CN104319053A - Device and method for preparing iron nitride magnetic liquid by barometric-pressure dielectric barrier discharge - Google Patents
Device and method for preparing iron nitride magnetic liquid by barometric-pressure dielectric barrier discharge Download PDFInfo
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- CN104319053A CN104319053A CN201410525493.0A CN201410525493A CN104319053A CN 104319053 A CN104319053 A CN 104319053A CN 201410525493 A CN201410525493 A CN 201410525493A CN 104319053 A CN104319053 A CN 104319053A
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Abstract
The invention discloses a device and a method for preparing iron nitride magnetic liquid by barometric-pressure dielectric barrier discharge and belongs to the technical field of chemical equipment. According to the device for preparing the iron nitride magnetic liquid by the barometric-pressure dielectric barrier discharge, a pipeline III is communicated with one end of a mass flow controller I; the other end of the mass flow controller I is communicated with one end of a check valve I; a pipeline IV is communicated with one end of a mass flow controller II; the other end of the mass flow controller II is communicated with one end of a check valve II; a pipeline V is communicated with one end of a mass flow controller III; the other end of the mass flow controller III is communicated with one end of a check valve III; the other end of the check valve I is communicated with a pipeline I; the other end of the check valve II is communicated with the pipeline I; the tail end of the pipeline I enters a constant-temperature bath and the other end of the check valve III is communicated with a pipeline II; the tail end of the pipeline II is arranged in the constant-temperature bath; the constant-temperature bath is provided with a temperature controller and temperature of the constant-temperature bath is adjusted.
Description
technical field
The present invention relates to the apparatus and method that atmospheric dielectric barrier discharge prepares magnetic liquid of nitriding iron, belong to technical field of chemical.
Background technology
Magnetic liquid is a kind of soft magnetism Intelligent liquid composite material of superparamagnetic, by magnetic-particle, surfactant and carrier fluid three part form.Magnetic-particle is mainly divided into three major types: metal system, iron oxide, iron nitride-based.Metal system magnetic-particle mainly contains Fe, Co, Ni and alloy thereof, and it is very easily oxidized, poor chemical stability, limits the development of metal system magnetic liquid.Iron oxide magnetic-particle mainly Fe
3o
4, but its saturation magnetization is lower, can not prepare the magnetic liquid of high saturation and magnetic intensity.Iron nitride-based magnetic-particle is ε-Fe mainly
3n, its saturation magnetization is higher, is the ideal material preparing high saturation and magnetic intensity magnetic liquid.
At present, the technology of preparing of magnetic liquid of nitriding iron mainly contains gas-liquid phase method and plasma CVD method.The people such as the Xu Jiaoren of Iron and Steel Research Geueral Inst (application number: 98101595.6, the manufacture method of iron nitride magnetic fluid) adopt gas-liquid phase legal system for magnetic liquid of nitriding iron, article " development of the high saturation and magnetic intensity magnetic liquid of nitriding iron " display that its calendar year 2001 delivers at " Metallic Functional Materials " periodical, preparation time reaches 30 hours, and need to improve the saturation magnetization of magnetic liquid of nitriding iron, through loaded down with trivial details techniques such as precipitation process, Separation of Solid and Liquid, ultrasonic wave dispersions by adding coagulation method in precipitation reagent or stove.The people such as Huang Wei (application number: 200510064275.2, concentrating agent of low volatilization point is utilized to prepare the method for magnetic liquid of nitriding iron) also adopt above-mentioned gas-liquid phase subtraction unit to prepare magnetic liquid of nitriding iron, preparation time does not still shorten, but concentrating agent of low volatilization point adds in the mixed liquor of carrier fluid and surfactant by this invention, improve the saturation magnetization of magnetic liquid of nitriding iron.The people such as Li Xuehui (application number: 200310105229.3, the method of preparing nitrided iron magnetic liquid by plasma and device) using plasma method prepared magnetic liquid of nitriding iron, about 2 hours will be shortened to the reaction time, but the method has synthesized magnetic liquid of nitriding iron in gas-liquid two-phase body discharge plasma, course of reaction is very complicated, gas-liquid two-phase body discharge mechanism and magnetic liquid of nitriding iron synthesis mechanism are studied, inhibits further developing of magnetic liquid of nitriding iron preparation method.
Summary of the invention
In order to overcome above-mentioned deficiency, the invention provides the apparatus and method that atmospheric dielectric barrier discharge prepares magnetic liquid of nitriding iron.
The technical scheme that the present invention takes is as follows:
Atmospheric pressure matter barrier discharge prepares the device of magnetic liquid of nitriding iron, one end of pipeline tee joint mass flow controller one, the other end of mass flow controller one is communicated with one end of break valve one, pipeline four is communicated with one end of mass flow controller two, and the other end of mass flow controller two is communicated with one end of break valve two, pipeline five is communicated with one end of mass flow controller three, and the other end of mass flow controller three is communicated with one end of break valve three, the other end of break valve one is communicated with pipeline one, and the other end of break valve two is communicated with pipeline one, the end of pipeline one enters in constant temperature bath, the other end connecting pipeline two of break valve three, and the end of pipeline two is in constant temperature bath, constant temperature bath has temperature controller, regulating thermostatic bath temperature, pipeline one is communicated with one end of break valve four, and the other end of break valve four is communicated with the air inlet of discharge cavity bottom, the outer wall of dielectric barrier has grounding electrode, the inside of dielectric barrier has high-field electrode, high frequency and high voltage power supply is connected with between the upper end of high-field electrode and grounding electrode, it is discharge air-gap between high-field electrode and the inwall of dielectric barrier, microwell plate is installed in the upper end of dielectric barrier, the top of microwell plate is reaction chamber, between reaction chamber and discharge cavity, there is microwell plate, a part for the bottom of inlet is in reaction chamber, the upper end of inlet has unidirectional valve, the top of unidirectional valve is communicated with flowmeter, the top of flowmeter is communicated with apotheca, the lower exhaust port of cooling device is in reaction chamber, the outside wall surface of the bottom of reaction chamber has muff.
Atmospheric dielectric barrier discharge prepares the method for magnetic liquid of nitriding iron, comprises the steps:
The first step, the preparatory stage: prepare surfactant and carrier fluid mixed liquor in mass ratio, ultrasonic process 15 minutes, injects apotheca, regulates the air in dilution Ar flow displacement reaction chamber;
Second step, the stage of reaction: liquid iron pentacarbonyl is heated to 30 DEG C, regulates and carries Ar flow, carried by iron pentacarbonyl steam and enter discharge cavity, applies voltage, generates atmospheric pressure Ar/NH
3/ Fe (CO)
5coaxial unit plasma, in plasma, the active group reaction of Fe and N generates ε-Fe
3n magnetic-particle, by the ε-Fe that surfactant is coated
3n magnetic-particle is dispersed in carrier fluid, forms magnetic liquid of nitriding iron;
3rd step, cooling stage: after preparation experiment terminates, for avoiding hotter magnetic liquid oxidized in atmosphere, continuing logical dilution Ar and protecting magnetic liquid, when reacting cavity temperature and reducing to room temperature, opening reaction chamber and collect magnetic liquid of nitriding iron.
Beneficial effect of the present invention: propose the apparatus and method utilizing atmospheric dielectric barrier discharge to prepare magnetic liquid of nitriding iron, the manufacturing cycle of magnetic liquid of nitriding iron was shortened to about 2 hours from 30 hours by the method, prepared magnetic liquid good fluidity, saturation magnetization can reach 56.17 mT.The method has saved cost greatly, is a kind of magnetic liquid of nitriding iron technology of preparing with industrial applications prospect.
Accompanying drawing explanation
Fig. 1 is apparatus structure sketch of the present invention.
Fig. 2 is ε-Fe
3the X-ray diffractogram of N magnetic-particle.
Fig. 3 is ε-Fe
3the transmission electron microscope photo of N magnetic-particle.
Fig. 4 is ε-Fe
3n magnetic particle diameter column distribution map.
The magnetic hysteresis loop of Fig. 5 magnetic liquid of nitriding iron.
In figure: 1. liquid iron pentacarbonyl, 2. constant temperature bath, 3. temperature controller, 41. mass flow controllers one, 42. mass flow controllers two, 43. mass flow controllers three, 51. break valves one, 52. break valves two, 53. break valves three, 6. muff, 7. high frequency and high voltage power supply, 8. unidirectional valve, 9. flowmeter, 10. apotheca, 11. cooling devices, 12. exhaust outlets, 13. inlets, 14. reaction chambers, 15. carrier fluids and surfactant mixed liquor, 16. microwell plates, 17. discharge cavities, 18. high-field electrodes, 19. grounding electrodes, 20. plasmas, 21. discharge air-gaps, 22. dielectric barriers, 23. air inlets, 24. break valves four, 25. pipelines one, 26. pipelines two, 27. pipelines three, 28. pipelines four, 29. pipelines five.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described:
As shown in Figure 1: atmospheric pressure matter barrier discharge prepares the device of magnetic liquid of nitriding iron, pipeline 3 27 is communicated with one end of mass flow controller 1, the other end of mass flow controller 1 is communicated with one end of break valve 1, pipeline 4 28 is communicated with one end of mass flow controller 2 42, and the other end of mass flow controller 2 42 is communicated with one end of break valve 2 52, pipeline 5 29 is communicated with one end of mass flow controller 3 43, and the other end of mass flow controller 3 43 is communicated with one end of break valve 3 53, the other end of break valve 1 is communicated with pipeline 1, and the other end of break valve 2 52 is communicated with pipeline 1, the end of pipeline 1 enters in constant temperature bath 2, the other end connecting pipeline 2 26 of break valve 3 53, and the end of pipeline 2 26 is in constant temperature bath 2, constant temperature bath 2 has temperature controller 3, regulating thermostatic bath temperature, pipeline 1 is communicated with one end of break valve 4 24, and the other end of break valve 4 24 is communicated with the air inlet 23 of discharge cavity 17 bottom, the outer wall of dielectric barrier 22 has grounding electrode 19, the inside of dielectric barrier 22 has high-field electrode 18, high frequency and high voltage power supply 7 is connected with between the upper end of high-field electrode 18 and grounding electrode 19, it is discharge air-gap 21 between the inwall of high-field electrode 18 and dielectric barrier 22, microwell plate 16 is installed in the upper end of dielectric barrier 22, the top of microwell plate 16 is reaction chambers 14, there is between reaction chamber 14 and discharge cavity 17 microwell plate 16, a part for the bottom of inlet 13 is in reaction chamber 14, the upper end of inlet 13 has unidirectional valve 8, the top of unidirectional valve 8 is communicated with flowmeter 9, the top of flowmeter 9 is communicated with apotheca 10, the lower exhaust port 12 of cooling device 11 is in reaction chamber 14, the outside wall surface of the bottom of reaction chamber 14 has muff 6.
Atmospheric dielectric barrier discharge prepares the method for magnetic liquid of nitriding iron, comprises the steps:
The first step, the preparatory stage: prepare surfactant and carrier fluid mixed liquor in mass ratio, ultrasonic process 15 minutes, injects apotheca 10, regulates the air in dilution Ar flow displacement reaction chamber;
Second step, the stage of reaction: liquid iron pentacarbonyl is heated to 30 DEG C, regulates and carries Ar flow, carried by iron pentacarbonyl steam and enter discharge cavity 17, applies voltage, generates atmospheric pressure Ar/NH
3/ Fe (CO)
5coaxial unit plasma 20, in plasma, the active group reaction of Fe and N generates ε-Fe
3n magnetic-particle, by the ε-Fe that surfactant is coated
3n magnetic-particle is dispersed in carrier fluid, forms magnetic liquid of nitriding iron;
3rd step, cooling stage: after preparation experiment terminates, for avoiding hotter magnetic liquid oxidized in atmosphere, continuing logical dilution Ar and protecting magnetic liquid, when temperature reduces to room temperature in reaction chamber 14, opening reaction chamber 14 and collect magnetic liquid of nitriding iron.
Atmospheric pressure matter barrier discharge as shown in Figure 1 prepares the device of magnetic liquid of nitriding iron, primarily of air distribution system, atmospheric pressure coaxial unit plasma reactor, magnetic liquid of nitriding iron preparation system three part composition.Air distribution system is by three tunnel gas compositions, and pipeline 3 27 leads to ammonia (NH
3), the logical argon gas (Ar) of pipeline 4 28, the logical argon gas (Ar) of pipeline 5 29, with Portable belt iron pentacarbonyl (Fe (CO)
5) enter discharge cavity; Ammonia (NH
3) as reacting gas, a road argon gas (Ar) is as NH
3diluent gas; Another road Ar passes into iron pentacarbonyl (Fe (CO)
5) in, carry iron pentacarbonyl steam and enter discharge cavity.Liquid iron pentacarbonyl 1 is placed in constant temperature bath 2, and utilizing temperature controller 3 to regulate and control heating-up temperature is 30 DEG C, to be carried by iron pentacarbonyl steam enter discharge cavity 17 from bottom to top with Ar in the mode of bubbling.Magnetic liquid of nitriding iron preparation system, primarily of muff 6, apotheca 10, cooling device 11 and reaction chamber 14 4 part composition, installs microwell plate 16 at reaction chamber 14 and discharge cavity 17 junction.For avoiding carrier fluid and surfactant mixed liquor 15 to discharge with tail gas, at exhaust outlet 12, place is furnished with cooling device 11.Atmospheric pressure coaxial unit plasma reactor adopts coaxial circles tubular electrode structure, and quartz glass tube, as dielectric barrier 22, manages outer uniform winding copper wire as grounding electrode 19.High-field electrode 18 is the stainless steel of diameter 1.5mm; Grounding electrode 19 adopts the copper wire uniform winding of diameter 1.0mm at quartz glass tube outer surface, and discharge air-gap is 2.75mm, and actual discharge length is 50mm; Quartz glass tube as dielectric barrier 22, its internal diameter 7.0mm, external diameter 10.0mm, thickness 1.5mm.Iron pentacarbonyl steam, NH
3enter discharge cavity 17 from bottom to top with the mist of Ar, under the effect of high frequency and high voltage power supply 7, produce electric discharge, form atmospheric pressure coaxial unit plasma 21, in plasma, the active group reaction of Fe and N generates ε-Fe
3n magnetic-particle, after coated by surfactant, forms magnetic liquid of nitriding iron.1 the preparation method that atmospheric pressure coaxial unit provided by the invention prepares magnetic liquid of nitriding iron is described as follows by reference to the accompanying drawings:
The first step, the preparatory stage: 2:11 prepares surfactant (PBSI-941) and carrier fluid (7# white oil) mixed liquor in mass ratio, ultrasonic process 15 minutes, injects apotheca 10.Good seal experimental provision is installed, opens mass flow controller 4, regulate dilution Ar flow to be 900 ml/min, the air in displacement reaction chamber.Open unidirectional valve 8 and preset mixed liquor is injected into reaction chamber 14, because microwell plate 16 acts on and larger Ar flow, mixed liquor rests on reaction chamber all the time, does not enter discharge cavity 17.
Second step, the stage of reaction: liquid iron pentacarbonyl 1 is heated to 30 DEG C, regulates and carries Ar flow, make Fe (CO)
5dividing potential drop is 5.17 × 10
2pa, by Fe (CO)
5steam carries and enters discharge cavity 17, applies voltage, generates atmospheric pressure Ar/NH
3/ Fe (CO)
5coaxial unit plasma.Regulate NH
3flow is 30 ml/min, makes the active group of Fe and N keep a desired value, generates the ε-Fe of single thing phase
3n magnetic-particle, the ε-Fe of generation
3n magnetic-particle enters into the mixed liquor of surfactant and carrier fluid from bottom to top by microwell plate 16 with air-flow, due to microwell plate and the stirring action compared with air flow, by the ε-Fe that surfactant is coated
3n magnetic-particle is dispersed in carrier fluid.Meanwhile, regulate temperature controller 3, make reaction temperature remain on 180 DEG C, this reaction temperature contributes to the better coated magnetic particle of surfactant, also can not have a negative impact to the mixed liquor of carrier fluid and surfactant, generates the magnetic liquid of nitriding iron that stability is higher.For avoiding mixed liquor to discharge with tail gas, cooling circulating water continuous service in experimentation.When observing the mixed liquor in reaction chamber and becoming the black liquor of thickness, stop reaction, experimentation runs 2 hours.
3rd step, cooling stage: after preparation experiment terminates, for avoiding hotter magnetic liquid oxidized in atmosphere, continuing logical dilution Ar and protecting magnetic liquid, when temperature reduces to room temperature in reaction chamber 14, opening reaction chamber 14 and collect magnetic liquid.
In illustrating accompanying drawing below, other accompanying drawing makes an explanation.
ε-Fe in the magnetic liquid of nitriding iron of Fig. 2 prepared by the present invention
3the X ray diffracting spectrum of N magnetic-particle, three strong diffraction maximums appear in (111), (113), (211) peak position, other several more weak diffraction maximums appear in (002), (112), (201), (202), (222) peak position, substantially identical with the standard card (ICDD/JCPDS PDF 49-1663) of Jade6.0, judge that the main component of magnetic-particle is as ε-Fe
3n, prepared by be magnetic liquid of nitriding iron.
ε-Fe in the magnetic liquid of nitriding iron of Fig. 3 prepared by the present invention
3the transmission electron microscope photo of N magnetic-particle, in photo, the director circle ball of black is magnetic-particle, and the gray layer of director circle outer surface of ball is coated monolayer surfactant, prevents the oxidized or clusters of magnetic-particle.Magnetic particle diameter is about 10 ~ 15 nm, be less than single-domain critical size, magnetic-particle is single domain structure, magnetic-particle can be considered magnetic dipole, and the magnetic moment direction of magnetic dipole is in the direction of easy axis determined by magnetocrystalline anisotropy, and the direction of easy axis of each magnetic dipole is different, magnetic moment direction is also different, during without externally-applied magnetic field effect, the magnetic moment direction of each magnetic dipole is disorderly and unsystematic, cancel each other, and magnetic liquid does not show macroscopic magnetization.ε-Fe in the magnetic liquid of nitriding iron of Fig. 4 prepared by the present invention
3n magnetic particle diameter column distribution map, use Origin software to carry out Gauss matching, the average diameter that can obtain magnetic-particle is 11 nm.
The magnetic hysteresis loop of the magnetic liquid of nitriding iron of Fig. 5 prepared by the present invention, magnetic hysteresis loop is " S " type curve substantially, and remanent magnetism and coercive force are all very little, and the magnetic liquid of nitriding iron prepared by explanation is superparamagnetism.
By the method described in specific embodiment, the raw material of prepared magnetic liquid of nitriding iron, technological parameter and performance are as shown in Table 1 and Table 2.
Table 1 magnetic liquid of nitriding iron raw materials and technological parameter
The performance index of table 2 magnetic liquid of nitriding iron
。
The magnetic liquid of nitriding iron utilizing the present invention to prepare compared with prior art, shortens preparation time greatly, and the saturation magnetization of magnetic liquid of nitriding iron is also higher.The density of the magnetic liquid of nitriding iron (sample number into spectrum in patent of invention is the magnetic liquid of 4) that the people such as Li Xuehui (application number: 200310105229.3, the method for preparing nitrided iron magnetic liquid by plasma and device) use plasma method to prepare is
kg/m
3time, its saturation magnetization is only 72.4 mT.The magnetic liquid of nitriding iron that the present invention uses atmospheric pressure coaxial unit one step to prepare, density is only
kg/m
3time, its saturation magnetization has reached 56.17 mT, illustrates that the magnetic liquid of nitriding iron magnetic-particle performance of use prepared by the present invention is fine.The density of magnetic liquid determines, although the magnetic liquid of nitriding iron density prepared by the people such as Li Xuehui reaches primarily of the magnetic-particle quantity incorporated in carrier fluid
kg/m
3, but saturation magnetization is lower, the magnetic-particle poor-performing prepared by explanation.The people such as Huang Wei (application number: 200510064275.2, utilize concentrating agent of low volatilization point to prepare the method for magnetic liquid of nitriding iron) use the standby magnetic liquid of nitriding iron of gas-liquid phase legal system (lot number 9 magnetic liquid in patent of invention) to use concentrating agents after, the density of magnetic liquid of nitriding iron is
kg/m
3time, its saturation magnetization reaches 142.5 mT, but the method reaction time reaches 30 hours, and cost is higher, is unsuitable for developing industryization and produces.Concentrate after removal unit divides carrier fluid to the magnetic liquid of nitriding iron prepared by the present invention, the density of magnetic liquid reaches
kg/m
3time, its saturation magnetization has brought up to 139.4 mT, and its saturation magnetization reaches domestic level, and mobility is better.
Claims (2)
1. atmospheric pressure matter barrier discharge prepares the device of magnetic liquid of nitriding iron, it is characterized in that: pipeline three (27) is communicated with one end of mass flow controller one (41), the other end of mass flow controller one (41) is communicated with one end of break valve one (51), pipeline four (28) is communicated with one end of mass flow controller two (42), and the other end of mass flow controller two (42) is communicated with one end of break valve two (52), pipeline five (29) is communicated with one end of mass flow controller three (43), and the other end of mass flow controller three (43) is communicated with one end of break valve three (53), the other end of break valve one (51) is communicated with pipeline one (25), and the other end of break valve two (52) is communicated with pipeline one (25), the end of pipeline one (25) enters in constant temperature bath (2), the other end connecting pipeline two (26) of break valve three (53), and the end of pipeline two (26) is in constant temperature bath (2), constant temperature bath (2) has temperature controller (3), regulating thermostatic bath temperature, the upper one end being communicated with break valve four (24) of pipeline one (25), and the other end of break valve four (24) is communicated with the air inlet (23) of discharge cavity (17) bottom, the outer wall of dielectric barrier (22) has grounding electrode (19), the inside of dielectric barrier (22) has high-field electrode (18), high frequency and high voltage power supply (7) is connected with between the upper end of high-field electrode (18) and grounding electrode (19), discharge air-gap (21) between the inwall of high-field electrode (18) and dielectric barrier (22), microwell plate (16) is installed in the upper end of dielectric barrier (22), the top of microwell plate (16) is reaction chamber (14), there is between reaction chamber (14) and discharge cavity (17) microwell plate (16), a part for the bottom of inlet (13) is in reaction chamber (14), the upper end of inlet (13) has unidirectional valve (8), the top of unidirectional valve (8) is communicated with flowmeter (9), the top of flowmeter (9) is communicated with apotheca (10), the lower exhaust port (12) of cooling device (11) is in reaction chamber (14), the outside wall surface of the bottom of reaction chamber (14) has muff (6).
2. atmospheric dielectric barrier discharge prepares the method for magnetic liquid of nitriding iron, it is characterized in that: comprise the steps:
The first step, the preparatory stage: prepare surfactant and carrier fluid mixed liquor in mass ratio, ultrasonic process 15 minutes, injects apotheca (10), regulates the air in dilution Ar flow displacement reaction chamber;
Second step, the stage of reaction: liquid iron pentacarbonyl is heated to 30 DEG C, regulates and carries Ar flow, carried by iron pentacarbonyl steam and enter discharge cavity (17), applies voltage, generates atmospheric pressure Ar/NH
3/ Fe (CO)
5coaxial unit plasma (20), in plasma, the active group reaction of Fe and N generates ε-Fe
3n magnetic-particle, by the ε-Fe that surfactant is coated
3n magnetic-particle is dispersed in carrier fluid, forms magnetic liquid of nitriding iron;
3rd step, cooling stage: after preparation experiment terminates, for avoiding hotter magnetic liquid oxidized in atmosphere, continuing logical dilution Ar and protecting magnetic liquid, when temperature reduces to room temperature in reaction chamber (14), opening reaction chamber (14) and collect magnetic liquid of nitriding iron.
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|---|---|---|---|
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|---|---|---|---|
| CN201410525493.0A CN104319053B (en) | 2014-10-09 | 2014-10-09 | Device and method for preparing iron nitride magnetic liquid by barometric-pressure dielectric barrier discharge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110572923A (en) * | 2019-07-19 | 2019-12-13 | 中国石油大学(华东) | Recyclable coaxial DBD plasma reactor for liquid modification |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05286704A (en) * | 1992-04-10 | 1993-11-02 | Natl Res Inst For Metals | Device for producing magnetic fluid or grain |
| CN201389453Y (en) * | 2009-04-08 | 2010-01-27 | 大连大学 | Apparatus for synthesizing nano magnetic lubricant by adopting cooperation of alternating electric field and temperature field |
| CN102063992A (en) * | 2010-11-27 | 2011-05-18 | 大连大学 | Magnetic liquid and preparation method thereof |
-
2014
- 2014-10-09 CN CN201410525493.0A patent/CN104319053B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05286704A (en) * | 1992-04-10 | 1993-11-02 | Natl Res Inst For Metals | Device for producing magnetic fluid or grain |
| CN201389453Y (en) * | 2009-04-08 | 2010-01-27 | 大连大学 | Apparatus for synthesizing nano magnetic lubricant by adopting cooperation of alternating electric field and temperature field |
| CN102063992A (en) * | 2010-11-27 | 2011-05-18 | 大连大学 | Magnetic liquid and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110572923A (en) * | 2019-07-19 | 2019-12-13 | 中国石油大学(华东) | Recyclable coaxial DBD plasma reactor for liquid modification |
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