CN105139991A - Ferroelectric liquid and preparation method thereof - Google Patents
Ferroelectric liquid and preparation method thereof Download PDFInfo
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- CN105139991A CN105139991A CN201510426568.4A CN201510426568A CN105139991A CN 105139991 A CN105139991 A CN 105139991A CN 201510426568 A CN201510426568 A CN 201510426568A CN 105139991 A CN105139991 A CN 105139991A
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- ferroelectric
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- ferroelectricity
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Abstract
The invention discloses a ferroelectric liquid and a preparation method thereof. The ferroelectric liquid is stable suspension which is formed by evenly dispersing ferroelectric nano particles into a mixed liquid of base liquid and a surfactant. The preparation method is simple, and comprises the following steps: evenly mixing the base liquid and the surfactant into the mixed liquid; adding the ferroelectric nano particles into the mixed liquid, and shaking the mixed liquid; and finally shaking the mixed liquid on a table concentrator, so as to obtain the ferroelectric liquid. The ferroelectric liquid has ferroelectricity and mobility; the ferroelectric nano particles easily change under the action of an external electric field, so that regulation and control of the performance of the ferroelectric liquid are achieved; and a brand-new research direction is provided for researches of ferroelectric materials.
Description
Technical field
The invention belongs to ferroelectric material field, be specifically related to a kind of ferroelectricity liquid and preparation method thereof.
Background technology
Some crystal is in the state of spontaneous polarization, and has spontaneous polarization strength, and in certain temperature range, spontaneous polarization dipole moment can change with the direction of executing electric field outward.The region of these spontaneous polarizations is called electricdomain, and the polarised direction in each electricdomain is consistent, and the polarised direction of adjacent electricdomain is then different.Macroscopic view, whole crystal is non-polarised, in neutral.Under External Electrical Field, the electricdomain polarized along direction of an electric field expands, and polarised direction is tending towards the arrangement of outer field direction, its spontaneous polarization can do reversible rotation with external electric field, this character is called ferroelectricity, the same with ferromagnetic material, and 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.
But the ferroelectric material of research is at present all solid-state, comprises ferroelectric ceramic, ferroelectric thin film, ferro-electricity single crystal etc.Solid iron electric material has larger coercive electric field, needs larger electric field the electric polarization direction of ferroelectric substance could be changed, and the electric field as applied is excessive easily solid iron electric material punch through damage, causes the waste of ferroelectric material.Liquid ferroelectric material have not been reported, and does not also have " ferroelectricity liquid " this concept in the world.This is because when ferroelectric material is in liquefaction then, temperature is generally all higher than its ferroelectrie Curie temperature, and now ferroelectric material loses ferroelectricity.Therefore, we propose " ferroelectricity liquid " (or being ferroelectric fluids) this concept in the world first, and give its preparation method.
Summary of the invention
Comparatively large in order to solve solid iron electric material coercive electric field, be not easy regulation and control solid iron electric material, the invention provides a kind of ferroelectricity liquid and preparation method.
The present invention is achieved through the following technical solutions:
Ferroelectricity liquid, comprises and has ferroelectric nano particle, base fluid, surfactant, and described base fluid and described surfactant are uniformly mixed into mixing material, and described ferroelectric 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 has ferroelectric nanoparticle or nano wire.
Further, described base fluid is water, organic liquid or aqueous organopolysiloxane.
Further, described base fluid is silicone oil, detergent alkylate or Polybutene oil.
Further, described surfactant is enuatrol or aminododecane.
Prepare the method for above-mentioned arbitrary described ferroelectricity 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 ferroelectric nano particle is dispersed in mixing material uniformly, thus obtain the ferroelectricity liquid that ferroelectric nano particle volume integral number is V%
Further, be dispersed in uniformly in mixing material form stable ferroelectricity liquid to make ferroelectric nano particle, the shaking table shake time is greater than half an hour.
Further, in order to make ferroelectricity liquid more stable, described V% is less than 20%.
Further, in order to make ferroelectricity liquid more stable, described V% is less than 2%.
Beneficial effect of the present invention:
1, to solid iron electric material, because its coercive force is larger, when regulate and control ferroelectric crystal grain polarised direction with electric field time, the electric field of needs is larger.For ferroelectricity liquid, due to ferroelectric nanoparticle suspension in a liquid, nano particle is subject to the impact of Brownian movement, and liquid is much little relative to solid iron electric material for the resistance of nanoparticle movement.Under external force, nano particle can rotate in a liquid, and its electric moment direction just can correspondingly change, but for solid iron electric material, crystal grain obviously can not rotate, and resistance is very large.
2, for solid iron electric material, if it is excessive to apply electric field, solid iron electric material just easily can not be re-used by electric field breakdown, and this puncturing is permanent, irreclaimable, causes the waste of solid iron electric material.For ferroelectricity liquid, some points are breakdown break down after, only need to remove outfield, shake, and then apply outfield, can recover again use.And ferroelectricity liquid only needs very little electric field just can change its polarised direction, be therefore also not easy breakdown.
3, for solid iron electric material, structure, once shaping, just can not change.And for ferroelectricity liquid, due to the mobility of liquid, its internal structure is variable.After outfield is applied to ferroelectricity liquid, the length thickness of nano chain can be changed easily.And by changing the parameter such as size, direction, gradient in outfield, can arbitrarily control the structure of nano chain.As, make photovoltaic cell, use solid iron electric 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.If use ferroelectricity liquid, then by changing the factors such as size direction, outfield, the length thickness distance of nano chain can be changed.
4, for ferroelectricity liquid, electro optic effect, field cause the performance that refraction effect does not have in solid iron electric material in addition.
5, under electric field action, in solid iron electric 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 ferroelectricity liquid, because ferromagnetic fine particles can freely rotate in a liquid, therefore the orientation of its electricdomain can completely along direction of an electric field.
The present invention is mover iron conductive liquid concept first, and the research for ferroelectric material opens a brand-new research direction; Because ferroelectricity liquid has ferroelectricity and mobility simultaneously, there is ferroelectric of many uniquenesses, fluid mechanics, optics and acoustic characteristic.Relative to solid-state ferroelectric material, with electric field, ferroelectricity liquid is regulated and controled just than being easier to; Because its shape is indefinite, be easy to regulation and control, switch can be made.Compared with mechanical optical switch, there is following advantage: 1, switching speed is fast: <0.2ms; 2, reliability is high: >100 hundred million upsets, without moving-member.3, compact.When ferroelectricity liquid is placed in the uniform electric 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 effects such as birefringence effect.Ferroelectricity liquid has the phenomenons such as conductivity frequency dispersion, ferroelectric viscosity in alternating field.Be conducive to applying ferroelectric material better.
Accompanying drawing explanation
Fig. 1 is the transmission electron microscope picture of BTO particulate;
The transmitance that Fig. 2 is BTO ferroelectricity liquid under not same electric field;
Fig. 3 is the transmissivity of BTO/Si film not under same electric field.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
A kind of ferroelectricity liquid, comprise ferroelectric nano particle, base fluid, surfactant, described base fluid and described surfactant are uniformly mixed into mixing material, and described nano particle is dispersed in described mixing material and forms stable suspension.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.Li Jing≤the 20nm of described nano particle.Described nano particle has ferroelectric nanoparticle or nano wire.Described base fluid is water, organic liquid or aqueous organopolysiloxane.In order to characterize the ferroelectricity of ferroelectricity liquid, just need to apply electric field to ferroelectricity liquid, make the ferroelectricity nano 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 oil.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 be dissolved in again in selected base fluid by coated described nano particle.
BaTiO
3(BTO) preparation of ferroelectricity liquid:
1st step: there is ferroelectric BTO nano particle with solid reaction process preparation:
By raw material Ba
2o
3and Ti
2o
3, calculate quality needed for each raw material according to atomic molar than the ratio of Ba:Ti=1:1 and the purity of raw material, fully grinding makes its Homogeneous phase mixing.Then above-mentioned powder put into the crucible cleaned up and be placed in Muffle furnace, at 900 DEG C of first time pre-burning 10h, tentatively becoming phase.Products therefrom at 1100 DEG C of calcining 30h, makes raw material complete reaction after fully grinding.Carry out third time fully grinding again, obtain BTO nano particle.
2nd step: preparation BTO ferroelectricity liquid
The BTO nano particle of certain mass is dispersed in certain density silicone oil uniformly.The features such as silicone oil has high-low temperature resistant, chemical stability is good, steam forces down, viscosity temperature influence is little are the desirable carrier fluids of ferroelectricity liquid.But the characteristic of silicone oil water and oil repellence makes the surfactant be scattered in wherein by ferroelectricity BTO particulate homogenous must have oleophylic performance, and the coated ferroelectricity particulate of energy, otherwise easily there is the phenomenons such as reunion, sedimentation.Select oleic acid as surfactant.
Configuration volume fraction is 5%, and volume is the BTO ferroelectricity liquid of 100ml, and so, required BTO particulate volume is 5ml, and its density is about 6g/cm
3, then the quality of BTO 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 nanoparticle of 30g
3), join in the mixing material of 2ml oleic acid and 93ml silicone oil, shake, in the vial putting good seal into or other container, shaking table carries out shake about 1 hour.Namely the BTO ferroelectricity liquid that volume fraction is 5%, volume is 100ml is obtained.
Fig. 1 is the transmission electron microscope picture of BTO particulate, and the transmitance that Fig. 2 is BTO ferroelectricity liquid under not same electric field, with initial transmissivity for 1.In Fig. 2, the electric field that a applies is 5kV/m; The electric field that b applies is 15kV/m.Apply electric field along vertical direction to BTO ferroelectricity liquid, and the light transmission under measuring not same electric field along direction of an electric field, in a, when to apply electric field be 5kV/m time, the transmitance of light drops to 60% at first, then slowly recovers.Spend 200 seconds to measure again, obtained transmitance and reach about 90%.Electric field strength is become 15kV/m, and the transmitance of light drops to 15% at first, then slowly recovers.Spend 400 seconds to measure again, obtained transmitance and reach more than 90%.Known, by changing the size of electric field, can light transmission be changed, transmissivity can also be changed and returned to for more than 90% required time.Show that electric field has regulating and controlling effect to the transmissivity of light in ferroelectricity liquid.The situation of change of transmissivity also illustrate that the structural change of particulate in ferroelectricity liquid.Certainly, transmitance is also relevant with several factors, the concentration of such as particulate, the size of electric field, the length of action time, the size etc. of electric-force gradient.But for BTO film, it doesn't matter to applied electric field level for the transmissivity of light.Fig. 3 is the transmissivity of BTO/Si film not under same electric field, and with initial transmissivity for 1, as can be known from Fig. 3, electric field does not significantly affect the transmissivity of light in film.
Claims (10)
1. a ferroelectricity liquid, it is characterized in that: comprise ferroelectric nano particle, base fluid, surfactant, described base fluid and described surfactant are uniformly mixed into mixing material, and described ferroelectric nano particle is dispersed in described mixing material and forms stable suspension.
2. ferroelectricity liquid according to claim 1, is characterized in that: the Li Jing≤20nm of described nano particle.
3. ferroelectricity liquid according to claim 1, is characterized in that: described nano particle has ferroelectric nanoparticle or nano wire.
4. ferroelectricity liquid according to claim 1, is characterized in that: described base fluid is water, organic liquid or aqueous organopolysiloxane.
5. ferroelectricity liquid according to claim 1, is characterized in that: described base fluid is silicone oil, detergent alkylate or Polybutene oil.
6. ferroelectricity liquid according to claim 1, is characterized in that: described surfactant is enuatrol or aminododecane.
7. prepare the method for the arbitrary described ferroelectricity liquid of claim 1-6, 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 ferroelectric nano particle is dispersed in mixing material uniformly, thus obtain the ferroelectricity liquid that ferroelectric nano particle volume integral number is V%
8. the method preparing ferroelectricity liquid according to claim 7, is characterized in that: the shake time is greater than half an hour.
9. the method preparing ferroelectricity liquid according to claim 7, is characterized in that: described V% is less than 20%.
10. the method preparing ferroelectricity liquid according to claim 7, is characterized in that: described V% is less than 2%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037596A (en) * | 2017-11-22 | 2018-05-15 | 郑州工商学院 | A kind of apparatus and method for improving ferroelectricity liquid light switch characteristic |
| JP2021513100A (en) * | 2018-07-12 | 2021-05-20 | チョーチアン チンイー ニュー マテリアル テクノロジー カンパニー リミテッドＺｈｅｊｉａｎｇ Ｊｉｎｇｙｉ Ｎｅｗ Ｍａｔｅｒｉａｌ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．Ｌｔｄ | Halide ABX3 Perovskite Particles and Their Applications for Optical Flux Control |
Citations (5)
| 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 |
| CN102285692A (en) * | 2011-06-16 | 2011-12-21 | 西南大学 | Preparation of colloid with strong magneto optic effect |
| JP2012058677A (en) * | 2010-09-13 | 2012-03-22 | Toshinobu Yogo | Field-responsive nanocomposite fluid and dimming element |
| CN102786935A (en) * | 2012-08-28 | 2012-11-21 | 昆山龙腾光电有限公司 | Blue-phase liquid crystal composite and manufacturing method of blue-phase liquid crystal composite |
| 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 CN201510426568.4A patent/CN105139991A/en active Pending
Patent Citations (5)
| 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 |
| JP2012058677A (en) * | 2010-09-13 | 2012-03-22 | Toshinobu Yogo | Field-responsive nanocomposite fluid and dimming element |
| CN102285692A (en) * | 2011-06-16 | 2011-12-21 | 西南大学 | Preparation of colloid with strong magneto optic effect |
| CN102786935A (en) * | 2012-08-28 | 2012-11-21 | 昆山龙腾光电有限公司 | Blue-phase liquid crystal composite and manufacturing method of blue-phase liquid crystal composite |
| 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 (1)
| Title |
|---|
| SWAPNA NAIR等: "Proposed multiferroic/magneto electric fluids：prospects", 《TECHNIQUES AND PROBABLE CANDIDATES》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037596A (en) * | 2017-11-22 | 2018-05-15 | 郑州工商学院 | A kind of apparatus and method for improving ferroelectricity liquid light switch characteristic |
| JP2021513100A (en) * | 2018-07-12 | 2021-05-20 | チョーチアン チンイー ニュー マテリアル テクノロジー カンパニー リミテッドＺｈｅｊｉａｎｇ Ｊｉｎｇｙｉ Ｎｅｗ Ｍａｔｅｒｉａｌ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．Ｌｔｄ | Halide ABX3 Perovskite Particles and Their Applications for Optical Flux Control |
| JP7064005B2 (en) | 2018-07-12 | 2022-05-09 | チョーチアン チンイー ニュー マテリアル テクノロジー カンパニー リミテッド | Halide ABX3 perovskite particles and their applications for optical flux control |
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