CN106531391A - Soft magnetic powder composition and manufacturing method for magnetic element - Google Patents
Soft magnetic powder composition and manufacturing method for magnetic element Download PDFInfo
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- CN106531391A CN106531391A CN201510572499.8A CN201510572499A CN106531391A CN 106531391 A CN106531391 A CN 106531391A CN 201510572499 A CN201510572499 A CN 201510572499A CN 106531391 A CN106531391 A CN 106531391A
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Abstract
The invention discloses a soft magnetic powder composition and a manufacturing method for a magnetic element. The manufacturing method for the magnetic element comprises the steps of performing mixing on the soft magnetic powder composition to form a mixing object, coating a base material with the mixing object, and cooling the mixing object, wherein the soft magnetic powder composition comprises the following components (based on weight percentage): (A) 80-93% of magnetic material which comprises at least one kind of iron-silicon-aluminum-containing magnetic alloy powder, Ni-Zn ferrite powder and Mn-Zn ferrite powder; and (B) 7-20% of high polymer material. The soft magnetic powder composition provided by the invention can be fully cured at a normal temperature or a medium and low temperature, so that high-temperature sintering treatment in the forming process is not required; in addition, the magnetic element prepared by the method provided by the invention has the advantages of enough flexibility mechanical strength, maximum magnetic conductivity and magnetic flux density (induction) and the like; and meanwhile, an eddy current can be kept at a low level, and minimum magnetic hysteresis loss can be achieved.
Description
Technical field
The present invention relates to a kind of ferrimagnetic iron material, particularly relate to one kind can carry out normal temperature or in it is low
The soft magnetic powder composition of the lower solidification of temperature, and using the magnetic of the soft magnetic powder composition
The preparation method of property element.
Background technology
With the development of science and technology, electronic product just develops towards miniaturization, high output, while
The frequency range used by the device such as mobile phone or computer just in high frequency, has reached GHz's at present
Specification.The magnetic element being accompanied by this must possess and expand the high permeability, low in frequency range
The characteristics such as core loss, high saturation induction and high mechanical properties.
There are soft magnetic metal material and Ferrite Material as the main material of above-mentioned magnetic element,
For soft magnetic metal material, although its saturation flux density is higher than Ferrite Material, but
Be its there are problems that consume is high, price is high, proportion is high in use, and rust-preventing characteristic；Just
For Ferrite Material, its not only price it is relatively low, and with several 10kHz to several 100kHz
Frequency band in the relatively low advantage of consume.
What deserves to be explained is, Ferrite Material is (such as：Powder) typically first pass through it is compressing after
High temperature sintering to be to form magnetic element again, in other words, the preparation method of existing magnetic element
Certainly will need to overcome the sintering sex chromosome mosaicism of Ferrite Material, curing condition also be strictly controlled,
To prevent the reduction of agglutinating property, the low frequency of the reduction of magnetic conductivity and frequency characteristic, dielectric constant
Reduction；And the sclerous reaction based on the complex ferrite composition of Ferrite Material must be in height
Warm lower section be enough to completely.
The content of the invention
The technical problem to be solved is for the deficiencies in the prior art, there is provided a kind of
Can under conditions of relative loose curing molding soft magnetic powder composition.
It is that, up to above-mentioned purpose, the present invention adopts following technological means：A kind of soft magnetic powder combination
Thing, comprising consisting of composition (by weight percentage)：(A) 80% to 93% magnetic material
Material, which includes alsifer powder, Ni-Zn ferrite powders and Mn-Zn iron oxygen
At least one among body powder；And the macromolecular material of (B) 7% to 20%.
It is another object of the present invention to provide a kind of preparation method of magnetic element, which has
High operating efficiency, the miniaturization demand for meeting various elements and needed for can producing in an automated manner
Magnetic element.
It is that, up to above-mentioned purpose, the present invention adopts following technological means：A kind of making of magnetic element
Method, comprises the following steps：First, above-mentioned soft magnetic powder composition is kneaded, to be formed
One mixing thing；Then, the coating mixing thing is on a base material；Finally, cool down the mixing
Thing.
In other words, the present invention provides a kind of soft magnetic powder composition, the soft magnetic powder
Composition includes consisting of composition (by weight percentage)：(A) 80% to 93% magnetic
Material, which includes alsifer powder, Ni-Zn ferrite powders and Mn-Zn iron
At least one among ferrite powder；And the macromolecular material of (B) 7% to 20%.
The magnetic material of composition (A) includes 85% to 90% sheet alsifer powder
End, the macromolecular material of composition (B) is comprising 10% to 15% thermoplastic resin.
10% to 15% thermoplastic resin is ethylene-vinyl acetate resin (EVA).
Or, the magnetic material of composition (A) is comprising 85% to 88% Mn-Zn ferrite powders
End and 2% to 5% alsifer powder, the macromolecular material of composition (B) is thermoplastic
Property resin.
85% to the 88% Mn-Zn ferrite powders are all spherical Mn-Zn ferrite powders
End, and 2% to the 5% alsifer powder includes 1% to 3% sheet iron silicon
Aluminium magnetic alloy powder, 0.5% to 1% irregular or spherical alsifer powder and
0.5% to 1% needle-like alsifer powder, and the thermoplastic resin is ethene-vinegar
Vinyl acetate resin (EVA).
Or, the magnetic material of composition (A) is comprising 85% to 88% Ni-Zn ferrite powders
End and 2% to 5% alsifer powder, the macromolecular material of composition (B) is thermoplastic
Property resin.
85% to the 88% Ni-Zn ferrite powders are all spherical Ni-Zn ferrite powders,
And 2% to the 5% alsifer powder includes 1% to 3% sheet iron sial magnetic
Property alloy powder, 0.5% to 1% irregular or spherical alsifer powder and 0.5%
To 1% needle-like alsifer powder, and the thermoplastic resin is ethene-vinyl acetate
Ester resin (EVA).
Or, the magnetic material of composition (A) is comprising 80% to 88% sheet iron sial magnetic
Alloy powder, the macromolecular material of composition (B) is comprising 10% to 15% thermosetting resin.
The soft magnetic powder composition further additive comprising composition (C) 2% to 5%,
Solvent which includes 0.5% to 1%, 0.3% to 1% curing agent, 0.1% to 0.5% coupling
Agent, 0.3% to 0.5% levelling agent and 0.3% to 0.5% defoamer, 0.4% to 1.3%
Plasticizer and 0.1% to 0.2 accelerator.
The solvent be cyclohexanone, the curing agent be dicyandiamide (DICY), the couplant
For siloxanes couplant, the levelling agent is the mixture of organosilicon and cyclohexanone, the froth breaking
Agent is the mixture of organosilicon and polymer, and the thermosetting resin is end carboxyl nitrile (HTBN)
Rubber (CTBN) modified epoxy, the plasticizer be diethyl oxalate ester, glycerine, three
Ethylene glycol, fourth (base)-(base) butyl phthalate, butyl phthalate (DBP),
Polyethylene glycol (PEG), trietbhlene glycol hexane, octyl phthalate (DDP), fourth (base)
- (base) phthalic acid ester or dioctyl phthalate.
The present invention also provides a kind of preparation method of magnetic element, comprises the following steps：Mixing is such as
Upper described soft magnetic powder composition, to form a mixing thing；By the mixing thing in a base
Machine-shaping on material；And cool down the mixing thing fully to solidify.
In the step of kneading the soft magnetic powder composition, the temperature range of mixing between
100 DEG C to 200 DEG C, the rotating speed of mixing is between 60rpm to 100rpm.
By the mixing thing on the base material the step of machine-shaping comprising using rubbing method or molding
The mixing thing is molded by method.
The present invention at least has the advantages that：Based on soft magnetic powder provided by the present invention
Composition just fully can solidify under normal temperature or middle low temperature, therefore height need not be carried out in forming process
Warm sintering processes.
In addition, there is enough pliability machines using the magnetic element made by the method for the present invention
The advantages of tool intensity, maximum permeability and magnetic density (sensing), while can be by whirlpool electricity
Stream is held in low-level, and minimizes magnetic hysteresis loss.
For enable be further understood that the present invention feature and technology contents, refer to below in connection with
Detailed description of the invention and accompanying drawing, but appended accompanying drawing is only provided with reference to being used with explanation, not
For being any limitation as to the present invention.
Description of the drawings
Fig. 1 is the schematic flow sheet of the preparation method of the magnetic element of the present invention.
Specific embodiment
The spies such as good permeability, high resistivity and low-loss are had based on ceramic magnet material
Property, particularly soft magnetic material are (such as：Magnetic nanoparticle) role's day in development in science and technology
Benefit is important, and the present invention provides a kind of soft magnetic powder composition with special compatibility composition, with
Meet market to various magnetic element or its spare part (such as：Microwave absorption material, magnetic conduction film,
Floppy disc, planar coil sensing material) demand.
Compared to the complex ferrite composition for being used for electromagnetic interference masking material now on the market,
Which must also overcome the variety of problems produced because of sintering, soft magnetic powder provided by the present invention
Composition can not only provide good operability, and as the soft magnetism unit made by raw material
Part/spare part also has enough pliability mechanical strengths, maximum permeability and magnetic density
The advantages of (sensing), while vortex flow can be held in low-level, and make magnetic hysteresis loss minimum
Change.But it is especially noted that the soft magnetic powder composition can carry out normal temperature or in
Solidify under low temperature (200 DEG C or lower temperature), high temperature sintering in forming process, need not be carried out
Process.
Next the constituent and weight of the soft magnetic powder composition first will simply be introduced
Proportioning, then in time supplements the reaction mechanism of the polysilicone constituent again.It is familiar with this
The technical staff in field can understand advantages of the present invention and technique effect by this specification content.Should
Understand, in this specification content described every details can be implemented based on different viewpoints or
Using, therefore various modifications and change are carried out under the spirit of the present invention, belong to the present invention equivalent
In the intention category of structure.
In a preferred embodiment of the invention, from processability, curability and product effect
Take in etc. viewpoint, the soft magnetic powder composition includes consisting of composition (by weight
Percentages)：(A) 80% to 93% magnetic material, its include alsifer powder,
At least one among Ni-Zn ferrite powders and Mn-Zn ferrite powders, wherein iron silicon
Containing 84% to 85% iron, 9% to 10% silicon and 5% to 6% in aluminium magnetic alloy powder
Aluminium, Mn-Zn ferrite powders have following chemical formula：(Mnx-Zn1-x)Fe2O4, the scope of x
For 0.005-0.995, Ni-Zn ferrite powders have following chemical formula：(Nix-Zn1-x)Fe2O4,
The scope of x is 0.005-0.995；And the macromolecular material of (B) 7% to 20%.It is worth explanation
, the magnetic material of composition (A), therefore can be according to due to different structures and form
Special proportioning simultaneously utilizes simple processing procedure and by various folded structure modes, make with it is with low cost,
Ultra-thin, and magnetic element the advantages of good flexibility.
For further, the magnetic material of composition (A) is given using different process technologies
Given shape；For example, alsifer powder can form sheet by rotary rolling mill
Structure, or alsifer powder can process to form irregular structure by ball milling,
Or alsifer powder can form chondritic by mist projection granulating.On the other hand,
Ni-Zn ferrite powders are with Mn-Zn ferrite powders due to the property and its crystal of ceramic material
The relation of structure, itself cannot be easily shaped into needle-like and laminated structure；Ni-Zn ferrite powders with
Both Mn-Zn ferrite powders can be processed to form irregular structure by ball milling, or described
Chondritic can be formed by chemical hydro-thermal method；Be possible with hydro-thermal method growth acicular titanium oxide or
Sheet aoxidizes silicon substrate, deposits Ni-Zn with hydro-thermal method or chemical vapor deposition method on substrate surface
Or Mn-Zn ferrite films, the ferrite powder of tool needle-like or laminated structure is made in this way.
The macromolecular material of composition (B) for the magnetic material of composition (A) is bonded together,
With the follow-up operations for forming of profit.In this specific embodiment, the macromolecular material of composition (B) can be
Thermoplastic resin or thermosetting resin, the thermoplastic resin can be listed below：Thermoplasticity polyamides
Imines (PI), polyaerylic acid (PAA), polybutene (PB), Merlon (PC), poly- second
Alkene (PE), polyether-ether-ketone (PEEK), PET (PET), polyisobutene
(PIB), PLA (PLA), polymethyl methacrylate (PMMA), polyacetals (POM),
Polypropylene (PP), polystyrene (PS), plasticity starch material (PSM), polysulfones (PSU/PSF),
Kynoar (PVDF), polytetrafluoroethylene (PTFE) (PTFE), polyvinyl alcohol (PVA), poly- second
It is enol butyral (PVB), polyvinyl chloride (PVC), polyvinylpyrrolidone (PVP), poly-
Diphenyl sulfide (PPS), PolyAmidelmide resin (PAI), polyacrylonitrile, poly terephthalic acid
Fourth diester (PBT), polyoxy dimethylbenzene (PPO), polyphenylene oxide (PPE), poly butyric ester (PHB),
PHA (PHA), polyphthalamide (PPA), celluloid (CN), acetic acid
Cellulose (CA), vinylon (vinylon), thermoplastic polyurethane (TPU), ethylene vinyl acetate second
Alkene ester (EVA), thermoplastic acrylic resin, thermoplastic polyester elastomer (TPEE), thermoplastic
Property rubber (TPR), polyamide (PA) are hot melt adhesive, polyolefin (PP) thermosol, wet
Gas hardening polyurethane (PUR) PUR, acrylonitrile-butadiene-three monomer-polymer of benzene diene
(ABS) with polyamide (PA) etc..
The thermosetting resin can be listed below：Heat curing-type pi (PI) resin, polyamides
Amine acid imide (PAI) resin, phenolic aldehyde (PF) resin, vinyl ester resin, urea-formaldehyde (UF)
Resin, silica resin (silicone), epoxy resin (Epoxy), heat curing-type polytetrafluoroethylene (PTFE)
(PTFE), Thermocurable polyimide (PI), unsaturated polyester (UP) (UP) resin, poly- amino first
Acid esters (PU) resin, tool pliability thermosetting resin carboxyl end of the liquid acrylonitrile-butadiene rubber (CTBN)
Or end amido LNBR (ATBN) modified epoxy and BMI-cyanate
(BT) resin etc..
Do not destroying in the range of desired effect of the invention, the soft magnetic powder composition
Various application demands can be based on and the optionally additive of adding ingredient (C) 2% to 5%.This
In specific embodiment, the additive bag of composition (C) containing 0.5% to 1% solvent, 0.3% to 1%
Curing agent, 0.1% to 0.5% couplant, 0.3% to 1% levelling agent, 0.3% to 0.5%
Defoamer, 0.4% to 1.3% plasticizer and 0.1% to 0.2% accelerator.
The solvent is used for the viscosity of regulation composition coating, and can be by the film forming matter in composition
Matter (i.e. magnetic material/macromolecular material) dissolves or dispersed, and has the function of plasticising；Institute
State solvent to be listed below：Isopropanol (IPA), propylene glycol monomethyl ether ethyl ester (PMA), dipropyl two
Alcohol methyl ether acetate (DPMA), dimethyl sulfoxide (DMSO) (DMSO), propylene glycol methyl ether acetate
(PGMEA), dimethyl amido ethanol (DMAE), butanone (MEK), dimethylbenzene (Xylene),
Dipropylene glycol methyl ether (DPM) and cyclohexanone (Cyclohexanone), ethylene glycol monobutyl ether
(BCS), diethylene glycol ether (EC), tripropylene glycol methyl ether (TPM), propylene glycol monomethyl ether
(PM), class phthalic acid lipid (DP), trimethylolpropane trimethacrylate (TMPTA)
Deng.
The curing agent for high polymer monomer being built bridge and solidifying which, in this specific embodiment
The curing agent for using mainly has aliphatic amine curing agent, aromatic amine curing agent, imidazoles solid
Agent, organic acid anhydride curing agent, organic hydrazides class curing agent, microcapsules class latent curing
Agent and light-cured type curing agent etc. are several.
The aliphatic amine curing agent can be listed below：Ethylenediamine, hexamethylene diamine, divinyl three
Amine and triethylene tetramine etc..The aromatic amine curing agent can be listed below：Two amido diphenyl sulphone (DPS)s
(DDS), two amido diphenyl-methanes (DDM) and m-phenylene diamine (MPD) (m-PDA) etc..It is described
Imidazole curing agent can be listed below：Imidazoles, 2-methylimidazole, 2-ethyl-4-methylimidazole, 2-
Phenylimidazole etc..The organic acid anhydride curing agent can be listed below：Tertiary amine/tertiary ammonium salt, season phosphine
Salt, lewis acid-amine complex, acetylacetone,2,4-pentanedione transition metal complex, lewis acid are (such as：
BF3、AlCl3、ZnCl2、PF5Deng) and primary amine/secondary amine formation complex compound etc..Organic acyl
Hydrazine curing agent can be listed below：Butanedioic acid hydrazides, adipic dihydrazide, decanedioic acid hydrazides,
M-phthalic acid hydrazides and to Para Hydroxy Benzoic Acid hydrazides (POBH) etc..The light-cured type is solid
Agent can be listed below：The sumptuous filling salt of aromatic diazonium salt, triaryl sulfonium salts, diaryl, iron
Aromatic hydrocarbons based compound etc..
The accelerator is used to speed polymeric hardener speed and reduces hardening time；This is concrete real
Apply the accelerator used in example to be listed below：It is many comprising the uncle in embedded matrix material
Amine (tertiary), such as penetrates into 2,4,6- tri- (two in poly- (4-Vinyl phenol) host material
First machine aminomethyl) benzene is poured a libation or CVC companies are provided OMICURETM、24EMI、
33-DD5, BC120, U-210 (N- (4- chlorphenyls)-N, N- dimethyl glands), U-35 (rings
Aliphatic series-double urea compound), U-415=U52 (4 ' methane double (phenyl dimethyl urea)), U-24 (2,
4- toluene-two (dimethyl urea)), U-405 (phenyl dimethyl urea), U410 (80/20 toluene
Dimethyl urea).
The couplant is used to increase organic associativity and between inorganic material；This specific embodiment
Used in couplant be mainly silane coupling agent.The levelling agent is used for regulation composition coating
Surface tension, to increase the planarization on surface after colloid/coating film forming；In this specific embodiment
The levelling agent for using is mainly the mixture of organosilicon and cyclohexanone, for example：German Bi Ke is sold
BYK300 that BYK-108, the Germany Bi Ke for selling is sold etc..The defoamer is used to adjust
The surface tension of composite paint, and the bubble inside colloid/glued membrane with surface can be eliminated；This tool
Defoamer used in body embodiment is mainly the mixture of organosilicon and polymer, for example：Moral
BYK088, BYK PMA that state Bi Ke is sold etc..
The plasticizer is used for the pliability of the magnetic element for improving soft magnetic powder composition, with
There is the problem of rupture of membranes or rupture in avoiding film forming procedure or use；Used in this specific embodiment
Plasticizer can be listed below：Diethyl oxalate ester, glycerine, trietbhlene glycol, fourth (base)
- (base) butyl phthalate, butyl phthalate (DBP), polyethylene glycol (PEG),
Trietbhlene glycol hexane, octyl phthalate (DDP), fourth (base)-(base) neighbour's benzene
Dicarboxylic acid esters, dioctyl phthalate.
The characteristics of referring to Fig. 1, soft magnetic powder composition of the present invention is described in detail as above, connects down
Preparation method the magnetic element according to the soft magnetic powder composition will be further illustrated.
As shown in figure 1, the preparation method of the magnetic element includes：Step S100, kneads described soft
Magnaglo composition, to form a mixing thing；Step S102, by the mixing thing in a base
Machine-shaping on material；And step S104, cool down the mixing thing fully to solidify.
Step S100 can choose different structure and shape according to applicable frequency range when actual embodiment
The alsifer powder of state, Ni-Zn ferrite powders and/or Mn-Zn ferrite powders
End, and itself and macromolecular material are kneaded according to specified weight ratio.This specific embodiment
Whether and different the technological means of middle employing can be in response to the use of solvent, specifically, can
Using extruder (extruder), kneading machine (compounder), mixer (internal mixter),
Kneader (kneader), modeling spectrometer (brabender), or roller machine (roll miller) etc.,
And it is magnetic material is uniform with polymer material mixing in the presence of solvent-free；And idealized conditions
Be, melting temperature between about 100 DEG C to 200 DEG C, wherein be again optimal, rotating speed Jie with 150 DEG C
In about 60rpm to 100rpm, mixing time between about 3 hours to 6 hours, so
Obtain with excellent specific property (such as：Intensity, elongation, toughness) mixing thing.
On the other hand, magnetic material also can be kneaded with bonding solvent with macromolecular material, adopted
Technological means is：At normal temperatures will be both mixings described uniform using three cylinders.Must explanation
, any other mixing mode well-known to those skilled in the art can be applied to
In step S100.
The mixing thing is given when actual embodiment by step S102 using suitable processing mode
To be molded.The technological means adopted in this specific embodiment can have according to the final use of material
Institute is different, the mixing thing of a part specifically, can be attached by scraper, then by institute
The mixing thing for attaching is coated on a base material and is struck off；And idealized conditions are, scraper with
The distance between base material is maintained at about 0.05mm to 3mm or so, and the walking speed of base material is maintained at about
0.5m/min to 3m/min or so, coating temperature between about 130 DEG C to 200 DEG C, in this way
Can make mixing thing that uniform thickness is formed on base material.
In addition, the mixing thing also can straight forming, for example, using corresponding
A male mould and a master tooling under vacuum conditions by the mixing thing compression molding；And manage
Thinking condition is that it is left that the distance between male mould and master tooling are maintained at about 0.05mm to 3mm
The right side, forming degree is between about 120 DEG C to 150 DEG C, and the time was between about 0.5 hour to 1 hour.
It should be noted that, any other machine-shaping mode well-known to those skilled in the art,
Can be applied in step S102.
Step S104 when actual embodiment, just may be used under normal temperature or middle low temperature by the mixing thing after shaping
Fully solidify, it should be noted that, also the mixing thing can be heated depending on being actually needed；And
Idealized conditions are the mixing thing to be cooled down within the temperature range of about 10 DEG C to 30 DEG C
About 10 seconds to 30 seconds, and the magnetic element of Jing cooling and solidifyings has enough pliability machinery strong
The advantages of degree, maximum permeability and magnetic density (sensing), while can protect vortex flow
Low-level is held in, and minimizes magnetic hysteresis loss, can further make various spare part, for example
Microwave absorption material, magnetic conduction film, floppy disc, planar coil sensing material etc..
Table one and table two are refer to, below will be with (without sintering, real using the method for the present invention
Apply magnetic colloid/glued membrane made by example 1～5) with using existing method (must through sintering,
Colloid/glued membrane made by comparative example 1～2) carrying out multigroup experiment, to illustrate by with spy
The technique effect that the soft magnetic powder composition of different constituent and weight proportion can be generated.
In following table, embodiment 1～5 be respectively based on different soft magnetic powder compositions can in low temperature
Magnetic colloid/the glued membrane of solidification, it is as follows：
Embodiment 1
The be suitable for frequency range of the soft magnetic powder composition of the present embodiment is between 0.01MHz
To 4GHz, the wherein magnetic material of composition (A) includes 85% to 90% sheet iron sial magnetic
Property alloy powder, the macromolecular material of composition (B) includes 10% to 15% ethyl vinyl acetate second
Alkene ester resin (EVA).
Embodiment 2
The be suitable for frequency range of the soft magnetic powder composition of the present embodiment is between 0.01MHz
To 2MHz, the wherein magnetic material of composition (A) includes 85% to 88% Mn-Zn iron oxygen
Body powder and 2% to 5% alsifer powder, the macromolecular material bag of composition (B)
Containing 10% ethylene-vinyl acetate resin (EVA).
For further, 85% to 88% Mn-Zn ferrite powders are all spherical
Mn-Zn ferrite powders, and 2% to the 5% alsifer powder comprising 1% to
3% sheet alsifer powder, 0.5% to 1% irregular or spherical iron sial magnetic
Property alloy powder and 0.5% to 1% needle-like alsifer powder.
Embodiment 3
The be suitable for frequency range of the soft magnetic powder composition of the present embodiment is between 2MHz to 1
The magnetic material of GHz, wherein composition (A) includes 85% to 88% Ni-Zn ferrite powders
And 2% to 5% alsifer powder, the macromolecular material of composition (B) includes 10%
Ethylene-vinyl acetate resin (EVA).
For further, 85% to 88% Ni-Zn ferrite powders are all spherical
Ni-Zn ferrite powders, and 2% to the 5% alsifer powder comprising 1% to
3% sheet alsifer powder, 0.5% to 1% irregular or spherical iron sial magnetic
Property alloy powder and 0.5% to 1% needle-like alsifer powder.
Embodiment 4
The be suitable for frequency range of the soft magnetic powder composition of the present embodiment is between 0.01MHz
To 4GHz, the composition includes：The magnetic material of composition (A) includes 80% to 88%
Sheet alsifer powder；The macromolecular material of composition (B) includes 10% to 15%
Carboxyl end of the liquid acrylonitrile-butadiene rubber (CTBN) modified epoxy；And composition (C) 2% to 5%
Additive, solvent which includes 1% to 3%, 0.3% to 0.5% curing agent, 0.1% to 0.5%
Couplant, 0.3% to 0.5% levelling agent and 0.3% to 0.5% defoamer.
Embodiment 5
The be suitable for frequency range of the soft magnetic powder composition of the present embodiment is between 0.01MHz
To 4GHz, the composition includes：Composition (A) magnetic material includes 80% to 88% piece
Shape alsifer powder；Composition (B) macromolecular material includes 10% to 15% poly- second
Enol (PVA) and/or polyvinyl butyral resin (PVB) and/or polyvinylpyrrolidone (PVP)；
And the additive of composition (C) 2% to 5%, its include 1% to 3% solvent, 0.3% to
0.5% plasticizer, 0.1% to 0.5% couplant, 0.3% to 0.5% levelling agent and 0.3%
To 0.5% defoamer.
For further, 1% to 3% solvent is cyclohexanone, 0.3% to 0.5% institute
It is dicyandiamide (DICY) to state curing agent, and 0.1% to 0.5% couplant is that siloxanes is coupled
Agent, 0.3% to 0.5% levelling agent is the mixture of organosilicon and cyclohexanone, 0.3% to
0.5% defoamer is the mixture of organosilicon and polymer.
Table one is according to comparative example and the test result () of the magnetic element of embodiment
Table two is according to comparative example and the test result (two) of the magnetic element of embodiment
From above-mentioned comparative result, embodiment 1～4 all meets the basic definition of soft magnetic materials；
In addition, the saturation flux density (Bs) of embodiment 1～4 is all better than with initial permeability (μ i)
Comparative example 1～2, shows the faradic quantity according to produced by the magnetic material of embodiment 1～4
Than more than the faradic quantity according to produced by the magnetic material of comparative example 1～2；Additionally,
All it is more than 10 according to the resistance value of the magnetic material of embodiment 1～46Ω, therefore it is adapted to low, middle and high frequency
Environment use demand, reviews, discomfort too high according to the resistance value of the magnetic material of comparative example 1～2
Share in the environment of high frequency.
In sum, compared to complex ferrite composition common on the market now, which must also
The variety of problems produced because of sintering, soft magnetic powder composition provided by the present invention must be overcome
Just can fully solidify under normal temperature or low temperature, high temperature sintering process in forming process, need not be carried out.
Hold above-mentioned, the magnetic element of Jing cooling and solidifyings has enough mechanical strengths, maximum magnetic conductance
The advantages of rate and magnetic density (sensing), while vortex flow can be held in low-level,
And minimize magnetic hysteresis loss, can further make various spare part, such as microwave absorption material,
Magnetic conduction film, floppy disc, planar coil sensing material etc..
In addition, in the soft magnetic powder composition, the magnetic material of composition (A) is due to having
Different structures and form, therefore according to special proportioning and simple processing procedure can be utilized and by many
Kind folded structure mode, make have the advantages that it is with low cost, ultra-thin, and good flexibility magnetic unit
Part.
Additionally, the present invention can by alsifer powder, Ni-Zn ferrite powders and
The advantage of Mn-Zn ferrite powders is combined, therefore application is wider.
For the advantage is presented by the present invention in description above, those skilled in the art can all carry
Go out modification and the other embodiment for invention.Hence, it will be appreciated that the present invention is not exposed to institute's public affairs
The specific embodiment opened is limited, and modification and other embodiment can be included protection scope of the present invention
It is interior.Even if here has used particular term, but is used with description concept for general, not
Limit protection domain defined in claim.
Claims (13)
1. a kind of soft magnetic powder composition, it is characterised in that the soft magnetic powder composition
Comprising consisting of composition (by weight percentage)：
(A) 80% to 93% magnetic material, which includes alsifer powder, Ni-Zn
At least one among ferrite powder and Mn-Zn ferrite powders；And
(B) 7% to 20% macromolecular material.
2. soft magnetic powder composition as claimed in claim 1, it is characterised in that composition (A)
Magnetic material comprising 85% to 90% sheet alsifer powder, composition (B)
Macromolecular material includes 10% to 15% thermoplastic resin.
3. soft magnetic powder composition as claimed in claim 2, it is characterised in that 10% to
15% thermoplastic resin is ethylene-vinyl acetate resin (EVA).
4. soft magnetic powder composition as claimed in claim 1, it is characterised in that composition (A)
Magnetic material comprising 85% to 88% Mn-Zn ferrite powders and 2% to 5% iron sial
Magnetic alloy powder, the macromolecular material of composition (B) is thermoplastic resin.
5. soft magnetic powder composition as claimed in claim 4, it is characterised in that 85% to
The 88% Mn-Zn ferrite powders are all spherical Mn-Zn ferrite powders, and 2% to
The 5% alsifer powder includes 1% to 3% sheet alsifer powder
End, 0.5% to 1% irregular or spherical alsifer powder and 0.5% to 1%
Needle-like alsifer powder, and the thermoplastic resin is ethylene-vinyl acetate resin
(EVA)。
6. soft magnetic powder composition as claimed in claim 1, it is characterised in that composition (A)
Magnetic material comprising 85% to 88% Ni-Zn ferrite powders and 2% to 5% iron sial
Magnetic alloy powder, the macromolecular material of composition (B) is thermoplastic resin.
7. soft magnetic powder composition as claimed in claim 6, it is characterised in that 85% to
The 88% Ni-Zn ferrite powders are all spherical Ni-Zn ferrite powders, and 2% to 5%
The alsifer powder comprising 1% to 3% sheet alsifer powder,
0.5% to 1% irregular or spherical alsifer powder and 0.5% to 1% needle-like
Alsifer powder, and the thermoplastic resin is ethylene-vinyl acetate resin
(EVA)。
8. soft magnetic powder composition as claimed in claim 1, it is characterised in that composition (A)
Magnetic material comprising 80% to 88% sheet alsifer powder, composition (B)
Macromolecular material includes 10% to 15% thermosetting resin.
9. soft magnetic powder composition as claimed in claim 8, it is characterised in that described soft
The Magnaglo composition further additive comprising composition (C) 2% to 5%, which includes 0.5%
Solvent, 0.3% to 1% curing agent, 0.1% to 0.5% couplant to 1%, 0.3% to
0.5% levelling agent and 0.3% to 0.5% defoamer, 0.4% to 1.3% plasticizer and
0.1% to 0.2 accelerator.
10. soft magnetic powder composition as claimed in claim 9, it is characterised in that described
Solvent is cyclohexanone, and the curing agent is dicyandiamide (DICY), and the couplant is siloxanes coupling
Mixture, the levelling agent are the mixture of organosilicon and cyclohexanone, and the defoamer is organosilicon
With the mixture of polymer, and the thermosetting resin be carboxyl end of the liquid acrylonitrile-butadiene rubber (CTBN)
Modified epoxy, the plasticizer be diethyl oxalate ester, glycerine, trietbhlene glycol,
Fourth (base)-(base) butyl phthalate, butyl phthalate (DBP), poly- second two
Alcohol (PEG), trietbhlene glycol hexane, octyl phthalate (DDP), fourth (base)-
(base) phthalic acid ester or dioctyl phthalate.
11. a kind of preparation methods of magnetic element, it is characterised in that comprise the following steps：
Soft magnetic powder composition as claimed in claim 1 is kneaded, to form a mixing thing；
The machine-shaping on the base material by the mixing thing；And
Cool down the mixing thing fully to solidify.
12. preparation methods as claimed in claim 11, it is characterised in that described soft kneading
In the step of Magnaglo composition, the temperature range of mixing is kneaded between 100 DEG C to 200 DEG C
Rotating speed between 60rpm to 100rpm.
13. preparation methods as claimed in claim 11, it is characterised in that by the mixing thing
Comprising being given the mixing thing using rubbing method or die pressing the step of machine-shaping on the base material
To be molded.
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