KR20170026039A - Softmagnetic powder composition and manufacturing method of magnetic component - Google Patents
Softmagnetic powder composition and manufacturing method of magnetic component Download PDFInfo
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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
- H01F1/20—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 in the form of particles, e.g. powder
- H01F1/22—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 in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/24—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 in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
- H01F1/26—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 in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated by macromolecular organic substances
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- 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
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- 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
- H01F1/34—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 non-metallic substances, e.g. ferrites
- H01F1/342—Oxides
- H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
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- 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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Abstract
A method of manufacturing a magnetic element according to the present invention includes the steps of: mixing a soft magnetic powder composition to form a mixture; Applying the mixture to a substrate; And cooling the mixture applied to the substrate. Here, the soft magnetic powder composition comprises a magnetic material (A) in a range of 80 to 93% by weight including at least one of a sentust magnetic alloy powder, a Ni-Zn ferrite powder and a Mn-Zn ferrite powder; And 7 to 20% by weight of the polymeric material (B).
Description
The present invention relates to a ferrite magnet material, and more particularly to a soft magnetic powder composition capable of solidifying at room temperature or low temperature and a method of manufacturing a magnetic element using the soft magnetic powder composition.
As technology advances, electronic products tend to be developed in the direction of miniaturization and high output. In addition, the frequency bands used in devices such as mobile phones or notebooks tend to be high, and currently use GHz frequencies. In line with this trend, magnetic devices require characteristics such as high magnetic induction rate, low core loss, high saturation sensing, and high mechanical strength, while extending the frequency range.
A soft magnetic metal material and a ferrite material are included as a main material of the magnetic element. The soft magnetic metal material has a higher saturation magnetic flux density than the ferrite material, but has a high consumption rate, a high price, a high specific gravity, There is a problem. Ferrite materials have the advantage of low cost and low consumption at frequencies between 10 kHz and 100 kHz.
Typically, the ferrite material (e.g., powder) is first compacted, molded and then sintered at high temperature to form a magnetic element. Namely, a well-known manufacturing method of a magnetic element requires solving the problem of sinterability of a ferrite material, and is therefore strictly controlled with respect to curing conditions, so that a sintering property is lowered, a magnetic induction ratio is lowered and a frequency characteristic is lowered, And so on. Also, the composite ferrite composition prepared on the basis of the ferrite material is required to undergo a curing reaction at a high temperature to be completely completed.
It is an object of the present invention to provide a soft magnetic powder composition which is solidified and molded in a relatively non-rigid environment.
In order to achieve the above object, the soft magnetic powder composition according to the present invention comprises at least one selected from the group consisting of sentust magnetic alloy powder, Ni-Zn ferrite powder and Mn-Zn ferrite powder, (A); And 7 to 20% by weight of the polymeric material (B).
It is still another object of the present invention to provide a method of manufacturing a magnetic element capable of manufacturing an automated magnetic element satisfying a demand for high productivity and miniaturization of various elements.
In order to achieve the above object, a method of manufacturing a magnetic element according to the present invention comprises: mixing a soft magnetic powder composition to form a mixture; Applying the mixture to a substrate; And cooling the mixture.
The present invention has at least the following beneficial effects. That is, the soft magnetic powder composition according to the present invention can be solidified at room temperature or low temperature, so that a high-temperature sintering process is not required in the molding process.
Further, the magnetic element manufactured according to the method of the present invention can maintain the low eddy current while minimizing the magnetic hysteresis loss while having advantages such as sufficient soft mechanical strength, maximum magnetic permeability and magnetic flux density (induction).
1 is a flow chart of a method of manufacturing a magnetic element of the present invention.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Ceramic magnetic materials, especially soft magnetic materials (for example, magnetic nanoparticles), which have good magnetic permeability, high resistance coefficient and low consumption characteristics, become more and more important as technology advances. Therefore, the present invention relates to a soft magnetic powder composition (For example, a microwave absorbing material, an investment film, a magnetized piece, and an induction material of a plane coil).
A complex ferrite composition using an electromagnetic interference shielding material sold on the market needs to solve various problems due to a sintering process. However, the soft magnetic powder composition according to the present invention has advantages of ease of production, Soft magnetic elements or components can maintain low levels of eddy currents while having sufficient soft mechanical strength, maximum permeability, and magnetic flux density (induction), thereby minimizing magnetic hysteresis losses. Here, the soft magnetic powder composition can proceed solidification at room temperature or moderate temperature (200 ° C or below), and a high-temperature sintering treatment is not required in the molding process.
Next, the compositional components and weight ratios of the soft magnetic powder composition will be briefly described, and then the reaction mechanism of the silicone resin composition will be appropriately supplemented. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Accordingly, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
In a preferred embodiment of the present invention, the soft magnetic powder composition comprises at least one of a Sendust magnetic alloy powder, a Ni-Zn ferrite powder and a Mn-Zn ferrite powder, considering the processing, A magnetic material (A) present in a range of 80 to 93% by weight; And a polymer material (B) present in a range of 7 to 20 wt%, wherein the sentust magnetic alloy powder contains iron in the range of 84 to 85 wt%, silicon in the range of 9 to 10 wt% (Mn x -Zn 1 -x ) Fe 2 O 4 , the range of x is 0.005-0.995, and the content of Ni- The formula of the Zn ferrite powder is (Ni x -Zn 1 -x ) Fe 2 O 4 , and the range of x is 0.005-0.995. Here, the magnetic material (A) may have various structures and shapes, and it is possible to manufacture a magnetic element having a low cost, an ultra-thin shape, and a good flexibility by a specific proportion, a simple manufacturing process, can do.
More specifically, it is possible to form a specific type of magnetic material (A) through various kinds of processing techniques; For example, the sentust magnetic alloy powder is formed into a piece-like structure through a rolling process, and the sentust magnetic alloy powder is formed into an irregular structure through a ball milling process, and the sentust magnetic alloy powder is formed through a spray particle generation method And is formed into a spherical structure. On the other hand, Ni-Zn ferrite powder and Mn-Zn ferrite powder are difficult to be formed into a needle-like and a piece-like structure due to the characteristics of the ceramic material and the relationship of its crystal structure; The Ni-Zn ferrite powders and the Mn-Zn ferrite powders are formed into an irregular structure through a ball mill process and they can be formed into a spherical structure through a chemical hydrothermal process; Also, a Ni-Zn or Mn-Zn ferrite film is deposited on the surface of the base material by a hydrothermal method or a chemical vapor deposition method using a hydrothermal method to form a long needle-like titanium or a flaky silica base material, Powder can be formed.
The magnetic material (A) is adhered using the polymer material (B) so that the subsequent molding operation is advantageous. In this embodiment, the polymer material (B) may be a thermoplastic resin or a thermosetting resin, and the thermoplastic resin may be, for example, a thermoplastic polyimide (PI), a polyacrylic acid (PAA), a polybutylene (PC), polyethylene (PE), polyetheretherketone (PEEK), polyethylene terephthalate (PET), polyisobutylene (PIB), polylactic acid (PLA), polymethyl methacrylate (POM), polypropylene (PP), polystyrene (PS), plastic starch material (PSM), polysulfone (PSU / PSF), polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PVA), polyvinyl butyral (PVB), polyvinyl chloride (PVC), polyvinyl pyrrolidone (PVP), polyphenylene sulfide (PPS), polyamideimide resin (PAI), polyacrylonitrile, Polybutylene terephthalate (PBT), propylene glycol monomethyl ether acetate (PPO), polyphenylene (PPE), polyhydroxybutyrate (PHB), polyhydroxyalkanoate (PHA), polyphthalamide (PPA), celluloid (CN), cellulose acetate (CA), vinylon, thermoplastic polyurethane (TPA), ethylene vinyl acetate (EVA), thermoplastic acrylic resin, thermoplastic polyester elastomer (TPEE), thermoplastic rubber (TPR), polyamide (PA) hot melt adhesives, polyolefin (PP) hot melt adhesives, Urethane (PUR) hot melt adhesive, ABS resin (Acrylonitrile butadiene styrene) and polyamide (PA) resin.
The thermosetting resin may be, for example, a thermoplastic polyimide (PI) resin, a polyamideimide resin (PAI), a phenol formaldehyde resin (PF) resin, a vinyl ester resin, a urea formaldehyde (UF) resin, A thermosetting polyimide (PI), an unsaturated polyester (UP) resin, a polyurethane (PU) resin, a soft thermosetting resin, a carboxy-terminal liquid acrylonitrile rubber (CTBN) or amino-terminal liquid nitrile rubber (ATBN) modified epoxy resin and bismaleimide triazine (BT) resin.
To the extent that the anticipated effect of the present invention is maintained, the soft magnetic powder composition may optionally contain additive (C) present in the range of 2 to 5% by weight in practical application. In this embodiment, the additive (C) is selected from the group consisting of a solvent in the range of 0.5 to 1 wt%, a curing agent in the range of 0.3 to 1 wt%, a coupling agent in the range of 0.1 to 0.5 wt% A defoamer present in the range of 0.3 to 0.5 weight percent, a plasticizer present in the range of 0.4 to 1.3 weight percent, and an accelerator in the range of 0.1 to 0.2 weight percent .
The solvent is used to control the viscosity of the composition paints and also dissolves or evenly disperses the film formulations (i.e., magnetic or polymeric materials) in the composition, and even has the function of plasticity enhancement; Such solvents include, for example, primary amines (IPA), phorbol 12-myristate 13-acetic acid (PMA), tertiary amines (DPMA), dimethylsulfoxide (DMSO), propylene glycol methyl ether acetate (DMAE), methyl ethyl ketone (MEK), xylene, dipropylene glycol methyl ether (DPM) and cyclohexanone, ethylene glycol monobutyl ether (BCS), diethylene glycol diethyl ether aromatic (EC), tripropylene glycol methyl ether (TPM), propylene glycol methyl ether (PM), diethylene glycol diethylene ether (DP), trimethylolpropane triacrylate (TMPTA) and the like.
The curing agent is used for cross-linking of a polymer and curing thereof. In the present embodiment, the curing agent mainly used is an aliphatic amine curing agent, an aromatic amine curing agent, an imidazole curing agent, a polyethylene glycol curing agent, a polyphenylene oxide curing agent, Flow-curing agents and commercialized curing agents.
The aliphatic amine-based curing agent may be, for example, ethylenediamine, hexamethylenediamine, diethylenetriamine and triethylenetetramine. The aromatic amine-based curing agent may be, for example, diaminodiphenylsulfone (DDS), diaminodiphenylmethane (DDM) and m-phenylenediamine (m-PDA). The imidazole-based curing agent may be, for example, imidazole, 2-methylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole or the like. The organic acid anhydride-based curing agent may be, for example, a tertiary amine / tertiary amine salt, a quaternary phosphonium salt, a compound of a Lewis acid and an amine, an acetylacetone transitional metal compound, a Lewis acid (e.g., BF 3 , AlCl 3 , ZnCl 2 , PF 5 Etc.) and a compound formed with methylamine / hexamethylenediamine. The polyphenylene oxide type curing agent may be, for example, succinic acid hydrazide, urea resin, sebacic acid hydrazide, isopropyl alcohol and p-hydroxybenzoic acid hydrazide (POBH). The adhering curing agent may be, for example, a dimethyldiphenyl component, a triarylsulfonium salt, a dialkyl diaryliodonium salt, an iron aromatic compound, or the like.
The accelerator may be used to improve the coagulation speed of the polymer and to reduce the coagulation time. The accelerator used in the present embodiment may be a tertiary polyamine embedded in a polymer matrix material, for example, a poly-p-vinylphenol substrate (Omicure TM ) 24EMI, 33-DD5, BC120, U-210 (Monuron N- (4-chlorophenyl) U-25 (4'-methylenebis (phenyldimethyl ether)), U-24 (2,4-diene bisdimethyl ether) , U-405 (phenyl dimethyl ether), U410 (80/20 toluene bis dimethyl ether).
The coupling agent is used for increasing the adhesion between the organic material and the inorganic material; The coupling agent mainly used in this embodiment is a silane coupling agent. The leveling agent is used to control the surface tension of the composition paint so that the surface of the colloid / colloid film is flat after molding; The leveling agent mainly used in this embodiment is a mixture of silicon and a polymer, and examples thereof include BYK-108 and BYK300 sold by BYK, Germany. The antifoam agent is used to control the surface tension of the composition paint and can remove air bubbles on the inner surface of the colloid / film; The antifoaming agent mainly used in this embodiment is a mixture of silicon and a polymer, and examples thereof include BYK088 and BYK PMA sold by BYK, Germany.
The plasticizer may be used to improve the flexibility of the magnetic element of the soft magnetic powder composition to prevent problems of film breakage or rupture during the film formation process or during use; The plasticizers used in this embodiment include, for example, diethyl oxalic acid esters, glycerin, triethylene glycol, benzylbutyl phthalate, methylimidazole (DBP), polyethylene glycol (PEG), triethylene glycol hexane, octyl phthalate ), Benzyl butyl phthalate or dioctyl phthalate, and the like.
As shown in Fig. 1, the characteristics of the soft magnetic powder composition of the present invention have already been described in detail above. Next, a method of manufacturing the magnetic element of the soft magnetic powder composition will be described in detail. As shown in FIG. 1, the manufacturing method of the magnetic element includes the steps of: (S100) mixing the soft magnetic powder composition to form a mixture; Forming the mixture on the substrate to form (S102); And cooling and sufficiently solidifying the mixture (S104).
When practicing step S100, it is possible to select the Sendust magnetic alloy powder, Ni-Zn ferrite powder and / or Mn-Zn ferrite powder having different structures and shapes depending on the frequency range to be applied, It can be mixed with a polymer material. The technical means used in this embodiment may be different depending on whether or not the solvent is used. Specifically, an extruder, a compounder, an internal mixer, a kneader, a brabender, or a roll miller may be used. The magnetic material and the polymer material are uniformly mixed; The mixing temperature is preferably about 100 to 200 DEG C, more preferably 150 DEG C, the rotation speed is about 60 to 100 rpm, and the mixing time is about 3 to 6 hours . Under these conditions, a mixture having the best physical properties (e.g., strength, elongation, toughness) can be obtained.
On the other hand, the magnetic material and the polymer material can be mixed and mixed with a solvent, and they are uniformly mixed using a three-wheel roller at room temperature as a technical means to be used. Here, any other mixing scheme known to those skilled in the art may be used in step S100.
When practicing step S102, the mixture can be molded using a suitable processing method. The technical means used in this embodiment may vary depending on the end use of the material. Specifically, a portion of the mixture is uniformly applied to a substrate using a scraper; The distance between the scraper and the substrate is preferably about 0.05 to 3 mm, the substrate moving speed is about 0.5 to 3 m / min, and the coating temperature is preferably about 130 to 200 캜. Under these conditions, the mixture can be formed into a uniform thickness on the substrate.
In addition, the mixture may be subjected to integrated molding. For example, by using a corresponding male mold and female mold, the mixture is crushed and molded in a vacuum environment; It is preferable that the distance between the male mold and the female mold is about 0.05 to 3 mm, the molding temperature is about 120 to 150 DEG C, and the molding time is about 0.5 to 1 hour. Herein, a person having ordinary skill in the art can apply to step S102 using any other known mixing method.
When the step S104 is practically carried out, the molded mixture can be sufficiently solidified at normal temperature or low temperature. Here, it is also possible to heat the mixture according to actual demand; It is preferable that the mixture is subjected to a coagulation treatment for about 10 to 30 seconds at a temperature range of about 10 to 30 占 폚. The cooled and coagulated magnetic element has advantages such as a sufficient soft mechanical strength, a maximum magnetic permeability and a magnetic flux density (induction), and can maintain a low level eddy current so that magnetic hysteresis loss is minimized, An absorbing material, an investment film, a magnet piece, a flat coil induction material, and the like.
Referring to Tables 1 and 2, the colloid / colloid film produced by the production method of the present invention (no sintering process, Experimental Examples 1 to 5) and the known method (sintering step required, Comparative Examples 1 and 2) The technical effect of the soft magnetic powder composition having the special composition component and the weight proportion is explained through various experiments comparing the colloidal / colloid film produced by the present invention. In the following table, Experimental Examples 1 to 5 show colloidal / colloidal films formed by solidification at medium and low temperatures by various soft magnetic powder compositions.
[Experimental Example 1]
The soft magnetic powder composition of this embodiment is applied in the frequency range between 0.01 MHz and 4 GHz, wherein the magnetic material (A) comprises a particulate sensor alloy magnetic alloy powder present in the range of 85 to 90 wt% The polymeric material (B) contains ethylene vinyl acetate (EVA) in the range of 10 to 15% by weight.
[Experimental Example 2]
The soft magnetic powder composition of this embodiment is applied to a frequency range between 0.01 MHz and 2 MHz, wherein the magnetic material (A) comprises a Mn-Zn ferrite powder present in the range of 85 to 88 wt% , And the polymeric material (B) contains ethylene vinyl acetate (EVA) in a range of 10% by weight.
More specifically, the Mn-Zn ferrite powder present in the range of 85 to 88 wt% is spherical Mn-Zn ferrite powder, and the sentust magnetic alloy powder present in the range of 2 to 5 wt% The present invention relates to a method for producing a magnetic alloy powder, which comprises the steps of: (a) preparing a magnetic alloy powder in a range of 0.5 to 1% by weight; .
[Experimental Example 3]
The soft magnetic powder composition of this embodiment is applied to a frequency range between 2 MHz and 1 GHz, wherein the magnetic material (A) comprises Ni-Zn ferrite powder present in the range of 85 to 88 weight% and 2 to 5 weight% , And the polymeric material (B) contains ethylene vinyl acetate (EVA) in a range of 10% by weight.
More specifically, the Ni-Zn ferrite powder present in the range of 85 to 88 wt% is spherical Ni-Zn ferrite powder, and the sentust magnetic alloy powder present in the range of 2 to 5 wt% The present invention relates to a method for producing a magnetic alloy powder, which comprises the steps of: (a) preparing a magnetic alloy powder in a range of 0.5 to 1% by weight; .
[Experimental Example 4]
The soft magnetic powder composition of the present embodiment is applied to a frequency range between 0.01 MHz and 4 GHz, and the composition is in the range of 80 to 88 wt% including the particulate sensor alloy magnetic alloy powder (A); A polymeric material (B) comprising a carboxy-terminated liquid acrylonitrile rubber (CTBN) modified epoxy resin present in the range of 10 to 15% by weight; And a solvent present in the range of 1 to 3 wt%, a curing agent in the range of 0.3 to 0.5 wt%, a coupling agent in the range of 0.1 to 0.5 wt%, a leveling agent in the range of 0.3 to 0.5 wt% And an antifoaming agent present in the range of 0.3 to 0.5 wt.%.
[Experimental Example 5]
The soft magnetic powder composition of this embodiment is applied to a frequency range between 0.01 MHz and 4 GHz, and the composition is comprised of a magnetic material (A) in the range of 80 to 88 wt% including the particulate sensored magnetic alloy powder; A polymeric material (B) comprising polyvinyl alcohol (PVA) and / or polyvinyl butyral (PVB) and / or polyvinyl pyrrolidone (PVP) present in the range of 10 to 15% by weight; A solvent present in the range of 1 to 3 wt.%, A plasticizer in the range of 0.3 to 0.5 wt.%, A coupling agent in the range of 0.1 to 0.5 wt.%, A leveling agent in the range of 0.3 to 0.5 wt. (C) present in the range of 2 to 5% by weight, including defoaming agent present in the range of 0.3 to 0.5% by weight.
More specifically, the solvent present in the range of 1 to 3 wt% is cyclohexanone, and the curing agent present in the range of 0.3 to 0.5 wt% is dicyandiamide (DICY), and is in the range of 0.1 to 0.5 wt% Wherein the leveling agent present in the range of 0.3 to 0.5% by weight is a mixture of silicon and cyclohexanone, and the defoaming agent present in the range of 0.3 to 0.5% by weight is silicon and cyclohexane It is a discussion mixture.
According to the above comparison result, the following results are obtained. That is, Examples 1 to 4 all conform to the basic definition of a soft magnetic material; The saturation magnetic flux density (Bs) and the minimum magnetic permeability (mu) of Examples 1 to 4 were superior to those of Comparative Examples 1 to 2, and the amounts of induced currents produced by the magnetic materials of Examples 1 to 4 were higher than those of Comparative Example 1 Is greater than the quantity of induced currents produced by the magnetic material of 2 to 2; Since the resistances of the magnetic materials of Examples 1 to 4 are all higher than 106 OMEGA, they are applied to the low-frequency environment, whereas the resistances of the magnetic materials of Comparative Examples 1 and 2 are too high to be used in a high frequency environment I do not.
According to the above description, it is necessary to solve various problems of the ferrite composition sold on the market at present, but the soft magnetic powder composition according to the present invention can proceed to solidification at room temperature or low temperature, High temperature sintering treatment is not required.
The complex ferrite composition used as an electromagnetic interference shielding material sold in the market today needs to solve various problems due to the sintering process. However, the soft magnetic powder composition according to the present invention has good operability, Soft magnetic elements or parts or assemblies can maintain low levels of eddy currents while minimizing magnetic hysteresis losses while having the advantages of sufficient soft mechanical strength, maximum permeability and magnetic flux density (induction).
Following this, the cooled solidified soft magnetic element has advantages such as sufficient soft mechanical strength, maximum magnetic permeability and magnetic flux density (induction), while keeping the eddy current at a low level, minimizing the magnetic hysteresis loss, And assemblies, for example, microwave absorbing materials, investment films, soft strips, flat coil induction materials, and the like.
In addition, the magnetic material (A) has different structures and shapes in the soft magnetic powder composition, so that it can be produced by a specific proportion, by a simple manufacturing process and by various types of superposition methods, and is low in cost, slim, A magnetic element having advantages can be manufactured.
Further, the present invention can be widely used because it can integrate the advantages of the sentust magnetic alloy powder, Ni-Zn ferrite powder and Mn-Zn ferrite powder.
It is to be understood that the invention is not limited to the disclosed embodiments, but is capable of many modifications and alterations, all of which are within the scope of the appended claims. It is self-evident.
Claims (13)
And a polymeric material (B) present in a range of 7 to 20 wt%.
Wherein the magnetic material (A) comprises a particulate sensored magnetic alloy powder present in a range of 85 to 90 wt%, and the polymer material (B) comprises a thermoplastic resin present in a range of 10 to 15 wt% And a soft magnetic powder composition.
Wherein the thermoplastic resin present in the range of 10 to 15 wt% is ethylene vinyl acetate (EVA) resin.
Wherein said magnetic material (A) comprises an existing Mn-Zn ferrite powder in the range of 85 to 88 wt% and a sensored magnetic alloy powder present in the range of 2 to 5 wt%, said polymeric material (B) Wherein the soft magnetic powder composition is a soft resin.
The Mn-Zn ferrite powder present in the range of 85 to 88 wt% is spherical Mn-Zn ferrite powder, and the sentust magnetic alloy powder present in the range of 2 to 5 wt% is in the range of 1 to 3 wt% The present invention relates to a method for producing a magnetic alloy powder, which comprises the steps of: (a) preparing a magnetic alloy powder having a particle diameter of from 0.1 to 1% by weight, Wherein the thermoplastic resin is an ethylene vinyl acetate (EVA) resin.
Wherein the magnetic material (A) comprises a Ni-Zn ferrite powder present in a range of 85 to 88 wt% and a sensored magnetic alloy powder present in a range of 2 to 5 wt%, the polymer material (B) Wherein the soft magnetic powder composition is a soft resin.
The Ni-Zn ferrite powder present in the range of 85 to 88 wt% is spherical Ni-Zn ferrite powder, and the sentust magnetic alloy powder present in the range of 2 to 5 wt% is in the range of 1 to 3 wt% The present invention relates to a method for producing a magnetic alloy powder, which comprises the steps of: (a) preparing a magnetic alloy powder having a particle diameter of from 0.1 to 1% by weight, Wherein the thermoplastic resin is an ethylene vinyl acetate (EVA) resin.
Wherein the magnetic material (A) comprises a particulate sensored magnetic alloy powder present in a range of 80 to 88 wt%, and the polymer material (B) comprises a thermosetting resin in a range of 10 to 15 wt% And a soft magnetic powder composition.
A solvent present in the range of 0.5 to 1 wt%, a curing agent in the range of 0.3 to 1 wt%, a coupling agent in the range of 0.1 to 0.5 wt%, a leveling agent in the range of 0.3 to 0.5 wt% (C) present in the range of from 0.3 to 1% by weight, the plasticizer being present in the range of 0.4 to 1.3% by weight and the accelerator present in the range of 0.1 to 0.2% by weight, ). ≪ / RTI >
Wherein the solvent is cyclohexanone, the curing agent is dicyandiamide (DICY), the coupling agent is a silane coupling agent, the leveling agent is a mixture of silicon and cyclohexanone, the defoaming agent is a mixture of silicon and polymer, Wherein the thermosetting resin is a carboxyl-terminal liquid acrylonitrile rubber (CTBN) modified epoxy resin, wherein the plasticizer is selected from the group consisting of diethyl oxalic acid ester, glycerin, triethylene glycol, benzylbutyl phthalate, methylimidazole (DBP), polyethylene glycol , Triethylene glycol hexane, octyl phthalate (DDP), benzyl butyl phthalate or dioctyl phthalate.
Processing said mixture into a substrate and molding; And
And cooling the mixture to sufficiently coagulate it.
Wherein the mixing temperature ranges from 100 ° C to 200 ° C and the mixing rotation speed ranges from 60 rpm to 100 rpm in the step of mixing the soft magnetic powder composition.
Wherein the step of forming and molding the mixture on a substrate includes forming the mixture using a coating method or a compression molding method.
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| TW104128390A TW201708560A (en) | 2015-08-28 | 2015-08-28 | Softmagnetic powder composition and manufacturing method of magnetic component |
| TW104128390 | 2015-08-28 |
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| JP (1) | JP2017043749A (en) |
| KR (1) | KR20170026039A (en) |
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| CN107652495B (en) * | 2017-10-20 | 2020-01-10 | 南京大学 | Wave-absorbing patch matched with high-silica/phenolic aldehyde heat-proof material and preparation method thereof |
| CN108461243B (en) * | 2018-04-02 | 2021-04-30 | 浙江理工大学 | Porous camellia-shaped MnFe2O4@ C core-shell structure compound and preparation method thereof |
| JP2019212664A (en) * | 2018-05-31 | 2019-12-12 | 住友ベークライト株式会社 | Resin composition for forming magnetic member, magnetic member, coil, manufacturing method of magnetic member, and kit for forming magnetic member |
| CN109133895A (en) * | 2018-08-16 | 2019-01-04 | 安徽信息工程学院 | Ferrite material |
| EP4317294A1 (en) | 2021-03-22 | 2024-02-07 | FUJIFILM Corporation | Composition, magnetic particle-containing cured product, magnetic particle-introduced substrate, and electronic material |
| CN113372636B (en) * | 2021-05-28 | 2022-08-05 | 福州大学 | Folding-resistant magnetic polyethylene film and preparation method thereof |
| CN116174704A (en) * | 2022-11-11 | 2023-05-30 | 西华大学 | Mixed high corrosion-resistant FeSiCr electromagnetic wave absorber and preparation method thereof |
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| JPH0332804A (en) * | 1989-06-29 | 1991-02-13 | Tokin Corp | Manufacture and its manufacturing device for molded body having hollow part |
| JPH06204044A (en) * | 1992-12-25 | 1994-07-22 | Sony Corp | Rotary transformer and manufacture thereof |
| JP2001288368A (en) * | 2000-04-05 | 2001-10-16 | Tokin Corp | Electromagnetic wave-shielding clothing and method for producing the shield sheet |
| JP4917484B2 (en) * | 2006-06-16 | 2012-04-18 | ニッタ株式会社 | Magnetic sheet, antenna device using the same, and electronic information transmission device |
| JP2009088237A (en) * | 2007-09-28 | 2009-04-23 | Nitta Ind Corp | Electromagnetic interference suppressor and electromagnetic interference suppressing method using the same |
| JP4818339B2 (en) * | 2007-10-29 | 2011-11-16 | ソニーケミカル＆インフォメーションデバイス株式会社 | Magnetic sheet |
| JP5879026B2 (en) * | 2010-07-23 | 2016-03-08 | Ｎｅｃトーキン株式会社 | Flame retardant noise suppression sheet |
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| JP2017043749A (en) | 2017-03-02 |
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