CN101279373A - Device for preparing nano granule by twice coulomb fissions - Google Patents
Device for preparing nano granule by twice coulomb fissions Download PDFInfo
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- CN101279373A CN101279373A CNA2007100606505A CN200710060650A CN101279373A CN 101279373 A CN101279373 A CN 101279373A CN A2007100606505 A CNA2007100606505 A CN A2007100606505A CN 200710060650 A CN200710060650 A CN 200710060650A CN 101279373 A CN101279373 A CN 101279373A
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- control system
- vacuum chamber
- microcomputer
- nozzle
- quartz capillary
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Abstract
The invention discloses a device for preparing nanoparticles by secondary coulombic fission, which comprises: (a) a feeding device; (b) a quartz capillary, one end of which is provided with a capillary that is internally provided with a tungsten electrode and is embedded with a nozzle at the bottom end; (c) a vacuum cavity, the interior of the vacuum cavity which is arranged at the lower part of the nozzle of the quartz capillary is sequentially provided with a charging polar plate, a baffle plate and a particle cooling and collection device which are connected with a power supply by guide wires; the device also includes (d) a microcomputer control system; (e) a frequency flasher and a camera device, which are respectively connected with the microcomputer control system. The device of the invention for preparing the nanoparticles by the secondary coulombic fission has strong process controllability; the flow rate of melt (liquid) and the voltage between the quartz capillary and the polar plate can be controlled, the micro-particles with even size can be obtained by utilizing an image surveillance system and a loop feedback control system, the process flow is short, the product quality is good and the equipment investment is greatly reduced.
Description
Technical field
The present invention relates to prepare the device of nano particle, relate in particular to a kind of device of preparing nano granule by twice coulomb fissions.
Background technology
According to Rayleigh unstability principle, when the disturbance of liquid surface electric charge and surface tension ratio surpassed the Rayleigh limit, spontaneous coulomb of division will take place in liquid.
Present conventional particles technology of preparing, the particle size of producing as aerosolization, vibrating prilling etc. is all in micron or sub-micrometer scale, and size distribution is inhomogeneous.The symmetrical liquid drop injecting technology that rise the beginning of the nineties can be produced uniform alloying pellet, but because the restriction of jet stability and technology, it is difficult to produce the following particle of micron order.
Summary of the invention
The object of the present invention is to provide a kind of short flow process, the high efficiency device that can obtain a kind of preparing nano granule by twice coulomb fissions of nanoscale ultramicro powder.
It comprises the device of a kind of preparing nano granule by twice coulomb fissions of the present invention:
(a) feeding device;
(b) quartz capillary is equipped with flowmeter on this capillary, and the one end links to each other with described feeding device, tungsten electrode is housed in the pipe of the other end and is inlaid with a nozzle in this pipe bottom;
(c) vacuum chamber, the port of export of described quartz capillary is arranged in the described vacuum chamber, in the vacuum chamber of the nozzle bottom of described quartz capillary, be equipped with one successively and add battery lead plate, baffle plate, particle cooling gathering-device by what lead linked to each other with power supply, there is an opening the described battery lead plate centre that adds with respect to described nozzle place, and described vacuum chamber is connected with vavuum pump, inertia source of the gas by pipeline respectively;
(d) Control System of Microcomputer, this Control System of Microcomputer comprises mainboard, be connected signal generator and image pick-up card on the described mainboard by control line respectively, described flowmeter and the power supply that adds battery lead plate link to each other with mainboard in the Control System of Microcomputer by lead respectively;
(e) one is dodged device frequently, and this sudden strains of a muscle frequency device is installed on the sidewall of described vacuum chamber and by line and is connected with frequency divider, and described frequency divider links to each other with signal generator in the Control System of Microcomputer;
(f) camera head, this camera head be installed in the described sidewall that dodges the vacuum chamber of device opposite position frequently on and link to each other with image pick-up card in the Control System of Microcomputer by line.
The device of a kind of preparing nano granule by twice coulomb fissions of the present invention, process controllability is strong, can control voltage between melt (liquid) flow and quartz capillary and pole plate, utilize image monitoring system and circuit feedback control system to obtain the microparticle of uniform-dimension, technological process is short, good product quality greatly reduces equipment investment.
Description of drawings
Accompanying drawing is the apparatus structure schematic diagram of a kind of preparing nano granule by twice coulomb fissions of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done to describe in detail.
The feeding device 1 that comprises of the present invention as shown in the figure, vacuum chamber 2, flowmeter 5, quartz capillary 6 has tungsten electrode 7, baffle plate 10, gathering-device 11 in the quartz capillary.There is the battery lead plate of adding 8 quartz capillary 6 belows, quartz capillary 6 and add 8 of battery lead plates and be added with high voltage electric field by high voltage source.Quartz capillary 6 one ends link to each other with described feeding device 1, tungsten electrode 7 is housed in the pipe of the other end and in this pipe bottom a nozzle is arranged; Described nozzle adopt exotic material and under hot conditions deformation quantity less, preferably make and its diameter is 1um-100um by sapphire.The bottom of vacuum chamber 2 is provided with particle cooling gathering-device 11, and a baffle plate 10 is arranged on the gathering-device 11, is fixed on the bottom of vacuum chamber 2.Vacuum chamber 2 bottom righthand sides are connected with vavuum pump 3, and vacuum chamber 2 sidewalls are connected with inertia source of the gas 4 by appendix.With respect to described nozzle place an opening is arranged in the middle of adding battery lead plate 8, add battery lead plate 8 and be connected with power supply 12 by line.Power supply 12 is connected with mainboard 17 in the Control System of Microcomputer by line.Vacuum chamber 2 left side walls have one to dodge device 9 frequently, are connected with frequency divider 13 by line, and frequency divider 13 is connected with signal generator 15 in the Control System of Microcomputer 18.Device 9 opposite positions have camera head 16 with dodging frequently on vacuum chamber 2 right sides, are connected with image pick-up card 14 in the microcomputer control equipment 18 by line.Control System of Microcomputer 18 critical pieces include signal generator 15, image pick-up card 14 and mainboard 17.Signal generator 15 and image pick-up card 14 are connected on the computer motherboard 17 by control line respectively.Keep the pressure in the feeding device to be higher than vacuum chamber in the use from nozzle so that liquid flows out.
The method of operating of apparatus of the present invention is as follows:
(1) in feeding device, make raw material become melt or liquid condition;
(2) cooling fluid is added in the gathering-device, baffle plate is moved to the top of gathering-device and sealed vacuum chamber;
(3) crucible and vacuum chamber are vacuumized, and charge into inert protective gas;
(4) beat high voltage source, at quartz capillary and add and add high voltage between battery lead plate, by computer system control flowmeter and high voltage source, a coulomb division forms initial main droplet to make liquid surface take place once;
(6) utilize the captured drop image of image monitoring system to calculate the diameter of drop accurately in conjunction with computer aided video system, thereby FEEDBACK CONTROL is adjusted flowmeter and high-voltage power supply, thereby makes initial main droplet generation secondary coulomb division obtain the nanoscale drop of uniform-dimension.
(7) remove baffle plate, drop enters gathering-device, by the moulding of cooling fluid final set.
Claims (2)
1. the device of a preparing nano granule by twice coulomb fissions is characterized in that it comprises:
(a) feeding device;
(b) quartz capillary is equipped with flowmeter on this capillary, and the one end links to each other with described feeding device, tungsten electrode is housed in the pipe of the other end and is inlaid with a nozzle in this pipe bottom;
(c) vacuum chamber, the port of export of described quartz capillary is arranged in the described vacuum chamber, in the vacuum chamber of the nozzle bottom of described quartz capillary, be equipped with one successively and add battery lead plate, baffle plate, particle cooling gathering-device by what lead linked to each other with power supply, there is an opening the described battery lead plate centre that adds with respect to described nozzle place, and described vacuum chamber is connected with vavuum pump, inertia source of the gas by pipeline respectively;
(d) Control System of Microcomputer, this Control System of Microcomputer comprises mainboard, be connected signal generator and image pick-up card on the described mainboard by control line respectively, described flowmeter and the power supply that adds battery lead plate link to each other with mainboard in the Control System of Microcomputer by lead respectively;
(e) one is dodged device frequently, and this sudden strains of a muscle frequency device is installed on the sidewall of described vacuum chamber and by line and is connected with frequency divider, and described frequency divider links to each other with signal generator in the Control System of Microcomputer;
(f) camera head, this camera head be installed in the described sidewall that dodges the vacuum chamber of device opposite position frequently on and link to each other with image pick-up card in the Control System of Microcomputer by line.
2. the device of a kind of preparing nano granule by twice coulomb fissions according to claim 1, it is characterized in that: described nozzle is made by sapphire and its diameter is 1um-100um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710060650A CN101279373B (en) | 2007-12-28 | 2007-12-28 | Device for preparing nano granule by twice coulomb fissions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710060650A CN101279373B (en) | 2007-12-28 | 2007-12-28 | Device for preparing nano granule by twice coulomb fissions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101279373A true CN101279373A (en) | 2008-10-08 |
| CN101279373B CN101279373B (en) | 2010-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710060650A Expired - Fee Related CN101279373B (en) | 2007-12-28 | 2007-12-28 | Device for preparing nano granule by twice coulomb fissions |
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| CN (1) | CN101279373B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972723A (en) * | 2010-08-30 | 2011-02-16 | 顾文华 | Multi-stage electrostatic spraying system and method |
| CN103042222A (en) * | 2013-01-29 | 2013-04-17 | 武汉科技大学 | Device for preparing fine crystal powder based on electrostatic spraying, and using method thereof |
| CN112159211A (en) * | 2020-09-30 | 2021-01-01 | 武汉理工大学 | Preparation method of high-density, high-hardness and sub-millimeter-scale alumina ceramic ball |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5266098A (en) * | 1992-01-07 | 1993-11-30 | Massachusetts Institute Of Technology | Production of charged uniformly sized metal droplets |
| GB9515439D0 (en) * | 1995-07-27 | 1995-09-27 | Isis Innovation | Method of producing metal quantum dots |
| CN2649227Y (en) * | 2003-08-21 | 2004-10-20 | 吴萍 | Metal uniform particle generator |
-
2007
- 2007-12-28 CN CN200710060650A patent/CN101279373B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972723A (en) * | 2010-08-30 | 2011-02-16 | 顾文华 | Multi-stage electrostatic spraying system and method |
| CN101972723B (en) * | 2010-08-30 | 2012-10-31 | 顾文华 | Multi-stage electrostatic spraying system and method |
| CN103042222A (en) * | 2013-01-29 | 2013-04-17 | 武汉科技大学 | Device for preparing fine crystal powder based on electrostatic spraying, and using method thereof |
| CN103042222B (en) * | 2013-01-29 | 2014-12-03 | 武汉科技大学 | Device for preparing fine crystal powder based on electrostatic spraying, and using method thereof |
| CN112159211A (en) * | 2020-09-30 | 2021-01-01 | 武汉理工大学 | Preparation method of high-density, high-hardness and sub-millimeter-scale alumina ceramic ball |
| CN112159211B (en) * | 2020-09-30 | 2024-02-06 | 武汉理工大学 | Preparation method of high-density high-hardness submillimeter-grade alumina ceramic balls |
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| Publication number | Publication date |
|---|---|
| CN101279373B (en) | 2010-05-19 |
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Granted publication date: 20100519 Termination date: 20101228 |