CN114082935A - Nano metal particle size screening device and method - Google Patents
Nano metal particle size screening device and method Download PDFInfo
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- CN114082935A CN114082935A CN202111363129.5A CN202111363129A CN114082935A CN 114082935 A CN114082935 A CN 114082935A CN 202111363129 A CN202111363129 A CN 202111363129A CN 114082935 A CN114082935 A CN 114082935A
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- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C7/00—Separating solids from solids by electrostatic effect
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
Abstract
The invention relates to the technical field of nano metal particle production, in particular to a nano metal particle size screening device and a nano metal particle size screening method. A nano metal particle size screening device comprises an electric spark ablation device and a screening device; the electric spark ablation device comprises an inert gas source, an ablation reaction container, a high-voltage electrostatic generator and two electrodes, wherein the two electrodes are oppositely arranged on the inner wall of the ablation reaction container, the two electrodes are respectively and electrically connected with the high-voltage electrostatic generator, and the ablation reaction container is communicated with the inert gas source. Nanometer metal particle size sieving mechanism can select the nanometer metal particle of particle size homogeneous, can realize the accurate screening of nanometer metal particle size, and the screening accuracy is high, effectively improves production efficiency and output, has solved current nanometer metal particle size sieving mechanism screening accuracy and has hanged down, the poor problem of screening effect.
Description
Technical Field
The invention relates to the technical field of nano metal particle production, in particular to a nano metal particle size screening device and a nano metal particle size screening method.
Background
The common preparation methods of the nano metal particles include a chemical reduction method, a vapor deposition method, a hydrothermal synthesis method, a sol-gel method, a photochemical method, a micro-emulsion method, a template method, a phase transfer method, an ultrasonic method, a radiation method and the like, and because the preparation process is easily influenced by reaction conditions and is difficult to accurately control, the methods are difficult to obtain the nano metal particles with uniform particle size.
Disclosure of Invention
Aiming at the problems brought forward by the background technology, the invention aims to provide a nano metal particle size screening device which can screen out nano metal particles with uniform particle size, can realize accurate screening of the size of the nano metal particles, has high screening accuracy and solves the problems of low screening accuracy and poor screening effect of the existing nano metal particle size screening device;
the invention also aims to provide a method for screening the size of the nano metal particles, which is used for preparing the nano metal particles by using an electric spark ablation method, has the advantages of simple equipment, easily obtained raw materials, low cost and easily controlled preparation conditions, realizes the size screening of the nano metal particles by using a plurality of electrode plates and screening pipelines, has high screening accuracy and high screening efficiency, and effectively improves the production efficiency and the yield.
In order to achieve the purpose, the invention adopts the following technical scheme:
a nano metal particle size screening device comprises an electric spark ablation device and a screening device;
the electric spark ablation device comprises an inert gas source, an ablation reaction container, a high-voltage electrostatic generator and two electrodes, wherein the two electrodes are oppositely arranged on the inner wall of the ablation reaction container, the two electrodes are respectively and electrically connected with the high-voltage electrostatic generator, and the ablation reaction container is communicated with the inert gas source;
the screening device comprises a screening pipeline and a plurality of electrode plates, the electrode plates are provided with through holes, and the screening pipeline sequentially penetrates through the through holes of the plurality of electrode plates;
the plurality of electrode plates are sequentially arranged on the screening pipeline in a straight line from left to right, and the screening pipeline is respectively provided with a particle deposition and collection platform on one surface of the left side of each electrode plate; the electrode plates are respectively and independently connected with power supplies with different voltages, the voltages are sequentially increased from left to right according to the movement direction of the nano metal particles, and the nano metal particles and the electrode plates have the same charges;
the inert gas source, the ablation reaction container and the screening pipeline are sequentially communicated and connected from left to right.
Further, the screening device further comprises a collecting box, the collecting box is communicated with the right end of the screening pipeline, and a particle deposition collecting platform is arranged in the collecting box.
Further, the electric spark ablation device further comprises an air inlet pipeline, one end of the air inlet pipeline is communicated with the air outlet end of the inert gas source, the other end of the air inlet pipeline is communicated with the air inlet end of the ablation reaction container, and the air inlet pipeline is provided with a one-way valve.
Further, the cross section of the screening pipeline is circular, the through hole of the electrode plate is circular, and the outer wall of the screening pipeline is attached to the wall of the through hole of the electrode plate.
A nano metal particle size screening method adopts the nano metal particle size screening device and comprises the following steps:
applying high-voltage static electricity with the same polarity to the two electrodes by using a high-voltage static electricity generator, applying pulse potential difference to the two electrodes, enabling the two electrodes to generate spark discharge, and preparing nano metal particles in an ablation reaction container, wherein the surfaces of the nano metal particles are charged with the same polarity as the high-voltage static electricity;
and (3) introducing inert gas into the ablation reaction container by using an inert gas source, enabling the prepared nano metal particles to enter a screening pipeline under the pushing of the inert gas flow, and adjusting the voltage of each electrode plate to collect the nano metal particles with different sizes on each particle deposition collection platform.
Stated further, the voltage setting of the electrode plate satisfies the following relation:
wherein rho is the density of the nano metal particles, V is the flow velocity of the inert gas in the nano metal particle size screening device, R is the size of the nano metal particles, K is the surface charge density of the charges carried by the nano metal particles, and the expression of K is
Wherein k is a proportionality coefficient, k is 0.5-2, and U0Is the voltage between the two electrodes, C is the equivalent capacitance of the spark erosion apparatus, and S is the cross-sectional area of the end faces of the two electrodes.
Further, the high-voltage static electricity applied to the two electrodes by using the high-voltage static electricity generator is positive or negative.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
the invention provides a nano metal particle size screening device which can screen out nano metal particles with uniform particle size, can realize accurate screening of the size of the nano metal particles through the relation between kinetic energy and electric potential energy of the nano metal particles in a screening channel, has high screening accuracy and solves the problems of low screening accuracy and poor screening effect of the existing nano metal particle size screening device;
the nano metal particle size screening method adopting the nano metal particle size screening device is further provided, the nano metal particles are prepared by using the electric spark ablation method, the equipment is simple, the raw materials are easy to obtain, the cost is low, the preparation conditions are easy to control, the size screening of the nano metal particles is realized by using the plurality of electrode plates and the screening pipeline, the screening accuracy is high, the screening efficiency is high, the production efficiency and the yield are effectively improved, the nano metal particle size screening method is particularly suitable for the industrial field, and the nano metal particle size screening method has a good industrialization prospect.
Drawings
FIG. 1 is a schematic structural diagram of a nano-metal particle size screening apparatus according to an embodiment of the present invention;
wherein: the device comprises an electric spark ablation device 1, an inert gas source 11, an ablation reaction container 12, a high-voltage electrostatic generator 13, an electrode 14, an air inlet pipeline 15, a one-way valve 151, a screening device 2, a screening pipeline 21, an electrode plate 22, a through hole 221, a particle deposition collecting platform 23 and a collecting box 24.
Detailed Description
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1, a nano metal particle size screening device comprises an electric spark ablation device 1 and a screening device 2;
the electric spark ablation device 1 comprises an inert gas source 11, an ablation reaction container 12, a high-voltage electrostatic generator 13 and two electrodes 14, wherein the two electrodes 14 are oppositely arranged on the inner wall of the ablation reaction container 12, the two electrodes 14 are respectively and electrically connected with the high-voltage electrostatic generator 13, and the ablation reaction container 12 is communicated with the inert gas source 11;
the screening device 2 comprises a screening pipeline 21 and a plurality of electrode plates 22, the electrode plates 22 are provided with through holes 221, and the screening pipeline 21 sequentially penetrates through the through holes 221 of the plurality of electrode plates 22;
the plurality of electrode plates 22 are sequentially arranged on the screening pipeline 21 in a straight line from left to right, and a particle deposition and collection platform 23 is respectively arranged on one side of the left side of each of the plurality of electrode plates 22 of the screening pipeline 21; the electrode plates 22 are respectively and independently connected with power supplies with different voltages, the voltages are sequentially increased from left to right according to the movement direction of the nano metal particles, and the nano metal particles and the electrode plates 22 have the same charges;
the inert gas source 11, the ablation reaction container 12 and the screening pipeline 21 are sequentially communicated and connected from left to right.
By arranging the electric spark erosion device 1 and the screening device 2, the electric spark erosion device 1 is used for preparing nano metal particles, specifically, a high-voltage electrostatic generator 13 is used for applying high-voltage static electricity (positive electricity or negative electricity) with the same polarity to two electrodes 14, a pulse potential difference is further applied to the two electrodes on the basis of the static electricity, so that the two electrodes 14 generate spark discharge, nano metal particles are prepared in an ablation reaction vessel 12, and the two electrodes 14 are charged with static electricity, so that the surfaces of the nano metal particles are charged with the same polarity as the high-voltage static electricity;
through setting up inert gas source 11, inert gas source 11 is used for to let in inert gas in ablation reaction vessel 12, the nano-metal granule that makes gets into under the air current of inert gas promotes in screening pipeline 21, because electrode plate 22 is equipped with through-hole 221, screening pipeline 21 passes a plurality of through-hole 221 of electrode plate 22 in proper order, through with electrode plate 22 nestification in screening pipeline 21, the simple structure of device, simple to operate, and conveniently realize in the device the position adjustment of electrode plate 22, through with a plurality of electrode plate 22 from left to right be linear array set up in screening pipeline 21, a plurality of electrode plate 22 is connected with the power of different voltages respectively, the nano-metal granule with electrode plate 22 has the same kind of electric charge, consequently there is the repulsion between the nano-metal granule with electrode plate 22, when the kinetic energy of the nano metal particles is greater than the potential energy between the nano metal particles and the electrode plates, the nano metal particles can pass through the electrode plates, when the kinetic energy of the nano metal particles is less than the potential energy between the nano metal particles and the electrode plates 22, the nano metal particles cannot pass through the electrode plates 22 and are deposited and collected on the particle deposition and collection platform 23 on the left side of the electrode plates 22, because the kinetic energy of the nano metal particles is proportional to the third power of the radius of the nano metal particles, and the electrode plates 22 are sequentially connected with voltages from small to large from left to right along the moving direction of the nano metal particles in the screening pipe 21, the nano metal particles with smaller radius are deposited on the particle deposition and collection platform 23 corresponding to the electrode plate 22 on the left side earlier, and the nano metal particles with larger radius are deposited on the particle deposition and collection platform 23 corresponding to the electrode plate 22 on the right side, by adjusting the voltage of each electrode plate 22, the nano-metal particles with different sizes are collected on each particle deposition and collection platform 23.
Nanometer metal particle size sieving mechanism can select the nanometer metal particle of particle size homogeneous, through the relation of the kinetic energy of nanometer metal particle in screening passageway 21 and electric potential energy, can realize the accurate screening of nanometer metal particle size, and the screening accuracy is high, has solved current nanometer metal particle size sieving mechanism screening accuracy and has hanged down, the poor problem of screening effect.
In a further description, the screening device 2 further comprises a collection box 24, the collection box 24 is communicated with the right end of the screening pipeline 21, and a particle deposition collection platform 23 is arranged in the collection box 24.
By arranging the collection box 24, the particle deposition collection platform 23 in the collection box 24 can collect the nano-metal particles which are not deposited on the plurality of particle deposition collection platforms 23 arranged in the electrode plate array of the screening pipeline 21, thereby completing screening and collection of the nano-metal particles with different sizes and ensuring that all the nano-metal particles manufactured by the electric spark erosion apparatus 1 are subjected to size screening.
In a further description, the electric spark ablation apparatus 1 further comprises an air inlet pipeline 15, one end of the air inlet pipeline 15 is communicated with the air outlet end of the inert gas source 11, the other end of the air inlet pipeline 15 is communicated with the air inlet end of the ablation reaction container 12, and the air inlet pipeline 15 is provided with a one-way valve 151.
By arranging the air inlet pipeline 15, the ablation reaction vessel 12 is communicated with the inert gas source 11 through the air inlet pipeline 15, the inert gas discharged from the inert gas source 11 can be conducted into the ablation reaction vessel 12, and furthermore, by arranging the check valve 151 on the air inlet pipeline 15, the check valve 151 is used for controlling the flow rate of the inert gas. Specifically, the inert gas is any one of helium, nitrogen and argon, and the inert gas source may be a steel cylinder storing the inert gas.
Preferably, the cross-sectional shape of the screening pipe 21 is circular, the through-hole of the electrode plate 22 is circular, and the outer wall of the screening pipe 21 is attached to the wall of the through-hole 221 of the electrode plate 22.
Through inciting somebody to action screening pipeline 21's cross sectional shape sets up to circular, and the nano-metal granule can be more smoothly under inert gas's the air current effect move in the screening pipeline 21, guarantee the accuracy nature of size screening, the cooperation screening pipeline 21's cross sectional shape, the shape of electrode plate 22's through-hole 221 is circular for simple to operate, just screening pipeline 21's outer wall with the pore wall of electrode plate 22's through-hole 221 is laminated mutually, improves installation stability.
A nano metal particle size screening method adopts the nano metal particle size screening device and comprises the following steps:
applying high-voltage static electricity with the same polarity to the two electrodes 14 by using a high-voltage static electricity generator 13, and applying pulse potential difference to the two electrodes 14 to enable the two electrodes 14 to generate spark discharge, so as to prepare nano metal particles in the ablation reaction vessel 12, wherein the surfaces of the nano metal particles are charged with the same polarity as the high-voltage static electricity;
inert gas is introduced into the ablation reaction vessel 12 by using an inert gas source 11, the prepared nano metal particles enter a screening pipeline 21 under the pushing of the inert gas flow, and the voltage of each electrode plate 22 is adjusted, so that the nano metal particles with different sizes are collected on each particle deposition and collection platform 23.
The method for preparing the nano metal particles by using the electric spark ablation has the advantages of simple equipment, easily obtained raw materials, low cost and easily controlled preparation conditions, realizes the size screening of the nano metal particles by using the plurality of electrode plates 22 and the screening pipeline 21, has high screening accuracy and high screening efficiency, effectively improves the production efficiency and the yield, is particularly suitable for the industrial field, and has better industrialization prospect.
To explain further, the voltage setting of the electrode plate 22 satisfies the following relation:
wherein rho is the density of the nano metal particles, V is the flow velocity of the inert gas in the nano metal particle size screening device, R is the size of the nano metal particles, K is the surface charge density of the charges carried by the nano metal particles, and the expression of K is
Wherein k is a proportionality coefficient, k is 0.5-2, and U is0Is the voltage between the two electrodes, C is the equivalent capacitance of the spark erosion apparatus, and S is the cross-sectional area of the end faces of the two electrodes.
Since the nano metal particles and the electrode plates 22 have the same charge, so that repulsion exists between the nano metal particles and the electrode plates 22, when the kinetic energy of the nano metal particles is greater than the electric potential between the nano metal particles and the electrode plates 22, the nano metal particles can pass through the electrode plates 22, and when the kinetic energy of the nano metal particles is less than the electric potential between the nano metal particles and the electrode plates 22, the nano metal particles cannot pass through the electrode plates 22 and are deposited and collected on the particle deposition and collection platform 23 on the left side of the electrode plates 22, since the kinetic energy of the nano metal particles is proportional to the third power of the radius of the nano metal particles, and the plurality of the electrode plates 22 are sequentially energized with voltages from small to large along the moving direction of the nano metal particles in the screening pipe 21, the nano metal particles with smaller radius are deposited earlier than the particle deposition and collection platform 23 corresponding to the electrode plate 22 on the left side, the bigger the radius of the nano metal particles is, the nano metal particles will be deposited on the particle deposition and collection platform 23 corresponding to the right electrode plate 22; by setting the voltage of the electrode plate 22 to satisfy the relation, the nano-metal particles having a radius smaller than R can be collected by the particle deposition collecting platform 23 at the left of the electrode plate 22.
Specifically, the high-voltage static electricity applied to the two electrodes 14 using the high-voltage static electricity generator 13 is either positive or negative.
The high-voltage static generator 13 is used for applying high-voltage static with the same polarity to the two electrodes 14, the high-voltage static is positive or negative, the two electrodes 14 are charged, so that the surface of the nano metal particle is charged with the same polarity as the high-voltage static, the electrode plates 22 are respectively connected with power supplies with different voltages, the nano metal particle and the electrode plates 22 are controlled to have the same charge, and repulsion exists between the nano metal particle and the electrode plates 22, so that the size screening of the nano metal particle is completed.
In order to facilitate an understanding of the present invention, a more complete description of the present invention is provided below. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Example 1
A method for screening the size of nano-metal particles, comprising the following steps:
applying positive high-voltage static electricity to the two electrodes 14 by using the high-voltage static electricity generator 13, simultaneously charging the two electrodes 14 with positive electricity, applying pulse potential difference to the two electrodes 14 to enable the two electrodes 14 to generate spark discharge, preparing nano metal particles in the ablation reaction container 12, and charging the prepared nano metal particles with positive charges, wherein the surface charge density of the charges charged in the nano metal particles is K;
inert gas is introduced into the ablation reaction vessel 12 by using an inert gas source 11, and the flow rate V of the inert gas11m/s, the prepared nano metal particles enter a screening pipeline 21 under the pushing of inert gas flow, and the voltage values of N electrode plates 22 are adjusted and set, wherein U is1＝5V、U2＝10V、U3＝15V、U4＝20V……UN＝X1V, N potential differences are formed between the electrode plate array and the nano metal particles, so that the radius is
The nano-metal particles are deposited on the particle deposition and collection platform 23 at the left side of the first electrode plate 22, and the radius is
The nano-metal particles are deposited on the particle deposition and collection platform 23 at the left side of the second electrode plate 22, and the radius is
The nano-metal particles are deposited on the particle deposition and collection platform 23 at the left side of the third electrode plate 22, and the radius is
The nano-metal particles will be deposited on the particle deposition and collection platform 23 at the left of the fourth electrode plate 22, and so on, with the radius of
Of the nano-metal particlesThe particles deposited on the particle deposit collecting platform 23 of the collecting bin 24 are collected.
Example 2
A method of screening the size of nano-metallic particles comprising the steps of:
applying positive high-voltage static electricity to the two electrodes 14 by using the high-voltage static electricity generator 13, simultaneously charging the two electrodes 14 with positive electricity, applying pulse potential difference to the two electrodes 14 to enable the two electrodes 14 to generate spark discharge, preparing nano metal particles in the ablation reaction container 12, and charging the prepared nano metal particles with positive charges, wherein the surface charge density of the charges charged in the nano metal particles is K;
inert gas is introduced into the ablation reaction vessel 12 by using an inert gas source 11, and the flow rate V of the inert gas22m/s, the prepared nano metal particles enter a screening pipeline 21 under the pushing of inert gas flow, and the voltage values of N electrode plates 22 are adjusted and set, wherein U is1＝10V、U2＝20V、U3＝30V、U4＝40V……UN＝X2V, N potential differences are formed between the electrode plate array and the nano metal particles, so that the radius is
The nano-metal particles are deposited on the particle deposition and collection platform 23 at the left side of the first electrode plate 22, and the radius is
The nano-metal particles are deposited on the particle deposition and collection platform 23 at the left side of the second electrode plate 22, and the radius is
The nano-metal particles are deposited on the particle deposition and collection platform 23 at the left side of the third electrode plate 22, and the radius is
The nano-metal particles will deposit on the particle deposition and collection platform 23 at the left of the fourth electrode plate 22, and so on, with the radius of
The nano-metal particles are collected and deposited on the particle deposition collecting platform 23 of the collecting box 24.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A nano metal particle size screening device is characterized by comprising an electric spark ablation device and a screening device;
the electric spark ablation device comprises an inert gas source, an ablation reaction container, a high-voltage electrostatic generator and two electrodes, wherein the two electrodes are oppositely arranged on the inner wall of the ablation reaction container, the two electrodes are respectively and electrically connected with the high-voltage electrostatic generator, and the ablation reaction container is communicated with the inert gas source;
the screening device comprises a screening pipeline and a plurality of electrode plates, the electrode plates are provided with through holes, and the screening pipeline sequentially penetrates through the through holes of the plurality of electrode plates;
the plurality of electrode plates are sequentially arranged on the screening pipeline in a straight line from left to right, and the screening pipeline is respectively provided with a particle deposition and collection platform on one surface of the left side of each electrode plate; the electrode plates are respectively and independently connected with power supplies with different voltages, the voltages are sequentially increased from left to right according to the movement direction of the nano metal particles, and the nano metal particles and the electrode plates have the same charges;
the inert gas source, the ablation reaction container and the screening pipeline are sequentially communicated and connected from left to right.
2. The nano-metal particle size screening apparatus of claim 1, further comprising a collection box in communication with the right end of the screening conduit and having a particle deposition collection platform disposed therein.
3. The nano-metal particle size screening apparatus of claim 1, further comprising an air inlet pipeline, wherein one end of the air inlet pipeline is communicated with the air outlet end of the inert gas source, the other end of the air inlet pipeline is communicated with the air inlet end of the ablation reaction vessel, and the air inlet pipeline is provided with a one-way valve.
4. The apparatus of claim 1, wherein the cross-sectional shape of the screening conduit is circular, the shape of the through-hole of the electrode plate is circular, and the outer wall of the screening conduit is fitted to the wall of the through-hole of the electrode plate.
5. A method for screening the size of nano-metal particles, which is characterized by adopting the nano-metal particle size screening device as claimed in any one of claims 1 to 4, and comprises the following steps:
applying high-voltage static electricity with the same polarity to the two electrodes by using a high-voltage static electricity generator, applying pulse potential difference to the two electrodes, enabling the two electrodes to generate spark discharge, and preparing nano metal particles in an ablation reaction container, wherein the surfaces of the nano metal particles are charged with the same polarity as the high-voltage static electricity;
and introducing inert gas into the ablation reaction container by using an inert gas source, enabling the prepared nano metal particles to enter a screening pipeline under the pushing of the inert gas flow, and adjusting the voltage of each electrode plate to collect the nano metal particles with different sizes on each particle deposition collection platform.
6. The method of claim 5, wherein the voltage settings of the electrode plates satisfy the following relationship:
wherein rho is the density of the nano metal particles, V is the flow velocity of the inert gas in the nano metal particle size screening device, R is the size of the nano metal particles, K is the surface charge density of the charges carried by the nano metal particles, and the expression of K is
Wherein k is a proportionality coefficient, k is 0.5-2, and U is0Is the voltage between the two electrodes, C is the equivalent capacitance of the spark erosion apparatus, and S is the cross-sectional area of the end faces of the two electrodes.
7. The method of claim 5, wherein the high-voltage static electricity applied to the two electrodes by the high-voltage static electricity generator is positive or negative.
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| CN111168077A (en) * | 2020-01-03 | 2020-05-19 | 广东工业大学 | Preparation system and preparation method of nano alloy material |
| WO2021136059A1 (en) * | 2020-01-03 | 2021-07-08 | 广东工业大学 | Preparation system and method capable of controlling size of nano-conductor/semiconductor material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040149132A1 (en) * | 2002-12-09 | 2004-08-05 | Hajrudin Pasic | Electrostatic sieving precipitator |
| US20090093105A1 (en) * | 2004-10-21 | 2009-04-09 | Hoya Corporation | Particle deposition apparatus, particle deposition method, and manufacturing method of light-emitting device |
| CN110862072A (en) * | 2019-11-07 | 2020-03-06 | 深圳第三代半导体研究院 | Preparation method of nano metal oxide material |
| CN111168077A (en) * | 2020-01-03 | 2020-05-19 | 广东工业大学 | Preparation system and preparation method of nano alloy material |
| WO2021136059A1 (en) * | 2020-01-03 | 2021-07-08 | 广东工业大学 | Preparation system and method capable of controlling size of nano-conductor/semiconductor material |
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