gas atoms, or utilize the rapid off-energy of chilling apparatus and cool off, this effective cooling procedure forms very high regional supersaturation district in metal vapors, make the metal vapors cooling, white hair nucleation and cohesion grow into the ultra micron cluster from gas phase, after cluster forms, by the gaseous exchange effect supersaturation district that speeds away, be deposited at last on the wall of particle collection device.
The present invention compared with prior art has the following advantages:
1, the present invention adopts the plasma spraying gun of high-frequency arc strike device and special construction, the plasma arcs that high frequency electric source is produced carries out space constraint, make plasma be subjected to cold compression, mechanical compress, three kinds of pinch effects of electromagnetism compression, free electric arc between the anode and cathode is compressed into the plasma of high temperature, high ionization degree, high-energy-density, temperature can reach more than the 30000K, and thermal power density is up to 10
4W/cm
2, can make the refractory metal evaporation of fully vaporizing, produce metal-powder.
2, superhigh temperature evaporation thermal source of the present invention and two extreme parameters of chilling apparatus have realized that continuously adjustable temperature field distributes and thermograde, is generally 10
2-10
6K/m, cooling velocity height (can reach 100K/S), the plasma temperature distributed areas are little, nucleation rate is big, help forming superfine, high performance metal nanoparticle.
3, the present invention is external high-frequency arc strike device, and the relative position between its plasma gun and the crucible, angle all can change freely.
4, metal powder grain of the present invention produces in the low pressure inert protective gas, and powder purity height is the standard sphere; Again because it generates the well-crystallized under accurate thermal equilibrium state.
5, the present invention can be applicable to producing of various metals that are evaporated and compound ultra micro powder thereof as required by optimizing the size and the performance of technological parameter control nano-powder.
6, technology of the present invention is simple, easy to operate, productive rate is high, and to the geometry of raw material metal without limits, does not produce waste material.
Description of drawings
Fig. 1 is a structure principle chart of the present invention
Concrete true mode
With reference to Fig. 1, a kind of device of nano-powder machine comprises vacuum chamber 1, is located at crucible 2, plasma generating device 3, particle collection device 4 and the cold water circulatory system 10 etc. in the vacuum chamber 1.Particle collection device 4 comprises double layer sleeve barrel 5 and is located at negative pressure extracting device 6 two parts of double layer sleeve barrel bottom, and wherein two layered cylinder 5 places around the crucible 2 in the vacuum chamber 1, and negative pressure extracting device 6 is arranged on outside the vacuum chamber 1; Plasma generating device 3 is external high-frequency arc strike device, and its rifle body extends to the top of crucible 2 by the wall of vacuum chamber 1 and sleeve 5; The cavity of above-mentioned double layer sleeve barrel 5 is communicated with cooling fluid, also is provided with condenser pipe 7 on its outer wall.In order to produce the low-melting-point nano metal-powder, be provided with negative electrode 8 moving up and down (tungsten filament or metal) at the top of vacuum chamber 1; The gaseous phase outlet of the negative pressure extracting device 6 of above-mentioned particle collection device is communicated with vacuum chamber 1 by circulating pump 9.The water cooled pipeline of the above-mentioned cold water circulatory system 10 can adopt the water power pipe.For the particle diameter of realizing the nano metal powder, the controllability of performance, the present invention also is provided with automaton, and on the diverse location of particle collection device 4 configuring plasma diagnostic system (not marking among the figure).
Claims (4)
1, a kind of device of nano-powder machine, comprise vacuum chamber (1), be located at crucible (2) plasma generating device (3), particle collection device (4) and the cold water circulatory system (10) etc. in the vacuum chamber (1), it is characterized in that: described plasma generating device (3) is external high-frequency arc strike device, and its plasma gun is extend into the top of crucible (2) by the wall of vacuum chamber (1).
2, the device of nano-powder machine as claimed in claim 1, it is characterized in that: described particle collection device (4) comprises double layer sleeve barrel (5) and is located at the negative pressure extracting device (6) of double layer sleeve barrel bottom, and two layered cylinder (5) places the interior crucible (2) of vacuum chamber (1) all around, and negative pressure extracting device (6) is located at outside the vacuum chamber (1); The cavity of described two layered cylinder (5) is communicated with cooling fluid, and its outer wall also is provided with condenser pipe (7).
3, the device of nano-powder machine as claimed in claim 1 or 2 is characterized in that: the napex of described vacuum chamber (1) is provided with negative electrode moving up and down (8).
4, the device of nano-powder machine as claimed in claim 1 is characterized in that: the gaseous phase outlet of described particle collection device (4) is communicated with vacuum chamber (1) by circulating pump (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100235577A CN101318219A (en) | 2007-06-08 | 2007-06-08 | Nano-powder machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100235577A CN101318219A (en) | 2007-06-08 | 2007-06-08 | Nano-powder machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101318219A true CN101318219A (en) | 2008-12-10 |
Family
ID=40178631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100235577A Pending CN101318219A (en) | 2007-06-08 | 2007-06-08 | Nano-powder machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101318219A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672192A (en) * | 2012-05-23 | 2012-09-19 | 兰州大学 | Automatic classified collection device for nanopowder |
| CN103157802A (en) * | 2011-12-09 | 2013-06-19 | 沈阳工业大学 | Equipment and method for rapid-situ-packaging rare earth nanometer powder arc process preparation |
| CN104325149A (en) * | 2014-11-21 | 2015-02-04 | 江永斌 | Device and method for adopting electronic reaction beam for making ultrafine metal powder |
| CN110000394A (en) * | 2019-05-29 | 2019-07-12 | 马榕彬 | A kind of metal nano powder production system |
-
2007
- 2007-06-08 CN CNA2007100235577A patent/CN101318219A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103157802A (en) * | 2011-12-09 | 2013-06-19 | 沈阳工业大学 | Equipment and method for rapid-situ-packaging rare earth nanometer powder arc process preparation |
| CN103157802B (en) * | 2011-12-09 | 2015-04-15 | 沈阳工业大学 | Equipment and method for rapid-situ-packaging rare earth nanometer powder arc process preparation |
| CN102672192A (en) * | 2012-05-23 | 2012-09-19 | 兰州大学 | Automatic classified collection device for nanopowder |
| CN102672192B (en) * | 2012-05-23 | 2014-03-26 | 兰州大学 | Automatic classified collection device for nanopowder |
| CN104325149A (en) * | 2014-11-21 | 2015-02-04 | 江永斌 | Device and method for adopting electronic reaction beam for making ultrafine metal powder |
| CN110000394A (en) * | 2019-05-29 | 2019-07-12 | 马榕彬 | A kind of metal nano powder production system |
| CN110000394B (en) * | 2019-05-29 | 2023-10-17 | 纳华(宁波)新材料科技有限公司 | Metal nano powder production system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081210 |