CN108597713A - A kind of preparation method of magnetic material - Google Patents
A kind of preparation method of magnetic material Download PDFInfo
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- CN108597713A CN108597713A CN201810595962.4A CN201810595962A CN108597713A CN 108597713 A CN108597713 A CN 108597713A CN 201810595962 A CN201810595962 A CN 201810595962A CN 108597713 A CN108597713 A CN 108597713A
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14708—Fe-Ni based alloys
- H01F1/14716—Fe-Ni based alloys in the form of sheets
- H01F1/14725—Fe-Ni based alloys in the form of sheets with insulating coating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/0036—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties showing low dimensional magnetism, i.e. spin rearrangements due to a restriction of dimensions, e.g. showing giant magnetoresistivity
- H01F1/0045—Zero dimensional, e.g. nanoparticles, soft nanoparticles for medical/biological use
- H01F1/0054—Coated nanoparticles, e.g. nanoparticles coated with organic surfactant
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14708—Fe-Ni based alloys
- H01F1/14733—Fe-Ni based alloys in the form of particles
- H01F1/14741—Fe-Ni based alloys in the form of particles pressed, sintered or bonded together
- H01F1/1475—Fe-Ni based alloys in the form of particles pressed, sintered or bonded together the particles being insulated
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14766—Fe-Si based alloys
- H01F1/14775—Fe-Si based alloys in the form of sheets
- H01F1/14783—Fe-Si based alloys in the form of sheets with insulating coating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14766—Fe-Si based alloys
- H01F1/14791—Fe-Si-Al based alloys, e.g. Sendust
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15333—Amorphous metallic alloys, e.g. glassy metals containing nanocrystallites, e.g. obtained by annealing
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- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15341—Preparation processes therefor
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15358—Making agglomerates therefrom, e.g. by pressing
- H01F1/15366—Making agglomerates therefrom, e.g. by pressing using a binder
- H01F1/15375—Making agglomerates therefrom, e.g. by pressing using a binder using polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
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- Engineering & Computer Science (AREA)
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- Power Engineering (AREA)
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- Electromagnetism (AREA)
- Dispersion Chemistry (AREA)
- Nanotechnology (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Crystallography & Structural Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
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- Soft Magnetic Materials (AREA)
Abstract
The present invention relates to a kind of preparation method of soft-magnetic composite material, the specific steps are：Raw material is made of sheet magnetically soft alloy, dielectric, solvent, dispersant and bonding agent；By magnetically soft alloy, dielectric, solvent, 5 ~ 30 h of dispersant ball milling；Bonding agent is then added, continues 0.5~10h of ball milling, vacuum outgas obtains disperse slurry；Disperse slurry is injected in casting machine, the height of scraper is 10 ~ 500 μm, and control casting machine speed is 0.5~5cm/s；20~30 DEG C of drying temperature, relative humidity are 30~60%, obtain the casting belt of dried flat；Casting belt after drying is subjected to composite laminate compacting, then after cutting at the compound magnet ring of various sizes of soft magnetism；Sheet magnetic powder is arranged in parallel along anchor ring in the magnet ring of acquisition, has high magnetic permeability.It is an advantage of the invention that：Without alignment magnetic field, use the tape casting that can effectively improve composite material magnetic conductivity with the laminated structure for preparing ordered arrangement of continuous high-efficient.
Description
Technical field
The present invention relates to a kind of preparation methods of soft-magnetic composite material, belong to field of magnetic material preparation.
Background technology
Soft magnetic materials is the magnetic material for having low-coercivity and high magnetic permeability, be widely used in electric power, information, the energy,
The fields such as traffic and national defence are important functional material and the key foundation material of national economy.With electric power and electronics
Increasingly miniaturization, lightweight, high frequency, integrated, the demand of soft magnetic materials is increasing, and soft magnetic materials is also towards high magnetic conductance
Rate, high-frequency, low-loss direction are developed.Metal soft magnetic material saturation flux density, magnetic conductivity are high, can meet miniaturization
Demand, but resistivity is low, and high frequency eddy current losses are big, therefore are usually used under power frequency；Ferrite is ferrimagnetic material, saturation
Magnetic flux density is low, work when energy conversion efficiency it is low, but resistivity is high, high-frequency loss is low, therefore usually in high frequency（MHz~GHz）
It uses.Soft-magnetic composite material combines the advantages of metal soft magnetic material and soft magnetic ferrite：Main phase is magnetically soft alloy, saturation flux
Density is high, energy conversion efficiency is high；Interfacial insulator layer has high resistance, high-frequency loss low.Therefore soft-magnetic composite material has height
Magnetic flux and low-loss feature, can meet high frequency simultaneously（kHz~MHz）Use the demand minimized with volume.
Domestic many colleges and universities, scientific research institutions and manufacturing enterprise have all carried out the research of soft-magnetic composite material, focus collection
In in the design of magnetic phase constituent, interfacial insulator cladding and Magnet Technology optimize three aspects, to improve magnetic property, it is close to improve magnetic flux
Degree, magnetic conductivity and magnetic loss characteristic.First, magnetic phase constituent design passes through addition element mainly from magnetically soft alloy itself
Improve the characteristics such as magnetic conductivity, coercivity and the resistivity of alloy.Secondly, interfacial insulator cladding is the research weight of soft-magnetic composite material
Point improves resistivity, reduces eddy-current loss by being fully dielectrically separated to soft magnetic granules；Good clad answer thickness thin with
Ensure high magnetic permeability, structural integrity is to ensure sufficient insulating wrapped；Insulating coating material both can be inorganic matter（Glass powder,
Waterglass, MgO, SiO2And Al2O3Deng）, organic matter（Epoxy resin, phenolic resin and organosilicon etc.）, or organic-inorganic
Compound coating.Again, process optimization is mainly adjusted by preparation parameter, optimizes material microstructure, promotes magnetic property.
Though soft-magnetic composite material magnetic property is constantly promoted, self structure causes permeability low.Based on two factors：
One, alloying pellet is separated by non magnetic insulating layer, and magnetic circuit partition, magnetic resistance are high；Two, non magnetic interface leads to alloy in magnetic history
Occurs free pole in particle, local demagnetizing field is big.High magnetic resistance and the collective effect of local demagnetization field-effect cause magnetic conductivity to drop
Low, magnetic hystersis loss increases.Magnetic resistance is directly related with non magnetic insulating layer overall thickness in magnetic circuit, and demagnetizing field is by alloying pellet shape
It determines, therefore the low magnetic permeability of soft-magnetic composite material is necessarily caused by self structure.How by optimizing tissue structure with
Local demagnetizing field and magnetic resistance are reduced, is to promote permeability to drop low-loss key.
Chinese patent 2012104332238 makes magnetic-particle form chain cluster along magnetic direction using magnetic field, is obtained
Obtain Unidirectional transparent characteristic；Chinese patent 2009101405358,2016110014476,2016110015356,
2016110017173 using sheet magnetically soft alloy or ferrite, magnetic field orientating obtains composite wood in polymer or paraffin matrix
Material, ordered orientation structure has certain optimization to the magnetic conductivity of material or loss, but non-magnetic phase content is still excessively high in matrix, magnetic
The disadvantage that conductance is low, high-frequency loss is high still improves without essence.
For the low common problem of soft-magnetic composite material magnetic conductivity, the present invention makes sheet magnetic powder along magnet ring using casting technique
Plane（Work magnetic circuit direction）Parallel ordered arrangement, the final soft-magnetic composite material for obtaining high magnetic permeability.
Invention content
The purpose of the present invention is to provide a kind of preparation methods of soft-magnetic composite material.
The present invention designs a kind of new structure soft-magnetic composite material：Magnetically soft alloy particle is laminated structure, all sheets
Grain is all along magnet ring plane（Work magnetic circuit direction）Parallel ordered arrangement；This structure soft-magnetic composite material is prepared using the tape casting,
To improve composite material magnetic conductivity.
Magnetic circuit when soft-magnetic composite material works is along one week closed loop of magnet ring.The demagnetizing factor of spheric granules any direction
Be 1/3, and sheet-like particle is almost nil along in-plane demagnetizing factor, thus in face magnetized sheet-like particle local demagnetizing field
Far below spheric granules；If non-magnetic gap of the sheet magnetic powder in the parallel orderly distribution in magnet ring face, magnetic circuit is much smaller than same
The magnet ring that the spheric granules of volume is constituted.Therefore, sheet alloy can effectively reduce local demagnetizing field and magnetic circuit reluctance, improve magnetic conductance
Rate.Soft-magnetic composite material working frequency magnetic loss mainly based on magnetic hystersis loss and eddy-current loss.Sheet alloy is along plane
Direction easy magnetization, magnetic conductivity is high, and magnetic hystersis loss is low；Laminated structure can effectively reduce the influence of Kelvin effect simultaneously, reduce vortex
Loss.Therefore, laminated structure can reduce magnetic loss in terms of magnetic hystersis loss and eddy-current loss two.It is non-in soft-magnetic composite material
Though magnetic insulating layer improves resistivity, magnetically soft alloy content is reduced, sacrifices part magnetic property.Using magnetic oxide
As insulating layer, insulating layer magnetic conductivity can be improved, reduce magnetic resistance, improve composite material magnetic conductivity, reduce magnetic hystersis loss.
The tape casting molding refers to adding the ingredients such as people's solvent, dispersant, binder, plasticizer in powder, is uniformly divided
A kind of forming method for requiring thickness thin film is made in scattered stabilization slurry on casting machine.Since the method is simple with equipment, can
It operates continuously, production efficiency is high, automatization level height, process stabilizing, the repeatability of molding blank performance and size consistency
It is higher, the first-class series of advantages of body crack defects.
The preparation method of soft-magnetic composite material according to the present invention is：
1）Raw material prepare
Magnetic main phase is sheet soft-magnetic alloy powder；
Other components include：Dielectric, solvent, dispersant and bonding agent；
The sheet soft-magnetic alloy powder includes：Fe, Fe-Si, Fe-Ni, Fe-Ni-Mo, Fe-Si-Al, amorphous nano-crystalline close
Gold；
The sheet soft-magnetic alloy powder preferably uses ball-milling method to prepare；
The sheet soft-magnetic alloy powder thickness is 1 ~ 10 μm；
A diameter of 40 ~ 500 μm of the sheet soft-magnetic alloy powder；
The dielectric includes：Glass powder, waterglass, MgO, SiO2And Al2O3；
The solvent includes：Water, ethyl alcohol, methyl ethyl ketone, trichloro ethylene, toluene and dimethylbenzene；
The dispersant includes：Polyacrylic acid, polymethylacrylic acid, phosphate, olein and herring oil；
The bonding agent includes：PVA, acrylic emulsion, ammonium polyacrylate salt, polyvinyl acetate, PVB, polyacrylic acid first
Ester, ethyl cellulose and polymethylacrylic acid；
2）The preparation of slurry
Sheet soft-magnetic alloy powder and dielectric, 5 ~ 30 h of solvent, dispersant and bonding agent mixing and ball milling are prepared low viscous
The slurry of degree, high solid fractions；Bonding agent is then added, continues 0.5~10h of ball milling, vacuum outgas obtains disperse slurry；
Wherein dielectric content is the wt.% of 0.5 wt.% ~ 3 of magnetically soft alloy；
The dispersant is the wt.% of 0.1 wt.% ~ 5 of solvent；
The bonding agent content is the wt.% of 0.3 wt.% ~ 3 of solvent；
Solid volume fraction is the vol.% of 50 vol.% ~ 90 in the slurry；
3）Tape casting
Disperse slurry is injected in casting machine, the height of scraper is 10 ~ 500 μm, and control casting machine speed is 0.5~5cm/s；
It controls scraper height and is less than sheet magnetically soft alloy disc diameter, make sheet magnetically soft alloy in the common work of scraper and slurry rheological force
With the parallel curtain coating directional spreding of lower disc；
4）Green compact are dried
20~30 DEG C of drying temperature, relative humidity are 30~60%, obtain the casting belt of dried flat；
5）Lamination compacting, excision forming
Casting belt after drying is subjected to composite laminate compacting, then after cutting at the compound magnet ring of various sizes of soft magnetism；It obtains
Magnet ring in sheet magnetic powder it is arranged in parallel along anchor ring, have high magnetic permeability.
It is an advantage of the invention that：
1, sheet-like particle is all along magnet ring plane（Work magnetic circuit direction）Parallel ordered arrangement reduces the magnetic circuit of magnet ring operative orientation
Magnetic resistance and demagnetizing field improve magnet ring magnetic conductivity；
2, the tape casting can be not necessarily to magnetic with the preparation sheet magnetic powder of continuous high-efficient along the parallel-oriented soft-magnetic composite material in curtain coating direction
Field can be obtained height-oriented.
Specific implementation mode
With reference to embodiment, the present invention will be described in detail, so as to more fully understand the purpose of the present invention, feature and
Advantage.Although the present invention is described in conjunction with the specific embodiment, it is not intended that the invention be limited to described
Specific embodiment.On the contrary, to may include that the embodiment in the protection domain defined in the claims in the present invention carries out
Replacement, improvement and equivalent embodiment, belong to protection scope of the present invention.For the technological parameter not marked especially,
It can routinely technology carry out.
Embodiment 1：
1）Raw material prepare
Magnetic main phase is sheet Fe powder；
Powder is prepared using ball-milling method；
Powder thickness is 1 μm, a diameter of 40 μm；
Other components include：Dielectric, solvent, dispersant and bonding agent；
Dielectric is：Glass powder；
Solvent is：Water；
Dispersant is：Polyacrylic acid；
Bonding agent is：PVA；
2）The preparation of slurry
Sheet soft-magnetic alloy powder and dielectric, 5 h of solvent, dispersant and bonding agent mixing and ball milling, prepare low viscosity, height
The slurry of fraction solid；Bonding agent is then added, continues ball milling 0.5h, vacuum outgas obtains disperse slurry；
Wherein dielectric content is 0.5 wt.% of magnetically soft alloy；
Dispersant is 0.1 wt.% of solvent；
It is bonded 0.3 wt.% that agent content is solvent；
Solid volume fraction is 50 vol.% in slurry；
3）Tape casting
Disperse slurry is injected in casting machine, the height of scraper is 10 μm, and control casting machine speed is 0.5cm/s；
4）Green compact are dried
20 DEG C of drying temperature, relative humidity 30% obtain the casting belt of dried flat；
5）Lamination compacting, excision forming
Casting belt after drying is subjected to composite laminate compacting, then after cutting at the compound magnet ring of various sizes of soft magnetism；It obtains
Magnet ring in sheet magnetic powder it is arranged in parallel along anchor ring, have high magnetic permeability.
Embodiment 2：
1）Raw material prepare
Magnetic main phase is sheet Fe-Si powder；
Powder is prepared using ball-milling method；
Powder thickness is 2 μm, a diameter of 60 μm；
Other components include：Dielectric, solvent, dispersant and bonding agent；
Dielectric is：Waterglass；
Solvent is：Water；
Dispersant is：Polymethylacrylic acid；
Bonding agent is：Acrylic emulsion；
2）The preparation of slurry
Sheet soft-magnetic alloy powder and dielectric, 8 h of solvent, dispersant and bonding agent mixing and ball milling, prepare low viscosity, height
The slurry of fraction solid；Bonding agent is then added, continues ball milling 1h, vacuum outgas obtains disperse slurry；
Wherein dielectric content is 0.8 wt.% of magnetically soft alloy；
Dispersant is 0.5 wt.% of solvent；
It is bonded 0.5 wt.% that agent content is solvent；
Solid volume fraction is 50 vol.% in slurry；
3）Tape casting
Disperse slurry is injected in casting machine, the height of scraper is 20 μm, and control casting machine speed is 0.8cm/s；
4）Green compact are dried
20 DEG C of drying temperature, relative humidity 40% obtain the casting belt of dried flat；
5）Lamination compacting, excision forming
Casting belt after drying is subjected to composite laminate compacting, then after cutting at the compound magnet ring of various sizes of soft magnetism；It obtains
Magnet ring in sheet magnetic powder it is arranged in parallel along anchor ring, have high magnetic permeability.
Embodiment 3：
1）Raw material prepare
Magnetic main phase is sheet Fe-Ni powder；
Powder is prepared using ball-milling method；
Powder thickness is 4 μm, a diameter of 100 μm；
Other components include：Dielectric, solvent, dispersant and bonding agent；
Dielectric is： MgO；
Solvent is：Ethyl alcohol；
Dispersant is：Herring oil；
Bonding agent is：Polyvinyl acetate；
2）The preparation of slurry
Sheet soft-magnetic alloy powder and dielectric, 10 h of solvent, dispersant and bonding agent mixing and ball milling, prepare low viscosity,
The slurry of high solid fractions；Bonding agent is then added, continues ball milling 2h, vacuum outgas obtains disperse slurry；
Wherein dielectric content is 1.0 wt.% of magnetically soft alloy；
Dispersant is 1 wt.% of solvent；
It is bonded 0.8 wt.% that agent content is solvent；
Solid volume fraction is 55 vol.% in slurry；
3）Tape casting
Disperse slurry is injected in casting machine, the height of scraper is 40 μm, and control casting machine speed is 1cm/s；
4）Green compact are dried
25 DEG C of drying temperature, relative humidity 50% obtain the casting belt of dried flat；
5）Lamination compacting, excision forming
Casting belt after drying is subjected to composite laminate compacting, then after cutting at the compound magnet ring of various sizes of soft magnetism；It obtains
Magnet ring in sheet magnetic powder it is arranged in parallel along anchor ring, have high magnetic permeability.
Embodiment 4：
1）Raw material prepare
Magnetic main phase is sheet Fe-Ni-Mo powder；
Powder is prepared using ball-milling method；
Powder thickness is 5 μm, a diameter of 200 μm；
Other components include：Dielectric, solvent, dispersant and bonding agent；
Dielectric is：SiO2；
Solvent is：Methyl ethyl ketone；
Dispersant is：Olein；
Bonding agent is： PVB；
2）The preparation of slurry
Sheet soft-magnetic alloy powder and dielectric, 15 h of solvent, dispersant and bonding agent mixing and ball milling, prepare low viscosity,
The slurry of high solid fractions；Bonding agent is then added, continues ball milling 4h, vacuum outgas obtains disperse slurry；
Wherein dielectric content is 1.2 wt.% of magnetically soft alloy；
Dispersant is 1.5 wt.% of solvent；
It is bonded 1.2 wt.% that agent content is solvent；
Solid volume fraction is 60 vol.% in slurry；
3）Tape casting
Disperse slurry is injected in casting machine, the height of scraper is 60 μm, and control casting machine speed is 2cm/s；
4）Green compact are dried
30 DEG C of drying temperature, relative humidity 60% obtain the casting belt of dried flat；
5）Lamination compacting, excision forming
Casting belt after drying is subjected to composite laminate compacting, then after cutting at the compound magnet ring of various sizes of soft magnetism；It obtains
Magnet ring in sheet magnetic powder it is arranged in parallel along anchor ring, have high magnetic permeability.
Embodiment 5：
1）Raw material prepare
Magnetic main phase is sheet Fe-Si-Al powder；
Powder is prepared using ball-milling method；
Powder thickness is 6 μm, a diameter of 300 μm；
Other components include：Dielectric, solvent, dispersant and bonding agent；
Dielectric is：Al2O3；
Solvent is：Trichloro ethylene；
Dispersant is：Phosphate；
Bonding agent is：Polymethyl acrylate；
2）The preparation of slurry
Sheet soft-magnetic alloy powder and dielectric, 20 h of solvent, dispersant and bonding agent mixing and ball milling, prepare low viscosity,
The slurry of high solid fractions；Bonding agent is then added, continues ball milling 6h, vacuum outgas obtains disperse slurry；
Wherein dielectric content is 1.5 wt.% of magnetically soft alloy；
Dispersant is 2 wt.% of solvent；
It is bonded 1.5 wt.% that agent content is solvent；
Solid volume fraction is 70 vol.% in slurry；
3）Tape casting
Disperse slurry is injected in casting machine, the height of scraper is 10 μm, and control casting machine speed is 3cm/s；
4）Green compact are dried
20 DEG C of drying temperature, relative humidity 60% obtain the casting belt of dried flat；
5）Lamination compacting, excision forming
Casting belt after drying is subjected to composite laminate compacting, then after cutting at the compound magnet ring of various sizes of soft magnetism；It obtains
Magnet ring in sheet magnetic powder it is arranged in parallel along anchor ring, have high magnetic permeability.
Embodiment 6：
1）Raw material prepare
Magnetic main phase is sheet amorphous powder；
Powder is prepared using ball-milling method；
Powder thickness is 8 μm, a diameter of 400 μm；
Other components include：Dielectric, solvent, dispersant and bonding agent；
Dielectric is：SiO2；
Solvent is：Toluene；
Dispersant is：Olein；
Bonding agent is：Ethyl cellulose；
2）The preparation of slurry
Sheet soft-magnetic alloy powder and dielectric, 25 h of solvent, dispersant and bonding agent mixing and ball milling, prepare low viscosity,
The slurry of high solid fractions；Bonding agent is then added, continues ball milling 8h, vacuum outgas obtains disperse slurry；
Wherein dielectric content is 2 wt.% of magnetically soft alloy；
Dispersant is 3 wt.% of solvent；
It is bonded 2 wt.% that agent content is solvent；
Solid volume fraction is 80 vol.% in slurry；
3）Tape casting
Disperse slurry is injected in casting machine, the height of scraper is 200 μm, and control casting machine speed is 4cm/s；
4）Green compact are dried
30 DEG C of drying temperature, relative humidity 50% obtain the casting belt of dried flat；
5）Lamination compacting, excision forming
Casting belt after drying is subjected to composite laminate compacting, then after cutting at the compound magnet ring of various sizes of soft magnetism；It obtains
Magnet ring in sheet magnetic powder it is arranged in parallel along anchor ring, have high magnetic permeability.
Embodiment 7：
1）Raw material prepare
Magnetic main phase is flaky nanocrystalline powder；
Powder is prepared using ball-milling method；
Powder thickness is 10 μm, a diameter of 500 μm；
Other components include：Dielectric, solvent, dispersant and bonding agent；
Dielectric is：SiO2；
Solvent is：Dimethylbenzene；
Dispersant is：Herring oil；
Bonding agent is：Polymethylacrylic acid；
2）The preparation of slurry
Sheet soft-magnetic alloy powder and dielectric, 30 h of solvent, dispersant and bonding agent mixing and ball milling, prepare low viscosity,
The slurry of high solid fractions；Bonding agent is then added, continues ball milling 10h, vacuum outgas obtains disperse slurry；
Wherein dielectric content is 3 wt.% of magnetically soft alloy；
Dispersant is 5 wt.% of solvent；
It is bonded 3 wt.% that agent content is solvent；
Solid volume fraction is 90 vol.% in slurry；
3）Tape casting
Disperse slurry is injected in casting machine, the height of scraper is 500 μm, and control casting machine speed is 5cm/s；
4）Green compact are dried
25 DEG C of drying temperature, relative humidity 60% obtain the casting belt of dried flat；
5）Lamination compacting, excision forming
Casting belt after drying is subjected to composite laminate compacting, then after cutting at the compound magnet ring of various sizes of soft magnetism；It obtains
Magnet ring in sheet magnetic powder it is arranged in parallel along anchor ring, have high magnetic permeability.
Claims (1)
1. a kind of preparation method of soft-magnetic composite material, it is characterised in that the specific steps are：
1）Raw material prepare
Magnetic main phase is sheet soft-magnetic alloy powder；
Other components include：Dielectric, solvent, dispersant and bonding agent；
The sheet soft-magnetic alloy powder includes：Fe, Fe-Si, Fe-Ni, Fe-Ni-Mo, Fe-Si-Al, amorphous nano-crystalline close
Gold；
The sheet soft-magnetic alloy powder preferably uses ball-milling method to prepare；
The sheet soft-magnetic alloy powder thickness is 1 ~ 10 μm；
A diameter of 40 ~ 500 μm of the sheet soft-magnetic alloy powder；
The dielectric includes：Glass powder, waterglass, MgO, SiO2And Al2O3；
The solvent includes：Water, ethyl alcohol, methyl ethyl ketone, trichloro ethylene, toluene and dimethylbenzene；
The dispersant includes：Polyacrylic acid, polymethylacrylic acid, phosphate, olein and herring oil；
The bonding agent includes：PVA, acrylic emulsion, ammonium polyacrylate salt, polyvinyl acetate, PVB, polyacrylic acid first
Ester, ethyl cellulose and polymethylacrylic acid；
2）The preparation of slurry
Sheet soft-magnetic alloy powder and dielectric, 5 ~ 30 h of solvent, dispersant and bonding agent mixing and ball milling are prepared low viscous
The slurry of degree, high solid fractions；Bonding agent is then added, continues 0.5~10h of ball milling, vacuum outgas obtains disperse slurry；
Wherein dielectric content is the wt.% of 0.5 wt.% ~ 3 of magnetically soft alloy；
The dispersant is the wt.% of 0.1 wt.% ~ 5 of solvent；
The bonding agent content is the wt.% of 0.3 wt.% ~ 3 of solvent；
Solid volume fraction is the vol.% of 50 vol.% ~ 90 in the slurry；
3）Tape casting
Disperse slurry is injected in casting machine, the height of scraper is 10 ~ 500 μm, and control casting machine speed is 0.5~5cm/s；
4）Green compact are dried
20~30 DEG C of drying temperature, relative humidity are 30~60%, obtain the casting belt of dried flat；
5）Lamination compacting, excision forming
Casting belt after drying is subjected to composite laminate compacting, then after cutting at the compound magnet ring of various sizes of soft magnetism；It obtains
Magnet ring in sheet magnetic powder it is arranged in parallel along anchor ring, have high magnetic permeability.
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| CN110853910A (en) * | 2019-11-28 | 2020-02-28 | 中国计量大学 | Preparation method of high-permeability low-loss soft magnetic composite material and magnetic ring thereof |
| CN111704453A (en) * | 2020-07-15 | 2020-09-25 | 广东泛瑞新材料有限公司 | Nickel-zinc ferrite granule and preparation method thereof |
| CN113771274A (en) * | 2021-11-10 | 2021-12-10 | 成都佳驰电子科技股份有限公司 | Low-cost magnetic wave-absorbing waterproof gasket preparation device and method |
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