CN105097177A - Multiferroic liquid and preparation method thereof - Google Patents
Multiferroic liquid and preparation method thereof Download PDFInfo
- Publication number
- CN105097177A CN105097177A CN201510426566.5A CN201510426566A CN105097177A CN 105097177 A CN105097177 A CN 105097177A CN 201510426566 A CN201510426566 A CN 201510426566A CN 105097177 A CN105097177 A CN 105097177A
- Authority
- CN
- China
- Prior art keywords
- multiferroic
- liquid
- nano particle
- magnetic
- multiferroic liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Soft Magnetic Materials (AREA)
- Colloid Chemistry (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
The invention discloses a multiferroic liquid and a preparation method thereof, and aims at solving the defects that a solid multiferroic material is large in coercive force; the structure cannot be changed once the solid multiferroic material is formed; the magnetoelectric coupling effect is weak; and the solid multiferroic material is easily broken down by voltage. The multiferroic liquid is a stable suspension liquid which is formed by evenly dispersing nano particles with an electric-magnetic core-shell structure, which are formed by wrapping the outer surface of an internal ferroelectric material with a magnetic material, into a mixed liquid of a base liquid and a surfactant. The multiferroic liquid disclosed by the invention not only has ferroelectricity and magnetism, but also has liquidity and relatively small coercive force; and the lengths and the thicknesses of nanochains formed by the nano particles in the multiferroic liquid can be adjusted by applying different electric fields or magnetic fields to the multiferroic liquid according to the requirements, so that the characteristics of the multiferroic liquid in electricity, magnetics, fluid mechanics, optics and acoustics are adjusted. The invention provides the concept of the multiferroic liquid for the first time, and provides a preparation method. A new research direction is opened up for research of multiferroic materials.
Description
Technical field
The invention belongs to multi-ferroic material field, be specifically related to a kind of multiferroic liquid and preparation method thereof.
Background technology
The Schmid of Switzerland in 1994 clearly proposes this concept of multi-ferroic material, multi-ferroic material (mutliferroic) refer to material same mutually in comprise the key property of two kinds and two or more iron, the key property of these iron comprises ferroelectricity (anti-ferroelectricity), ferromagnetism (antiferromagnetism, ferrimagnetism) and ferroelasticity.There is spontaneous polarization sequence and spin sequence at a certain temperature in this kind of material simultaneously, the magnetoelectric effect caused is there is just while them, multiferroic is made to have some special physical property, cause some newly, significant physical phenomenons, as: produce electric polarization or induction ferroelectric phase transition under the influence of a magnetic field; Magnetic field or induction ferromagnetic phase transition is produced under electric field action; Near Curie temperature ferromagnetic phase transition point, produce the sudden change of dielectric constant, multi-ferroic material has become the current focus studied in the world.
The same with ferromagnetic material, ferroelectric material also may be used for information and stores.Because ferroelectric material has excellent ferroelectric, the characteristic such as dielectric, pyroelectric, electro-optical characteristic, acousto-optic performance, nonlinear optics, they have very important application in the solid state device such as ferroelectric memory, Infrared Detectors, transducer, surface acoustic wave, integrated optoelectronic device, capacitor, and this has also greatly promoted the research and development of ferroelectric material and feroelectronics.Ferroelectric Random Access Memory based on ferroelectric material has huge application prospect due to features such as its non-volatile and reading speed are fast.Ferroelectric material and application study thereof have become one of Condensed Matter Physics, research topic that solid electronics field is the most popular.
There is at present ferroelectric order and the orderly material of magnetic is also few simultaneously, typically have bismuth ferrite (BiFeO
3, be called for short BFO), mangaic acid bismuth (BiMnO
3, be called for short BMO), sieve breath salt (NaKC
4h
4o
6.4H
2o), BaFe
12o
19deng.And the multi-ferroic material of research is at present all solid-state, comprises multiferroic pottery, multiferroic film, multiferroic monocrystalline etc.There is at present ferroelectric order simultaneously and the orderly single-phase material material of magnetic is few, and these materials or be that magnetic is strong not, be exactly that ferroelectricity is more weak, or be exactly Curie temperature lower (only have and at low temperatures just there is magnetic and ferroelectricity).Solid-state multi-ferroic material has the following disadvantages: 1, the coercive force of solid-state multi-ferroic material is larger, when carry out modulator magnetic with magnetic field or electric field or ferroelectric time, the magnetic field of needs or electric field are also just larger; 2., in time studying its magnetoelectric effect, find that the weak change of Benefit Transfer is not obvious; 3. apply electric field easy greatly by multi-ferroic material damage, cause waste of material; 4. multi-ferroic material just can not change once shaping.Liquid multi-ferroic material have not been reported, and does not also have " multiferroic liquid " this concept in the world.This is because, when multi-ferroic material is in liquefaction then, temperature is general all higher than its ferroelectrie Curie temperature or ferromagnetic Curie temperature, and now multi-ferroic material has lost ferroelectricity and (or) ferromagnetism (or ferrimagnetism, antiferromagnetism).Therefore, this concept that we propose first " multiferroic liquid ", and give its preparation method.
Summary of the invention
In order to solve the deficiency of solid-state multi-ferroic material, the invention provides a kind of multiferroic liquid and preparation method thereof.
The present invention is achieved through the following technical solutions:
A kind of multiferroic liquid, comprises the nano particle of multiferroic, base fluid and surfactant; The inside of described nano particle is ferroelectric material, and the outer surface of described ferroelectric material is wrapped up completely by magnetic material; Described base fluid and described surfactant Homogeneous phase mixing are mixing material, and described nano particle is dispersed in described mixing material and forms stable suspension.
Further, the Li Jing≤20nm of described nano particle.
Further, described nano particle is nanoparticle or the nano wire with multiferroic.
Further, described base fluid is water, organic liquid or aqueous organopolysiloxane.
Further, described base fluid is silicone oil, detergent alkylate, Polybutene oil at least one.
Further, described surfactant is oleic acid, aminododecane, fluorine ether acid, laurate, phenyl undecanoic acid at least one.
Prepare the method for above-mentioned arbitrary described multiferroic liquid, comprise the following steps:
Prepare the nano particle of base fluid, surfactant and drying;
Base fluid and surfactant are uniformly mixed into mixing material, nano particle being added is equipped with in the container of mixing material again, shake container is avoided reuniting, precipitating by nanoparticulate dispersed, airtight container to be also placed on shaking table shake the nano particle of multiferroic is dispersed in mixing material uniformly, thus obtain the multiferroic liquid that stable nano particle volume integral number is V%
Further, the shaking table shake time is greater than half an hour.
Further, in order to make multiferroic liquid more stable, described V% is less than 20%.
Further, in order to make multiferroic liquid more stable, described V% is less than 2%.
Beneficial effect of the present invention:
1, for solid-state multi-iron material, because its coercive force is larger, when carry out modulator magnetic with magnetic field or electric field or ferroelectric time, the field of needs is larger.And multiferroic liquid, its coercive force is less, due to nanoparticle suspension in a liquid, nano particle is subject to the impact of Brownian movement, and the resistance of liquid for nanoparticle movement is much little relative to solid.Under external force, nano particle can rotate in a liquid, and its magnetic moment direction or polarised direction just can correspondingly change, and then inside solid, crystal grain obviously can not rotate, and resistance is very large.
2, for solid-state multi-iron material, when studying its magnetoelectric effect, find that magnetoelectric effect is more weak.Very little to the change of magnetic property when applying electric field, or, very little on the impact of its ferroelectric properties when applying magnetic field.But for multiferroic liquid, each nano particle has magnetic and ferroelectricity simultaneously, when applying electric field, nano particle just rotates, and its magnetic moment also rotates thereupon; Otherwise when applying magnetic field, nano particle, will at ease rotation under magnetic direction owing to being magnetic, and polarised direction also changes; As long as apply very little electric field or magnetic field, magnetic moment direction or polarised direction just can be made to rotate.Multiferroic liquid improves magnetoelectric effect.
3, for solid-state multi-ferroic material, apply electric field excessive, solid-state multi-ferroic material is easy to be damaged by electric field breakdown, and this puncturing is permanent, can not recover.For multiferroic liquid, after some points are broken down by electric field breakdown, only need to remove electricity (magnetic) field, shake, and then apply electricity (magnetic) field, multiferroic liquid can recover again to use.And multiferroic liquid only needs very little electric field just can change its polarised direction, be therefore also not easy breakdown.
4, for solid-state multi-ferroic material, structure, once shaping, just can not change.And multiferroic liquid, due to the mobility of liquid, after applying electricity (magnetic) field, the length thickness of nano chain can be changed easily.The internal structure of multiferroic liquid is variable.Just not to electricity (magnetic) field when not needing, just apply electricity (magnetic) field when needing, after being finished, just can remove electricity (magnetic) field.And by changing the parameter such as size, direction, gradient of electricity (magnetic) field, can arbitrarily control the structure of nano chain.As made photovoltaic cell, use solid-state multi-ferroic material, the thickness of thin layer is exactly constant, and the distance between electrode, the area of electrode are all constant; If nano wire, so the length thickness distance of nano wire is all invariable.Use multiferroic liquid, then by changing the factors such as electricity size direction, (magnetic) field, the length of nano chain, thickness, distance can be changed.
5, multiferroic liquid, has magneto optical effect, refraction effect, these performances do not had in solid iron electric material.
6, under electric field or magnetic fields, in solid-state multi-ferroic material, the orientation of electricdomain can only along some orientation close to direction of an electric field, might not along direction of an electric field, and for multiferroic liquid, because the nano particle of multiferroic can freely rotate in a liquid, therefore the orientation of its electricdomain can completely along direction of an electric field.
Because multiferroic liquid has ferroelectricity, magnetic and mobility simultaneously, therefore there is the electricity of many uniquenesses, magnetics, fluid mechanics, optics and acoustic characteristic.When the more ferrous liquid is placed in uniform electric field or the magnetic field of some strength, when a branch of polarised light passes, the electric vector of polarised light is parallel to external electric field direction and can there are differences perpendicular to external electric field direction absorbing state, thus optically anisotropy, will produce a series of electro optic effect such as Faraday effect, birefringence effect.Multiferroic liquid has the phenomenons such as conductivity frequency dispersion, ferroelectric viscosity in alternating field.Equally, the magnetic of multiferroic liquid can be controlled by electric field, also can apply magnetic field conversely to change its electrical property.
In a word, the present invention proposes multiferroic liquid first and provides preparation method, and new direction has been opened up in the research for multi-ferroic material.And use of the present invention by ferroelectric substance be core, magnetic material wrap up ferroelectric material be the nano particle that shell forms, preparation is simple, and this nano particle has ferroelectricity and magnetic simultaneously, also there is mobility, simultaneously all very sensitive to magnetic (electricity) field, make multiferroic liquid of the present invention have magnetoelectric effect, the magnetoelectric effect of more solid-state multi-ferroic material is stronger.The material of multiferroic of the present invention, has certain using value in transducer, air locking etc.
Accompanying drawing explanation
Fig. 1 is multiferroic liquid schematic diagram of the present invention;
Fig. 2 be multiferroic liquid of the present invention magnetic (electricity) field or magnetic field electric field simultaneously in the presence of nano particle be arranged in chain along the direction of magnetic (electricity) field;
Fig. 3 is that making a mistake property nano particle volume integral number of the present invention is about 2% more, and after applying magnetic field and electric field respectively, transmissivity is along with the variation relation of time;
Fig. 4 is the transmission electron microscope picture of particle.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the invention will be further described.
A kind of multiferroic liquid, comprises the nano particle of multiferroic, base fluid and surfactant.The inside of described nano particle is the core that ferroelectric material forms nano particle, the preferred barium titanate of described ferroelectric material (BTO) or lead zirconate titanate (PZT) (those skilled in the art should know also can use other ferroelectric substances); The outer surface of described ferroelectric material is wrapped up the shell forming nano particle, the preferred tri-iron tetroxide (Fe of described magnetic material completely by magnetic material
3o
4), Conjugate ferrite (CoFe
2o
4, write a Chinese character in simplified form CFO) or γ-Fe
2o
3(those skilled in the art should know also can use other magnetic materials), form the nano particle of the multiferroic of electricity-magnetic nucleocapsid structure.Described base fluid and described surfactant Homogeneous phase mixing are mixing material, and described nano particle is dispersed in described mixing material and forms stable suspension.Li Jing≤the 20nm of described nano particle.The particle diameter of nano particle is the smaller the better, and particle diameter is less, and due to coulomb motion, nano particle is just less likely to occur precipitation.Otherwise particle diameter is larger, owing to being subject to Action of Gravity Field, just easily precipitating, can not suspension be formed.If particle diameter is large, just must selects the base fluid body that density is also very large, offset gravity with buoyancy, just harsher to the selection of base fluid like this, alternative base fluid is just fewer.Described nano particle is nanoparticle or the nano wire with multiferroic.Described base fluid is water, organic liquid or aqueous organopolysiloxane.In order to characterize the multiferroic of multiferroic liquid, just need to apply electric field to multiferroic liquid, make the multiferroic particle in liquid polarized.Therefore, the liquid that base fluid just should select conductivity very poor, such as close to the grease class of insulation, should have some other performance in addition: breakdown strength is high, dielectric loss angle tangent is little, and insulation resistivity is high, and relative dielectric constant is little; Next has excellent process based prediction model.As vapourizing temperature is high, flash-point is high, and difficulty is fired or do not fired as far as possible; Solidifying point is low, suitable viscosity and viscosity-temperature profile; Thermal conductivity is large, and specific heat capacity is large; Heat stability is good, resistance to oxidation; Inspiratory little under electric field action; Compatibility between it and the solid material contacted with it will be got well; Toxicity is low, easily biological-degradable.Also require that source is wide, price is low.Preferably for the silicone oil under high temperature, detergent alkylate or polybutene wet goods.Select the surfactant oleic acid, aminododecane, fluorine ether acid, laurate or the phenyl undecanoic acid that match with the dielectricity of base fluid.Selected surfactant can wrap up described nano particle and can be dissolved in again in selected base fluid.
The preparation of BTO-CFO electricity-magnetic nucleocapsid structure multiferroic liquid
1st step: there is ferroelectric BTO nano particle with sol-gel process preparation
1) preparation of barium precursor liquid: join in barium acetate by appropriate glacial acetic acid, is placed in 80 DEG C of thermostat water bath heating for dissolving, is transferred in volumetric flask after cooling, adopts buret to drip ethylene glycol ethyl ether constant volume and namely obtains Ba precursor liquid.2) preparation of titanium precursor liquid: join in butyl titanate as mixed solvent using glacial acetic acid and ethylene glycol ethyl ether, transfers in volumetric flask after dissolving, and adopts buret instillation ethylene glycol ethyl ether constant volume namely to obtain Ti precursor liquid.Ti precursor liquid is added drop-wise in Ba precursor liquid, adds appropriate acetylacetone,2,4-pentanedione after dropping to adjust dissolved adhesiveness, after mixing, namely obtained the colloidal sol of pure barium titanate through 24 hours.If the colloidal sol of barium titanate doping need be prepared, only need add appropriate La precursor liquid, Nd precursor liquid or Co precursor liquid simultaneously, after hours aging through 24, namely obtain the colloidal sol of barium titanate doping.If be necessary, ethanol in proper amount amine also can be added to control the viscosity of colloidal sol.Then being toasted on heating station by the solution obtained, put into box type furnace and sinter after drying, is 900 DEG C in sintering temperature, and the time is 2h.After fully being ground by products therefrom, obtain BTO nano particle.
2nd step: the preparation preparing BTO-CFO electricity-magnetic core-shell structure magnetic particle with coprecipitation
By FeCl
36H2O (0.04mol, 100mL) and Co (NO
3)
26H2O (0.02mol, 100mL) mixes, and adds NaOH (0.35mol, 500mL), is then joined in mixed solution by the BTO ferroelectric nanoparticles prepared in step 1, then be heated to boiling, the rapid stirring of companion.Boiling takes off natural sedimentation after continuing 1min.Abundant precipitation uses the H (NO) of 1mol/L afterwards
3solution cleans sediment until pH value is 7, then cleaning products therefrom is obtained the required BTO-CFO nano particle with electricity-magnetic nucleocapsid structure after the operations such as acetone dehydration, drying.
3rd step: the preparation of BTO-CFO electricity-magnetic nucleocapsid structure multiferroic liquid
The BTO-CFO nano particle with electricity-magnetic nucleocapsid structure of certain mass is dispersed in certain density silicone oil uniformly.Due to silicone oil there is high-low temperature resistant, the feature such as chemical stability is good, steam forces down, viscosity temperature influence is little, be the desirable carrier fluid of multiferroic liquid.But the characteristic of silicone oil water and oil repellence makes the surfactant by the BTO-CFO nano particle with electricity-magnetic nucleocapsid structure is dispersed in wherein must have oleophylic performance, and energy coated magnetic particle, otherwise easily there is the phenomenons such as reunion, sedimentation.Therefore, use oleic acid as surfactant.
Be specially: the BTO-CFO multiferroic liquid with electricity-magnetic nucleocapsid structure that configuration BTO-CFO multiferroic nano particle volume integral number is 5%, cumulative volume is 100ml, so, required particle volume is 5ml, and its density is about 6g/cm
3, then the quality of particle is needed to be 30g; The concentration of oleic acid is 2%, then need the oleic acid measuring 2ml; The volume of silicone oil is 100-5-2=93ml.
First, (volume is about 5cm to weigh the BTO-CFO with electricity-magnetic nucleocapsid structure of 30g
3), be mixing material the silicone oil Homogeneous phase mixing of the oleic acid of 2ml and 93ml, BTO-CFO nano particle is joined in mixing material, rock, prevent particle agglomeration, precipitation, again solution to be loaded in airtight container and is placed on shaking table and shake (airtight container is to prevent solution to be thrown out of in shake process), 1 hour time of shake, namely obtain the BTO-CFO multiferroic liquid with electricity-magnetic nucleocapsid structure that grain volume fraction is 5%, cumulative volume is 100ml.
Fig. 1 is multiferroic liquid schematic diagram, and in Fig. 1, the black part representative of circle inside has ferroelectric nano particle, can be BTO, PZT etc.The grey wrapping portion of black circles outer surface represents the magnetic integument of tool, can be CFO, Fe
3o
4deng.Regional Representative's base fluid of grey can be water, acid, oil, hydrocarbon etc.As shown in Figure 1, when not applying electricity (magnetic) field to multiferroic liquid, the nanoparticle arrangement in multiferroic liquid is random is in disordered state.
As shown in Figure 2, electricity (magnetic) field (or simultaneously applying the identical Electric and magnetic fields in direction) is applied to multiferroic liquid, along the direction of additional " field ", the nano particle simultaneously with ferroelectricity and magnetic just forms chain along the direction ordered arrangement of " field ", therefore other character of multiferroic liquid can be regulated and controled, such as light transmission.Therefore, apply the magnetic that electric field can regulate and control particle, its ferroelectricity can also be regulated and controled; On the other hand, magnetic field is applied to multiferroic liquid, not only can regulate and control the magnetic of particle, its ferroelectricity can also be regulated and controled.Illustrate that such liquid has magneto-electric coupled performance.Many regulation and control can be carried out to multiferroic liquid.There is certain using value in transducer, air locking etc.
As shown in Figure 3,4, in Fig. 3, the nano particle volume integral number of multiferroic is about 2%, and the time is represented non-applied field before 0; A applies electric field 500kV/m for applying magnetic field 1000Gs, b, as can be seen from Figure 3, by changing the light transmittance of multiferroic liquid to multiferroic liquid applying electric field or magnetic field energy.
Claims (10)
1. a multiferroic liquid, is characterized in that: comprise the nano particle of multiferroic, base fluid and surfactant; The inside of described nano particle is ferroelectric material, and the outer surface of described ferroelectric material is wrapped up completely by magnetic material; Described base fluid and described surfactant Homogeneous phase mixing are mixing material, and described nano particle is dispersed in described mixing material and forms stable suspension.
2. multiferroic liquid according to claim 1, is characterized in that: the Li Jing≤20nm of described nano particle.
3. multiferroic liquid according to claim 1, is characterized in that: described nano particle is nanoparticle or the nano wire with multiferroic.
4. multiferroic liquid according to claim 1, is characterized in that: described base fluid is water, organic liquid or aqueous organopolysiloxane.
5. multiferroic liquid according to claim 1, is characterized in that: described base fluid is silicone oil, detergent alkylate, Polybutene oil at least one.
6. multiferroic liquid according to claim 1, is characterized in that: described surfactant is oleic acid, aminododecane, fluorine ether acid, laurate, phenyl undecanoic acid at least one.
7. prepare the method for the arbitrary described multiferroic liquid of claim 1 to 5, it is characterized in that: comprise the following steps:
Prepare the nano particle of base fluid, surfactant and drying;
Base fluid and surfactant are uniformly mixed into mixing material, nano particle being added is equipped with in the container of mixing material again, shake container is avoided reuniting, precipitating by nanoparticulate dispersed, airtight container to be also placed on shaking table shake the nano particle of multiferroic is dispersed in mixing material uniformly, thus obtain the multiferroic liquid that stable nano particle volume integral number is V%
8. the method preparing multiferroic liquid according to claim 7, is characterized in that: the shaking table shake time is greater than half an hour.
9. the method preparing multiferroic liquid according to claim 7, is characterized in that: described V% is less than 20%.
10. the method preparing multiferroic liquid according to claim 7, is characterized in that: described V% is less than 2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510426566.5A CN105097177A (en) | 2015-07-20 | 2015-07-20 | Multiferroic liquid and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510426566.5A CN105097177A (en) | 2015-07-20 | 2015-07-20 | Multiferroic liquid and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105097177A true CN105097177A (en) | 2015-11-25 |
Family
ID=54577409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510426566.5A Pending CN105097177A (en) | 2015-07-20 | 2015-07-20 | Multiferroic liquid and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105097177A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254413A (en) * | 2018-01-29 | 2018-07-06 | 重庆科技学院 | A kind of device and method for testing multiferroic liquid |
| CN108254412A (en) * | 2018-01-29 | 2018-07-06 | 重庆科技学院 | A kind of test device and method of multiferroic liquid |
| CN108445058A (en) * | 2018-03-07 | 2018-08-24 | 重庆科技学院 | Multiferroic liquid physics characteristic test device |
| CN109037435A (en) * | 2018-08-29 | 2018-12-18 | 郑州轻工业学院 | A kind of preparation method of the magnetoelectricity nanocomposite based on biological assisted self assembling |
| CN110194841A (en) * | 2019-06-14 | 2019-09-03 | 清华大学深圳研究生院 | The preparation method of dielectric gradient material and the encapsulating method of electronic component |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475930A (en) * | 2008-12-26 | 2009-07-08 | 中国科学院过程工程研究所 | Superparamagnetic nano particle in situ adsorptive separation-immobilized Rhodococcus biological desulphurization process |
| CN101804968A (en) * | 2010-03-19 | 2010-08-18 | 清华大学 | Direct synthesis method of nanometer oxide powder |
| CN102093045A (en) * | 2010-12-01 | 2011-06-15 | 北京航空航天大学 | Barium titanate and barium ferrite composite powder with nucleus shell structure and preparation method thereof |
| CN102285692A (en) * | 2011-06-16 | 2011-12-21 | 西南大学 | Preparation of colloid with strong magneto optic effect |
| CN103506620A (en) * | 2013-09-22 | 2014-01-15 | 陕西师范大学 | Barium ferrite/barium titanate core-shell particle |
| CN103740365A (en) * | 2014-01-14 | 2014-04-23 | 重庆三峡学院 | FeOOH-ZnFe2O4 mixed magnetic fluid and preparation method thereof |
-
2015
- 2015-07-20 CN CN201510426566.5A patent/CN105097177A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475930A (en) * | 2008-12-26 | 2009-07-08 | 中国科学院过程工程研究所 | Superparamagnetic nano particle in situ adsorptive separation-immobilized Rhodococcus biological desulphurization process |
| CN101804968A (en) * | 2010-03-19 | 2010-08-18 | 清华大学 | Direct synthesis method of nanometer oxide powder |
| CN102093045A (en) * | 2010-12-01 | 2011-06-15 | 北京航空航天大学 | Barium titanate and barium ferrite composite powder with nucleus shell structure and preparation method thereof |
| CN102285692A (en) * | 2011-06-16 | 2011-12-21 | 西南大学 | Preparation of colloid with strong magneto optic effect |
| CN103506620A (en) * | 2013-09-22 | 2014-01-15 | 陕西师范大学 | Barium ferrite/barium titanate core-shell particle |
| CN103740365A (en) * | 2014-01-14 | 2014-04-23 | 重庆三峡学院 | FeOOH-ZnFe2O4 mixed magnetic fluid and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| FLAVIA C.C.OLIVEIRA，ET AL: "Magnetic Fluids Based on γ-Fe2O3 and CoFe2O4 Nanoparticles Dispersed in Ionic Liquids", 《J.PHYS.CHEM.C》 * |
| SWAPNA NAIR，ET AL: "Proposed multiferroic/magneto electric fluids: prospects, techniques and probable candidates", 《CHAOS AND COMPLEXITY LETTERS》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254413A (en) * | 2018-01-29 | 2018-07-06 | 重庆科技学院 | A kind of device and method for testing multiferroic liquid |
| CN108254412A (en) * | 2018-01-29 | 2018-07-06 | 重庆科技学院 | A kind of test device and method of multiferroic liquid |
| CN108254413B (en) * | 2018-01-29 | 2023-10-27 | 重庆科技学院 | Device and method for testing multiferroic liquid |
| CN108254412B (en) * | 2018-01-29 | 2023-10-27 | 重庆科技学院 | Testing device and method for multiferroic liquid |
| CN108445058A (en) * | 2018-03-07 | 2018-08-24 | 重庆科技学院 | Multiferroic liquid physics characteristic test device |
| CN108445058B (en) * | 2018-03-07 | 2023-06-06 | 重庆科技学院 | Multiferroic liquid physical property testing device |
| CN109037435A (en) * | 2018-08-29 | 2018-12-18 | 郑州轻工业学院 | A kind of preparation method of the magnetoelectricity nanocomposite based on biological assisted self assembling |
| CN109037435B (en) * | 2018-08-29 | 2021-11-05 | 郑州轻工业学院 | Preparation method of magnetoelectric nanocomposite based on biological-assisted self-assembly |
| CN110194841A (en) * | 2019-06-14 | 2019-09-03 | 清华大学深圳研究生院 | The preparation method of dielectric gradient material and the encapsulating method of electronic component |
| CN110194841B (en) * | 2019-06-14 | 2022-02-25 | 清华大学深圳研究生院 | Preparation method of dielectric gradient material and encapsulation method of electronic component |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105006329B (en) | A kind of multiferroic liquid and preparation method thereof | |
| CN105097177A (en) | Multiferroic liquid and preparation method thereof | |
| Verma et al. | Magnetic field control of polarization/capacitance/voltage/resistance through lattice strain in BaTiO3-CoFe2O4 multiferroic nanocomposite | |
| Peddis et al. | Coexistence of superparmagnetism and spin-glass like magnetic ordering phenomena in a CoFe2O4− SiO2 nanocomposite | |
| CN105023692A (en) | Multiferroic liquid and preparation method thereof | |
| Sozeri et al. | Polyaniline (PANI)–Co0. 5Mn0. 5Fe2O4 nanocomposite: Synthesis, characterization and magnetic properties evaluation | |
| Zhang et al. | Hydrothermal synthesis and size‐dependent properties of multiferroic bismuth ferrite crystallites | |
| Kim et al. | Strong magnetoelectric coupling in mixed ferrimagnetic-multiferroic phases of a double perovskite | |
| Matt et al. | Soft Magnets from the Self‐Organization of Magnetic Nanoparticles in Twisted Liquid Crystals | |
| Verma et al. | Lattice defects induce multiferroic responses in Ce, La‐substituted BaFe0. 01Ti0. 99O3 nanostructures | |
| Anjum et al. | Influence of antimony substitution on structural, magnetic and optical properties of cadmium spinel ferrite | |
| CN105016396A (en) | Multiferroic liquid and preparation method thereof | |
| Tourinho et al. | Electric double layered magnetic fluids (EDL-MF) based on spinel ferrite nanostructures [(M1-x+ 2Fex+ 3)] A [(Fe2-x+ 3 Mx+ 2)] BO4-2 | |
| Sadhukhan et al. | Multiferroic properties and magnetoelectric coupling observed in nanocrystalline HoFeO3 | |
| Kumari et al. | Role of La substitution on structural, optical, and multiferroic properties of BiFeO3 nanoparticles | |
| Mornet et al. | Ferroelectric-based nanocomposites: toward multifunctional materials | |
| Wang et al. | Magnetoresistance of La 0.5 Sr 0.5 MnO 3 nanoparticle compact | |
| Paterno et al. | Fabrication and characterization of nanostructured conducting polymer films containing magnetic nanoparticles | |
| Cai et al. | Short-range magnetic ordered state above TC in double perovskite Dy 2 NiMnO 6 | |
| Gandhi et al. | Strong pinned-spin-mediated memory effect in NiO nanoparticles | |
| Khan et al. | Magnetic properties of Ni/BiFeO3 hybrid nanostructures | |
| Kumari et al. | Effect of temperature on magnetic and impedance properties of Fe3BO6 of nanotubular structure with a bonded B2O3 surface layer | |
| Zhang et al. | Nanometer size effect on the structure and magnetic properties of high oxygen content ferromagnetic PrMnO3+ δ nanoparticles | |
| CN105139991A (en) | Ferroelectric liquid and preparation method thereof | |
| Vivek et al. | Exchange bias in BiFeO3 and Bi0. 9La0. 1FeO3 nanoparticles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151125 |
|
| RJ01 | Rejection of invention patent application after publication |