CN106277071A - One can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2o4the preparation method of powder - Google Patents
One can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2o4the preparation method of powder Download PDFInfo
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Abstract
One can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4The preparation method of powder, the present invention relates to nano Co Fe2O4The preparation method of powder.The present invention is to solve at present because of CoFe2O4Magnetic nano-particle before non-surface treated poor compatibility, easily reunite, it is impossible to preparation nanometer dielectric problem compound with polyethylene.Method: one, weigh；Two, mixed solution is prepared；Three, preparation nano Co Fe2O4Precast body；Four, nano Co Fe is prepared2O4Powder.The present invention accurately controls nano Co Fe of preparation2O4The particle diameter of powder, and select suitable coating material that its surface is modified so that it is Surface coating has and can have the specific functional groups of excellent compatibility with polyethylene, and this coating material may also operate as suppressing nm level CoFe simultaneously2O4Powder ball is polymerized to block, accurately control nm level CoFe2O4The effect in powder footpath.The present invention is used for preparing and compound with polyethylene can prepare dielectric nano Co Fe of nanometer2O4Powder.
Description
Technical field
The present invention relates to nano Co Fe2O4The preparation method of powder.
Background technology
Nanometer electrolyte, progressively substituting traditional insulator materials as insulant has become research and development High Performance Insulation dielectric inevitable development trend.Compared with traditional micron order complex based dielectric material, in nanometer electrolyte, nanoparticle specific surface area is big, activity is high and is prone to be formed huge boundary zone between matrix high polymer, produces the complicated interface structure that interaction force is strong, therefore can be from different aspect, improve dielectric electrical property to varying degrees.At present, utilize nanoparticle that Polymer Based Insulation Materials is modified, prepare nanometer electrolyte achieved with certain effect.The application in electric insulation field of the nanometer electrolyte is concentrated mainly on the following aspects: 1. high voltage rotating machine insulate.Nanometer electrolyte can reduce motor size, improve the good Inverter fed motor ageing properties of running reliability of motor, reduction cost, and nanometer electrolyte and heat conductivility, it is possible to extend the electrical machine insulation life-span；2. high pressure extrusion cable insulation.Nanometer electrolyte is obvious in aspect effects such as suppression space charge accumulation, reduction dielectric constant, raising breakdown performances, can improve cable working voltage grade and reliability；3. mesolow extrusion cable insulation.Nanometer electrolyte has the water-fast and resistance to environmental aging performance of excellence；4. capacitor insulation.Using nanometer electrolyte as the dielectric of capacitor, can relatively improve its energy storage density (the nanometer electrolyte of application super large dielectric constant) and the pressure grade of capacitor and reduce the loss etc. of alternating electromotive force capacitor；5. molding high potential assembly and adnexa dielectric thereof.The dielectric use of nanometer can improve combination property and the reliability of power equipment.
Along with going deep into and the demand of power industry of nanometer electrolyte research, nanometer electrolyte future developing trend can be divided into following several stages: 1. primary stage (at present), the nanometer dielectric substance of electrical, thermal and mechanical properties can be improved with inorganic nanoparticles doping preparation simultaneously, be mainly used in enamel insulation, electric classification, electromagnetic shielding；2. intermediate stage, has the nanometer electrolyte of anisotropy thermal conductivity, is mainly used in cable and high-tension electric motor insulation with one-dimensional or the doping preparation of two-dimensional nano filler；3. advanced stage, prepare nanometer dielectric substance with Supramolecular Assembling method, be mainly used in ultracapacitor, electrostriction material, sensor, intelligent adaptive dielectric substance etc..
Low Density Polyethylene (LDPE) is widely used in high voltage power cable with its excellent dielectric and mechanical performance, and it is also one of most widely used polymeric material in electric insulation field.The prepared nanometer electrolyte of inorganic nano particle modified polyethylene (PE) can be while improving its environmental aging performance hot, mechanical, fire-retardant, resistance to, significantly improve its dielectric properties, as improved disruptive field intensity, strengthening resistance to electrical tree aging process and resistant to partial discharges ability, suppression space charge accumulation etc., this is of great significance improving insulant performance tool, and the research being thus directed towards LDPE base nanocomposite dielectric starts the extensive concern by Chinese scholars.Make a general survey of the development of whole nanometer dielectric substance, be the most generally in the primary stage preparing the nanometer dielectric substance that can simultaneously improve electrical, thermal and mechanical properties with inorganic nanoparticles doped polymer matrix.PE base nanometer electrolyte is no exception, remains in, based on the inorganic nano-particle of metal-oxide (MO) system, it is modified the stage.Due to the MO particle that these are conventional, such as TiO2、MgO、ZnO、SiO2、BaTiO3、Al2O3, montmorillonite (MMT) etc., it is impossible to make PE base nanometer dielectric substance present obvious anisotropy, thus the research to PE base nanometer dielectric substance also can only rest on electricity, heat, mechanical property comprehensive study stage.The property how breaking this deadlock, beneficially nanoparticle gives the obvious anisotropic properties of nanometer electrolyte, promotes the research to it to higher development, becomes a problem being worth everybody thinking.Inverse spinel structure Fe3O4Nanoparticle, as a kind of MO particle with property, there is small-size effect and the special magnetic property of nanoparticle simultaneously, this nanometer electrolyte may be made to have magnetic its prepare nanometer electrolyte compound with LDPE, it is beneficial to magnetic and realizes anisotropic properties, it is possible to promote LDPE base nanometer electrolyte to high-level research and development.But nanometer Fe3O4The specific surface area of particle own is the biggest, there is special surface nature, as: nanoparticle is in upper state, system has the biggest surface Gibbs free energy, for thermodynamic unstable system, can spontaneously reunite, aoxidize or atomic number that surface adsorption is unstable to reduce surface, reduce the energy of system, be prone to oxidation when high temperature or partial oxidation becomes Fe2O3.So, although its synthetic method is a lot, there is due to it shortcomings such as poor compatibility, easily reunion, life-span short, easy high-temperature oxydation, easily reuniting and oxidation during LDPE compound (general combined temp is more than 150 DEG C) so that it is apply limited.Nano Co Fe2O4Particle is inverse spinel structure MFe2O4Particle, itself and Fe3O4Nanoparticle has a similar magnetic property, but resistance to elevated temperatures Fe to be significantly better than3O4Nanoparticle, if by its prepared magnetic Nano composite dielectric material compound with LDPE, can be while giving LDPE magnetic property, it is ensured that CoFe2O4Nanoparticle will not aoxidize because of higher combined temp.Poor compatibility due to LDPE molecule itself Yu nanoparticle, it is therefore necessary in advance to CoFe2O4Nanoparticle surface carries out special modification, to improve the compatibility between the two and dispersion stabilization.
Summary of the invention
The present invention is to solve current Fe3O4Magnetic nano-particle poor high temperature stability, thus by part Fe therein2+Atom Co2+Atom substitutes, and obtains the magnetic Nano CoFe that high-temperature stability is good2O4Particle, and due to poor with polyethylene compatible before the non-surface treated of nano-metal-oxide particle, easily reunite, it is impossible to the compound dielectric problem of polyvinyl nanometer of preparing, and provide the one can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4The preparation method of powder.
One can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4The preparation method of powder, specifically prepares according to following steps:
One, 9 ~ 11 parts of CoSO are weighed by weight4, 10 ~ 25 parts of FeCl3, 1 ~ 3 part of coating material and 25 ~ 40 parts of sodium stearates；
Two, the CoSO that step one is weighed4、FeCl3Mixed solution is obtained with in the mixed solution that sodium stearate is dissolved in distilled water and dehydrated alcohol, wherein, the volume ratio of distilled water and dehydrated alcohol is 1:1 ~ 3, then adds normal heptane in system, and normal heptane is 1 ~ 3:1 with the volume ratio of distilled water and dehydrated alcohol mixed liquor；
Three, under the conditions of magnetic agitation, mixed solution step 2 obtained is warming up to 70 ~ 100 DEG C, take off and after cooling stands, take upper liquid addition high temperature hydrothermal reaction kettle, add the coating material that step one weighs, react putting into constant temperature oven after airtight for reactor, oven temperature is 250 ~ 350 DEG C, is incubated 1 ~ 24h, obtains nano Co Fe2O4Precast body；
Four, nano Co Fe that step 3 is obtained2O4Precast body dehydrated alcohol, cleans 2 ~ 5 times, then through high speed centrifuge centrifugation, obtaining one can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4Powder, centrifuge speed is 6000 ~ 12000r/min, and centrifugation time is 5 ~ 20min, obtains nano Co Fe that particle diameter is 4 ~ 10nm2O4Powder.
Above-mentioned nano Co Fe2O4Powder and the polyethylene compound preparation dielectric method of nanometer, specifically prepare according to following steps:
A, nano Co Fe prepared by claim 12O4Powder premixes with polyethylene, is subsequently adding in double screw extruder, and 0.5 ~ 1h is blended under the conditions of temperature is 135 ~ 155 DEG C, and control screw speed is 35 ~ 65r/min, extrusion, pelletize, obtains composite particles；
B, the composite particles hot pressing film forming on vulcanizing press step A obtained, controlling temperature is 120 ~ 140 DEG C, and pressure is 8 ~ 12MPa, and hot pressing time is 15 ~ 25min, obtains polyethylene/CoFe that thickness is 0.1 ~ 0.2mm2O4Nano compound film, is nanometer electrolyte.
The invention has the beneficial effects as follows: the present invention accurately controls undersized nano Co Fe of preparation2O4The particle diameter of powder, and select suitable coating material that its surface is modified so that it is Surface coating has and can have the specific functional groups of excellent compatibility with polyethylene, and this coating material may also operate as suppressing nm level CoFe simultaneously2O4Powder ball is polymerized to block, accurately control nm level CoFe2O4The effect in powder footpath, and then can have again nano Co Fe while improving the environmental aging hot, mechanical, fire-retardant, resistance to of LDPE matrix, dielectric properties by preparing nanocomposite dielectric by compound to itself and polyethylene to this nanocomposite dielectric2O4The paramagnetism of particle, this nanocomposite dielectric anisotropic properties can be given by externally-applied magnetic field, realize the regulation and control to its macro property.
The present invention is used for preparing and compound with polyethylene can prepare dielectric nano Co Fe of nanometer2O4Powder.
Accompanying drawing explanation
Fig. 1 is nano Co Fe of embodiment one preparation2O4The transmission electron microscope picture of powder；
Fig. 2 is this nano Co Fe obtained by Fig. 1 in embodiment one2O4Grain size distribution；
Fig. 3 is nano Co Fe of embodiment one preparation2O4The XRD spectra of powder；
Fig. 4 is nano Co Fe of embodiment one preparation2O4The room temperature magnetization curve figure of powder；
Fig. 5 is nano Co Fe of embodiment one preparation2O4Powder and polyethylene are combined the dielectric scanning electron microscope (SEM) photograph of nanometer of preparation.
Detailed description of the invention
Technical solution of the present invention is not limited to the detailed description of the invention of act set forth below, also includes the combination in any between each detailed description of the invention.
Detailed description of the invention one: present embodiment one can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4The preparation method of powder, specifically prepares according to following steps:
One, 9 ~ 11 parts of CoSO are weighed by weight4, 10 ~ 25 parts of FeCl3, 1 ~ 3 part of coating material and 25 ~ 40 parts of sodium stearates；
Two, the CoSO that step one is weighed4、FeCl3Mixed solution is obtained with in the mixed solution that sodium stearate is dissolved in distilled water and dehydrated alcohol, wherein, the volume ratio of distilled water and dehydrated alcohol is 1:1 ~ 3, then adds normal heptane in system, and normal heptane is 1 ~ 3:1 with the volume ratio of distilled water and dehydrated alcohol mixed liquor；
Three, under the conditions of magnetic agitation, mixed solution step 2 obtained is warming up to 70 ~ 100 DEG C, take off and after cooling stands, take upper liquid addition high temperature hydrothermal reaction kettle, add the coating material that step one weighs, react putting into constant temperature oven after airtight for reactor, oven temperature is 250 ~ 350 DEG C, is incubated 1 ~ 24h, obtains nano Co Fe2O4Precast body；
Four, nano Co Fe that step 3 is obtained2O4Precast body dehydrated alcohol, cleans 2 ~ 5 times, then through high speed centrifuge centrifugation, obtaining one can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4Powder, centrifuge speed is 6000 ~ 12000r/min, and centrifugation time is 5 ~ 20min, obtains nano Co Fe that particle diameter is 4 ~ 10nm2O4Powder.
Present embodiment accurately controls nano Co Fe of preparation2O4The particle diameter of powder, and select suitable coating material that its surface is modified so that it is Surface coating has and can have the specific functional groups of excellent compatibility with polyethylene, and this coating material may also operate as suppressing nm level CoFe simultaneously2O4Powder ball is polymerized to block, accurately control nm level CoFe2O4The effect in powder footpath, and then can have again nano Co Fe while improving the environmental aging hot, mechanical, fire-retardant, resistance to of LDPE matrix, dielectric properties by preparing nanocomposite dielectric by compound to itself and polyethylene to this nanocomposite dielectric2O4The paramagnetism of particle, this nanocomposite dielectric anisotropic properties can be given by externally-applied magnetic field, realize the regulation and control to its macro property.
Detailed description of the invention two: present embodiment is unlike detailed description of the invention one: in step one, coating material is stearic acid.Other is identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment is unlike detailed description of the invention one or two: in step 3, mixing speed is 200 ~ 500 r/min.Other is identical with detailed description of the invention one or two.
Detailed description of the invention four: present embodiment is unlike one of detailed description of the invention one to three: be warming up to 70 ~ 100 DEG C in step 3.Other is identical with one of detailed description of the invention one to three.
Detailed description of the invention five: present embodiment is unlike one of detailed description of the invention one to four: in step 3, hydrothermal temperature is 250 ~ 350 DEG C, the response time is 1 ~ 24h.Other is identical with one of detailed description of the invention one to four.
Detailed description of the invention six: present embodiment is unlike one of detailed description of the invention one to five: in step 4, centrifuge speed is 6000 ~ 12000r/min, centrifugation time is 5 ~ 20min.Other is identical with one of detailed description of the invention one to five.
Detailed description of the invention seven: present embodiment is unlike one of detailed description of the invention one to six: nano Co Fe in step 42O4The particle diameter of powder is 4 ~ 10nm.Other is identical with one of detailed description of the invention one to six.
Detailed description of the invention eight: the one that present embodiment utilizes detailed description of the invention one to prepare can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4The application of powder is this nano Co Fe2O4Powder and polyethylene compound preparation nanometer electrolyte.
Detailed description of the invention nine: present embodiment is this nano Co Fe unlike detailed description of the invention eight2O4Powder and the polyethylene compound preparation dielectric method of nanometer, specifically prepare according to following steps:
A, nano Co Fe prepared by claim 12O4Powder premixes with polyethylene, is subsequently adding in double screw extruder, and 0.5 ~ 1h is blended under the conditions of temperature is 135 ~ 155 DEG C, and control screw speed is 35 ~ 65r/min, extrusion, pelletize, obtains composite particles；
B, the composite particles hot pressing film forming on vulcanizing press step A obtained, controlling temperature is 120 DEG C ~ 140 DEG C, and pressure is 8 ~ 12MPa, and hot pressing time is 15 ~ 25min, obtains the LDPE/ CoFe that thickness is 0.1 ~ 0.2mm2O4Nano compound film, is nanometer electrolyte.Other is identical with detailed description of the invention eight.
Employing following example checking beneficial effects of the present invention:
Embodiment one:
The present embodiment one can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4The preparation method of powder, specifically prepares according to following steps:
One, 9 ~ 11 parts of CoSO are weighed by weight4, 10 ~ 25 parts of FeCl3, 1 ~ 3 part of coating material and 25 ~ 40 parts of sodium stearates；
Two, the CoSO that step one is weighed4、FeCl3Mixed solution is obtained with in the mixed solution that sodium stearate is dissolved in distilled water and dehydrated alcohol, wherein, the volume ratio of distilled water and dehydrated alcohol is 1:1 ~ 3, then adds normal heptane in system, and normal heptane is 1 ~ 3:1 with the volume ratio of distilled water and dehydrated alcohol mixed liquor；
Three, under the conditions of magnetic agitation, mixed solution step 2 obtained is warming up to 70 ~ 100 DEG C, take off and after cooling stands, take upper liquid addition high temperature hydrothermal reaction kettle, add the coating material that step one weighs, react putting into constant temperature oven after airtight for reactor, oven temperature is 250 ~ 350 DEG C, is incubated 1 ~ 24h, obtains nano Co Fe2O4Precast body；
Four, nano Co Fe that step 3 is obtained2O4Precast body dehydrated alcohol, cleans 2 ~ 5 times, then through high speed centrifuge centrifugation, obtaining one can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4Powder, centrifuge speed is 6000 ~ 12000r/min, and centrifugation time is 5 ~ 20min, obtains nano Co Fe that particle diameter is 4 ~ 10nm2O4Powder.In the present embodiment step one, coating material is stearic acid, and in step 3, mixing speed is 300r/min.
Above-mentioned nano Co Fe2O4Powder and the polyethylene compound preparation dielectric method of nanometer, specifically prepare according to following steps:
A, nano Co Fe prepared by claim 12O4Powder premixes with polyethylene, is subsequently adding in double screw extruder, and 0.5 ~ 1h is blended under the conditions of temperature is 135 ~ 155 DEG C, and control screw speed is 35 ~ 65r/min, extrusion, pelletize, obtains composite particles；
B, the composite particles hot pressing film forming on vulcanizing press step A obtained, controlling temperature is 120 ~ 140 DEG C, and pressure is 8 ~ 12MPa, and hot pressing time is 15 ~ 25min, obtains polyethylene/CoFe that thickness is 0.1 ~ 0.2mm2O4Nano compound film, is nanometer electrolyte.Wherein, polyethylene/CoFe2O4Nano Co Fe in nano compound film2O4The content of powder is 1wt%.
Nano Co Fe prepared by the present embodiment2O4The transmission electron microscope picture of powder is as it is shown in figure 1, the grain size distribution of its correspondence is as in figure 2 it is shown, nano Co Fe prepared of the present embodiment2O4The XRD spectra of powder is as it is shown on figure 3, nano Co Fe prepared of the present embodiment2O4The room temperature magnetization curve figure of powder as shown in Figure 4, nano Co Fe prepared by the present embodiment2O4Powder and polyethylene are combined the dielectric scanning electron microscope (SEM) photograph of nanometer of preparation as shown in Figure 5.
Jointly illustrated by the result of transmission electron microscope picture and XRD spectra, prepared nano Co Fe2O4Powder is nano Co Fe of inverse spinel structure2O4, mean diameter is 6.5nm；Magnetic is measured showing, this nano Co Fe2O4Powder, without remanent magnetism and coercivity, illustrates that it has superparamagnetism, and its saturation magnetization is 55.5emu/g, and the surface finish nano CoFe prepared with this coating material is described2O4Powder is ensureing nano Co Fe2O4The paramagnetic premise of particle diameter is issued to carry out it surface modification, introduce the active group good with the LDPE compatibility and accurately control nano Co Fe2O4Particle diameter (about 6.5nm), suppress its multipurpose reunited.
Claims (9)
1. compound with polyethylene can prepare dielectric nano Co Fe of nanometer for one kind2O4The preparation method of powder, it is characterised in that this nano Co Fe2O4The preparation method of powder, specifically prepares according to following steps:
One, 9 ~ 11 parts of CoSO are weighed by weight4, 10 ~ 25 parts of FeCl3, 1 ~ 3 part of coating material and 25 ~ 40 parts of sodium stearates；
Two, the CoSO that step one is weighed4、FeCl3Mixed solution is obtained with in the mixed solution that sodium stearate is dissolved in distilled water and dehydrated alcohol, wherein, the volume ratio of distilled water and dehydrated alcohol is 1:1 ~ 3, then adds normal heptane in system, and normal heptane is 1 ~ 3:1 with the volume ratio of distilled water and dehydrated alcohol mixed liquor；
Three, under agitation, mixed solution step 2 obtained is warming up to 70 ~ 100 DEG C, take off and after cooling stands, take upper liquid addition high temperature hydrothermal reaction kettle, add the coating material that step one weighs, react putting into constant temperature oven after airtight for reactor, oven temperature is 250 ~ 350 DEG C, is incubated 1 ~ 24h, obtains nano Co Fe2O4Precast body；
Four, nano Co Fe that step 3 is obtained2O4Precast body washes of absolute alcohol 2 ~ 5 times, then through high speed centrifuge centrifugation, obtaining one can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4Powder, centrifuge speed is 6000 ~ 12000r/min, and centrifugation time is 5 ~ 20min, obtains nano Co Fe that particle diameter is 4 ~ 10nm2O4Powder.
One the most according to claim 1 can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4The preparation method of powder, it is characterised in that in step one, coating material is stearic acid.
One the most according to claim 2 can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4The preparation method of powder, it is characterised in that in step 3, mixing speed is 200 ~ 500 r/min.
One the most according to claim 3 can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4The preparation method of powder, it is characterised in that be warming up to 70 ~ 100 DEG C in step 3.
One the most according to claim 4 can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4The preparation method of powder, it is characterised in that in step 3, hydrothermal temperature is 250 ~ 350 DEG C, the response time is 1 ~ 24h.
One the most according to claim 5 can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4The preparation method of powder, it is characterised in that in step 4, centrifuge speed is 6000 ~ 12000r/min, centrifugation time is 5 ~ 20min.
One the most according to claim 5 can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4The preparation method of powder, it is characterised in that nano Co Fe in step 42O4The particle diameter of powder is 4 ~ 10nm.
8. utilizing claim 1 to prepare one can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4The application of powder, it is characterised in that this nano Co Fe2O4Powder can be with polyethylene compound preparation nanometer electrolyte.
One the most according to claim 8 can be with polyethylene compound preparation dielectric nano Co Fe of nanometer2O4The application of powder, it is characterised in that this nano Co Fe2O4Powder and the polyethylene compound preparation dielectric method of nanometer, specifically prepare according to following steps:
A, nano Co Fe prepared by claim 12O4Powder premixes with polyethylene, is subsequently adding in double screw extruder, and 0.5 ~ 1h is blended under the conditions of temperature is 135 ~ 155 DEG C, and control screw speed is 35 ~ 65r/min, extrusion, pelletize, obtains composite particles；
B, the composite particles hot pressing film forming on vulcanizing press step A obtained, controlling temperature is 120 ~ 140 DEG C, and pressure is 8 ~ 12MPa, and hot pressing time is 15 ~ 25min, obtains polyethylene/CoFe that thickness is 0.1 ~ 0.2mm2O4Nano compound film, is nanometer electrolyte.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114906877A (en) * | 2022-04-01 | 2022-08-16 | 哈尔滨理工大学 | Preparation method of cobalt ferrite capable of being compounded with LDPE (Low-Density polyethylene) to prepare magnetic nano dielectric medium |
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| CN101244844A (en) * | 2007-02-14 | 2008-08-20 | 中国科学院金属研究所 | Method for manufacturing nano-ferrous acid in supercritical water |
| WO2009045177A1 (en) * | 2007-10-05 | 2009-04-09 | Agency For Science, Technology And Research | Methods of forming a nanocrystal |
| CN104150540A (en) * | 2014-07-14 | 2014-11-19 | 河南大学 | Heavy metal ion adsorbent ferrite hollow spheres MFe2O4 |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101244844A (en) * | 2007-02-14 | 2008-08-20 | 中国科学院金属研究所 | Method for manufacturing nano-ferrous acid in supercritical water |
| WO2009045177A1 (en) * | 2007-10-05 | 2009-04-09 | Agency For Science, Technology And Research | Methods of forming a nanocrystal |
| CN104150540A (en) * | 2014-07-14 | 2014-11-19 | 河南大学 | Heavy metal ion adsorbent ferrite hollow spheres MFe2O4 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114906877A (en) * | 2022-04-01 | 2022-08-16 | 哈尔滨理工大学 | Preparation method of cobalt ferrite capable of being compounded with LDPE (Low-Density polyethylene) to prepare magnetic nano dielectric medium |
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Application publication date: 20170104 |