CN1060418A - Ultra-micro powder is separated and is reunited and the method for disperseing - Google Patents
Ultra-micro powder is separated and is reunited and the method for disperseing Download PDFInfo
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- CN1060418A CN1060418A CN 90108242 CN90108242A CN1060418A CN 1060418 A CN1060418 A CN 1060418A CN 90108242 CN90108242 CN 90108242 CN 90108242 A CN90108242 A CN 90108242A CN 1060418 A CN1060418 A CN 1060418A
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Abstract
The present invention relates to a kind of ultra-micro powder and separate the method for reuniting, in fine ceramics or electronic ceramics development, be used for the preparation of various metal oxide ultra-micro powders (tens to the hundreds of millimicron) with dispersion.The present invention will be dispersed with in sample chamber of iknsulating liquid Feng Shenggan of reunion powder, a basic discharge is set in sample chamber use the ball crack.A high-voltage rectifier is arranged, and an impulse capacitor that has charged passes through an auxiliary ball crack to basic ball crack multiple discharge.Utilize electric fluid power effect, separate and reunite and dispersion.This method equipment therefor is simpler, and electric energy is directly changed into mechanical energy, and is time-consuming also short.
Description
The present invention relates to a kind of ultra-micro powder and separate the method for reuniting, in fine ceramics or electronic ceramics development, be used for the preparation of various metal oxide ultra-micro powders (tens to the hundreds of nanometer) with dispersion.
In the preparation of high performance ceramic material, crucial is the preparation of ultra-micro powder, requires to obtain powder ultra-fine, ultrapure and that reactivity is high.And ultra-micro powder is owing to thermodynamic (al) reason, and self always reunites together.Preparation ultra-micro powders such as new synthesis technique such as chemical coprecipitation, hydro-thermal method and sol-gel process have been adopted now; Other method is to separate with ball-milling method, ultrasonic vibration method to reunite and dispersion.That yet above these methods all exist is time-consuming, poor efficiency or introduce deficiency such as impurity.Separate the method for reuniting and disperseing about the reunion powder electricity consumption fluid power that will be scattered in the liquid, not seeing so far has bibliographical information.
The objective of the invention is to answer electricity consumption fluid power effect, the reunion powder that will be scattered in the liquid is separated reunion and is scatter, and becomes homodisperse ultra-micro powder (tens to the hundreds of nanometer) system.
Basic principle of the present invention is: the iknsulating liquid envelope that will be dispersed with reunion powder is contained in the sample chamber of an insulation.In this sample chamber, be provided with basic discharge and use the ball crack.An impulse capacitor that has charged, is separated the powder of reuniting reunion and is disperseed in order to produce strong pressure wave by the basic discharge ball-gap discharge of an auxiliary ball crack in being arranged on sample chamber, also promptly fully answers electricity consumption fluid power effect.In order to increase the action time of electric fluid power, also promptly increase above discharge time, use a high-voltage rectifier, constantly replenish the electric energy that impulse capacitor is emitted, so can discharge again and again in basic ball crack.
Fig. 1 is the circuit diagram of the electric aspect of the present invention.
Fig. 2 is a sample chamber and the structure chart in basic ball crack wherein.
Fig. 3 a is aggregate schematic diagram before electric fluid power effect.
Fig. 3 b is aggregate schematic diagram after electric fluid power effect.
Fig. 4 a is the distribution map of certain aggregate different-grain diameter particle before electric fluid power effect.
Fig. 4 b is the distribution map of certain aggregate different-grain diameter particle after electric fluid power effect.
With reference to Fig. 1, iknsulating liquid (9) envelope that is dispersed with reunion powder is contained in the sample chamber (8) of an insulation, a basic ball crack (7) is set in the sample chamber (8).The impulse capacitor that has charged (5) is arranged on airborne auxiliary ball crack (6) by one and carries out impulse discharge to basic ball crack (7).The secondary of a step-up transformer (2) charged to impulse capacitor (5) through silicon stack (silicon rectifier stack) (3), resistance (4).After being charged to certain high voltage on the impulse capacitor (5), at first auxiliary ball crack (6) punctures, so the electric energy of storing in the impulse capacitor (5) is delivered in the basic ball crack (7) immediately discharge in basic ball crack (7), produce strong pressure wave, reunion powder is separated reunited and dispersion.
Owing to be provided with auxiliary ball crack (6), the disruptive discharge in auxiliary ball crack (6), make the wavefront steepening that adds to the potential pulse in basic ball crack (7), and shorten the duration that adds to the pulse in basic ball crack (7) greatly, prevent the generation of oscillatory process, also can eliminate the possibility that in basic ball crack (7), is converted into arc discharge.
Pressure regulator among Fig. 1 (1) is for boosting and adjusting impulse capacitor (5) and go up ceiling voltage usefulness.The actual line of the discharge loop of impulse capacitor among Fig. 1 (5) should slightly be lacked, and prevents that corona from taking place and reduction lead-in inductance amount.Auxiliary ball crack (6) is installed on the insulating support, and insulation against ground is good.The ground connection of above electric device also should be good, and earth resistance should be less than 5 Ω.
The circle cup that sample chamber among Fig. 2 (8) makes for lucite, 40 millimeters of internal diameters, 10 millimeters of wall thickness are high 80 millimeters.Lid (8) is arranged on the sample chamber (8).The iknsulating liquid (9) that is dispersed with reunion powder is contained in sample chamber (8), accounted for wherein 80% volume, and screw on lid (8) at last.The sphere diameter in brazen basic ball crack (7) is 7 millimeters, and the ball crack is between 2 to 4 millimeters.Sphere diameter and ball crack as basic ball crack (7) are too small, in the discharge process with the cavitation pitting phenomenon of generating electrodes, make disperse at last powder in be mixed with the particle of the oxide of the metal of a large amount of electrodes and electrode metal.When the ball crack in basic ball crack (7) when increasing to 4 millimeters for 2 millimeters because the increase of pressure wave sphere of action in the discharge, the action effect that electric fluid power is separated reunion also can obtain increasing.
The used sphere diameter in the auxiliary ball crack (6) that cooperates with above basic ball crack (7) must be more than or equal to 15 millimeters, and the ball crack is between 6 to 20 millimeters.Sphere diameter as auxiliary ball crack (6) is too little, and the discharge in auxiliary ball crack (6) becomes the corona discharge of continous way, so that ball crack (7) can not get the single high-voltage pulse substantially, does not produce electric fluid power effect.Fixed when basic ball crack (7), the sphere diameter in auxiliary ball crack (6) is a timing also, adjusts the ball crack in auxiliary ball crack (6), the similar while disruptive discharge in feasible auxiliary ball crack (6) and basic ball crack (7).If the ball crack in auxiliary ball crack (6) continues to increase on this basis, the ceiling voltage on the impulse capacitor (5) also increases thereupon, and the effect of respective electrical fluid power also increases.
Under the general condition, the about per second of pulsed discharge once, each discharge pulse duration is between 2 to 3 microseconds.Under certain discharge frequency, discharge total number of times the more, electric fluid power is also long total action time, and the effect of separating reunion also heals well.
When the capacitance of impulse capacitor (5) increases, energy storage is increased, strengthen electric fluid power intensity, but can not be excessive, under above various conditions as when increasing to 0.06 microfarad, sample chamber (8) can be crashed to pieces.
Fig. 3 a and Fig. 3 b are respectively the schematic diagram of certain aggregate of electric fluid power effect front and back.
Electricity fluid power not only plays to separate reunites and the effect that disperses, and can make the size distribution narrow of the powder of last acquisition.Fig. 4 a and Fig. 4 b are respectively before the electric fluid power effect and the distribution map of the particle of back different-grain diameter D.F(% among the figure) is the shared percentage of particle of particle diameter D when calculating by weight average.
Advantage of the present invention is: whole equipment therefor is simpler; Electric energy is directly changed into mechanical energy; Just can obtain the ultra micro powder of size distribution narrow in the short period (several minutes).
Disperse the iknsulating liquid of reunion powder can be with deionized water or running water.The resistance of resistance (4) is 100 to 1000 megaohms, should be taken into account that ceiling voltage can reach 15 to 30 kilovolts on it.Impulse capacitor (5) is with 0.02 to 0.05 microfarad.Auxiliary ball crack (6) sphere diameter is more than or equal to 15 millimeters, and its ball crack is between 6 to 20 millimeters.The sphere diameter in basic ball crack (7) is 7 millimeters, and its ball crack is between 2 to 4 millimeters.Impulse capacitor (5) is gone up 15 to 30 kilovolts of ceiling voltages.
Claims (2)
1, a kind of ultra-micro powder that belongs to the fine ceramics field is separated and is reunited and the method for disperseing, and it is characterized in that:
(1) iknsulating liquid [9] envelope that will be dispersed with reunion powder is contained in sample chamber [8], is provided with basic ball crack [7] in the sample chamber [8];
(2) step-up transformer [2] passes through silicon stack [3], resistance [4] to the repeatedly unidirectional charging of impulse capacitor [5];
(3) impulse capacitor [5] is by assisting repeatedly unidirected discharge of ball crack [6] and basic ball crack [7].
2, separate the method for reuniting with dispersion by the described a kind of ultra-micro powder that belongs to the fine ceramics field of claim 1, it is characterized in that: resistance (4) resistance is 100 to 1000 megaohms; The capacitance of impulse capacitor (5) is 0.02 to 0.05 microfarad; Impulse capacitor (5) is gone up 15 to 30 kilovolts of ceiling voltages; The sphere diameter in auxiliary ball crack (6) is more than or equal to 15 millimeters, and the ball crack is 6 to 20 millimeters therebetween; 7 millimeters of the sphere diameters in basic ball crack (7), the ball crack is 2 to 4 millimeters therebetween; 40 millimeters of sample chamber (8) internal diameters, 10 millimeters of wall thickness, high 80 millimeters, (8 ') with cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90108242 CN1023686C (en) | 1990-10-03 | 1990-10-03 | Deaggregating and dispersing method for superfine powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90108242 CN1023686C (en) | 1990-10-03 | 1990-10-03 | Deaggregating and dispersing method for superfine powder |
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| Publication Number | Publication Date |
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| CN1060418A true CN1060418A (en) | 1992-04-22 |
| CN1023686C CN1023686C (en) | 1994-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 90108242 Expired - Fee Related CN1023686C (en) | 1990-10-03 | 1990-10-03 | Deaggregating and dispersing method for superfine powder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354231C (en) * | 2003-12-29 | 2007-12-12 | 三星电机株式会社 | Method of deagglomerating ceramic powder, deagglomeration mill used therefor and method of preparing highly dispersed slurry using the deagglomerated powder |
| CN111303840A (en) * | 2020-03-27 | 2020-06-19 | 青海大学 | Preparation method of inorganic hydrous salt phase-change material |
| CN111408606A (en) * | 2020-03-27 | 2020-07-14 | 青海大学 | Method for dispersing and activating micro silicon powder |
| CN113260697A (en) * | 2018-12-20 | 2021-08-13 | 国立大学法人丰桥技术科学大学 | Electroporation device and method for producing foreign substance-introduced cell |
-
1990
- 1990-10-03 CN CN 90108242 patent/CN1023686C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354231C (en) * | 2003-12-29 | 2007-12-12 | 三星电机株式会社 | Method of deagglomerating ceramic powder, deagglomeration mill used therefor and method of preparing highly dispersed slurry using the deagglomerated powder |
| CN113260697A (en) * | 2018-12-20 | 2021-08-13 | 国立大学法人丰桥技术科学大学 | Electroporation device and method for producing foreign substance-introduced cell |
| CN111303840A (en) * | 2020-03-27 | 2020-06-19 | 青海大学 | Preparation method of inorganic hydrous salt phase-change material |
| CN111408606A (en) * | 2020-03-27 | 2020-07-14 | 青海大学 | Method for dispersing and activating micro silicon powder |
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| Publication number | Publication date |
|---|---|
| CN1023686C (en) | 1994-02-09 |
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