WO2009078453A1 - 圧粉磁心用鉄粉 - Google Patents
圧粉磁心用鉄粉 Download PDFInfo
- Publication number
- WO2009078453A1 WO2009078453A1 PCT/JP2008/073026 JP2008073026W WO2009078453A1 WO 2009078453 A1 WO2009078453 A1 WO 2009078453A1 JP 2008073026 W JP2008073026 W JP 2008073026W WO 2009078453 A1 WO2009078453 A1 WO 2009078453A1
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- WO
- WIPO (PCT)
- Prior art keywords
- iron powder
- dust core
- oxide film
- iron
- ratio
- Prior art date
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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
- H01F1/33—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 mixtures of metallic and non-metallic particles; metallic particles having oxide skin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/102—Metallic powder coated with organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/16—Metallic particles coated with a non-metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
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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
- H01F1/20—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12181—Composite powder [e.g., coated, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
- Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
Definitions
- the present invention relates to an iron powder for a dust core. ⁇ .3 ⁇ 4 ⁇
- a magnetic steel sheet As a soft magnetic material for a magnetic core of a motor or a transformer, a magnetic steel sheet is often used at a low frequency of several kHz or less. At high frequencies of several tens of kHz and higher, magnetic oxide materials such as Mn-Zn-based ferrite are frequently used.
- Dust cores made by pressing iron powder are often used at tens of kHz or less. Dust cores can be mold-molded, so the degree of freedom of product shape is very high, and even complex magnetic core shapes can be manufactured with high precision and simple processes. .
- Patent Document 1 JP-2003 the 217 919 (Patent Document 1), the iron by interposing by containing Si in the iron powder, and an insulator composed mainly of Si_ ⁇ 2 and MgO between iron powder Technologies to reduce losses have been proposed.
- Patent Document 2 JP-2003 the 217 919 (Patent Document 1), the iron by interposing by containing Si in the iron powder, and an insulator composed mainly of Si_ ⁇ 2 and MgO between iron powder Technologies to reduce losses have been proposed.
- Patent Document 2 describes the initial transmission in a high frequency region by limiting the Si content and distribution so that the Si concentration in the surface portion is higher than the Si concentration in the central portion. Techniques have been proposed to improve the initial permeability (which affects iron loss).
- Patent Document 3 proposes an iron-based powder that is coated with a film containing a silicone resin opi pigment.
- Patent Document 4 discloses a technique for producing a metal powder for a dust core by concentrating Si on the surface of the powder by a gas phase reaction or further performing an insulation coating treatment. Has been.
- Patent Document 4 the surface of the powder particles after the gas phase reaction is oxidized to form SiO 2 , thereby avoiding heat generation of fine particles and improving adhesion with the insulating coating material. I can do it.
- examples that have verified the effect are not disclosed. Disclosure of the invention
- Patent Document 2 even if the Si content in the iron powder and the distribution of Si throughout the iron powder are limited, an oxide film is formed on the iron powder surface, and this oxide film becomes magnetic. There were problems such as disturbing properties (harm).
- the iron powder having an insulating coating formed by the method of Patent Document 4 also has an insufficient level of practical resistance when used as a dust core.
- An object of the present invention is to advantageously solve the above-described problems, and to provide a highly reliable iron powder for a powder magnetic core that does not cause a decrease in magnetic properties and mechanical strength.
- the inventors have conducted extensive research focusing on the characteristics of the oxide film on the iron powder surface, and as a result, by optimizing the composition of the surface oxide film, We have obtained the knowledge that can be achieved advantageously.
- the present invention is based on the above findings.
- the gist configuration of the present invention is as follows.
- Iron powder with an oxide film on the surface has a Si-based oxide strength (consisting substantially of) with a Si / Fe ratio of SiZFe ⁇ 0.8 in atomic ratio. Iron powder.
- Fig. 1 shows an example of Si2p peak separation by XPS of the iron powder for dust core of the present invention (top), more ideal example of Si2p peak separation of another iron powder for dust core of the present invention ( It is a figure shown in comparison with (lower stage).
- BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below.
- the surface of the iron powder is coated with a Si-based oxide and the composition thereof is SiZFe ⁇ 0.8, preferably Si ZFe ⁇ 1.1, a dust core having excellent magnetic properties can be obtained.
- Si is deposited on the iron powder by a gas-phase reaction method such as PVD (Physical Vapor Deposition) or CVD (Chemical Vapor Deposition). It is preferable to perform a two-stage treatment in which the treatment is performed in an oxidizing atmosphere after the treatment. However, there is no particular limitation as long as these methods (Si adhesion, surface enrichment treatment, and oxidation treatment) can be completed at once.
- the iron powder used in the present invention can be applied to various types such as atomized iron powder, reduced iron powder, and electrolytic iron powder, and is not particularly limited. It is not something. The composition and dimensions of the iron powder are not particularly limited. Force Fe 99 mass.
- the average particle size is preferably about 10 to 500 ⁇ m.
- deposition reaction Fe 3 Si is formed, and a high-concentration layer of Si is formed on the iron powder surface (hereinafter referred to as deposition reaction). (Called “deposition reaction”).
- the SiCl 4 gas does not spread over the entire iron powder, and it is difficult to uniformly form Fe 3 Si on the entire surface of the iron powder. Therefore, when processing in large quantities, it is preferable to treat the iron powder while agitating it in order to suppress non-uniform gas phase reactions.
- a method for agitating the iron powder rotating the container itself containing the iron powder, stirring the iron powder using a stirring blade (agitation blade), is a non-oxidizing gas into the container, the reaction such as SiCl 4 Examples include, but are not limited to, a method of fluidizing iron powder by introducing a reaction gas or a mixed gas thereof.
- the flow rate of the SiCl 4 gas is preferably about 0.01 to 10 NL / min / kg with respect to the weight of iron powder in the container from the viewpoints of effects and economy.
- Oxidation of the iron powder surface can be performed by adding an oxidizing gas during the Si deposition reaction. As another method, after the Si deposition reaction is completed, oxidation treatment with an oxidizing gas may be separately performed.
- Industrially available oxidizing gases include 0 2 , H 2 0, CO, etc., but the type is not particularly limited.
- the SiZFe ratio can be controlled by the CVD conditions and the oxidation conditions. Roughly speaking, increasing the CVD time and temperature increases the SiZFe ratio, and the SiZFe ratio can be increased by increasing the oxygen partial pressure during the subsequent oxidation treatment. Further, by increasing the temperature and oxygen partial pressure in the oxidation treatment, Ru tended to Si0 2 weight and Si0 2 / Fe 2 Si0 4 ratio increases.
- the composition of the surface oxide can be analyzed using photoelectron spectroscopy (XPS: X-ray Photoelectron Spectroscopy) or Auger Electron Spectroscopy (AES).
- XPS is a method for measuring the spectrum of photoelectrons generated by irradiating X-rays
- AES is a method for measuring the spectrum of Auger electrons generated by irradiating electron beams.
- the atomic ratio on the iron powder surface obtained by the measurement method as described above is SiZFe ⁇ OS.
- the upper limit of SiZFe is especially Although it is not necessary to specify, the composition of Si-based oxide is optimal when Si, Fe ⁇ 3.0
- a method for determining the proportion of Si0 2 in the Si-based oxide film can be used XPS.
- Fe 2 Si0 4 and FeSi0 3 can be considered in addition to metal Si and Si0 2 dissolved in Fe.
- XPS XPS measuring the spectrum of Si2p
- metallic Si and (in Fe) Si0 2 is the peak, 99.6EV, it appears near 103.5 eV.
- the Fe 2 SiO 4 peak appears almost in the middle
- the FeSi0 3 peak appears almost in the middle between the Si0 2 and Fe 2 Si0 4 peaks. Therefore, by separating peaks of the actual Si2p spectra, it is possible to determine the proportion of Si0 2.
- the lower graph of FIG. 1 is an analysis result of another iron powder sample shown in an example described later.
- the proportion of Si0 2 in the entire Si-based oxide in the oxide film (approximately the total of Si0 2 , Fe 2 Si0 4, and FeSi0 3 ) obtained by the measurement method as described above is 60% by mass or more, The effect of improving magnetic properties is greater.
- the existence ratio of Si0 2 with respect to Fe 2 Si0 4 (weight ratio) is 7 times or more, a large improvement effect of higher magnetic properties. More preferably, it is 7.0 times or more.
- the upper limit does not need to be specified, but is usually 20 times or less.
- the oxide film on the surface of the iron powder obtained through the Si deposition and surface enrichment treatment and oxidation treatment is mainly composed of Si-based oxides (particularly, Si0 2 , Fe 2 Si0 4 and FeSi0 3 ). Whether or not an oxide film made of Si oxide is formed is determined by the surface analysis using the XPS or the like in the process of sputtering in the depth direction from the surface force of the particle until the Si oxide peak reaches a predetermined depth. It can be determined by being held.
- the thickness of the oxide film of Si-based oxide power formed on the surface of the iron powder is not particularly limited. However, in order to stably obtain the effect of improving the magnetic characteristics, it is preferable that the thickness is about 0.1 / m or more. On the other hand, if the oxide film becomes excessively thick, the compressibility is unnecessarily lowered, leading to a decrease in magnetic flux density. Therefore, an upper limit may be appropriately set for the thickness of the oxide film according to the intended magnetic flux density. For example, it is preferable that the upper limit is about 1.0 ⁇ as a guide.
- the thickness of the oxide film is defined as the depth at which the peak height of the Si-based oxide becomes 1/2 of the surface layer by sputtering in the depth direction from the particle surface layer in the surface analysis using XPS or the like.
- a coating that covers the surface of the iron powder particles in a layered manner is applied to the surface oxide film of the iron powder and further subjected to an insulation coating treatment. It is preferable to form an insulating layer having a structure.
- a material for insulation coating after iron powder is pressed and formed into a desired shape However, it is not particularly limited as long as it can maintain the required insulation.
- Examples of such materials include Al, Si, Mg, Ca, Mn, Zn, Ni, Fe, Ti, V, Bi, B, Mo, W, Na, and oxygen.
- an amorphous material typified by magnetic oxide such as spinel ferrite and liquid glass can also be used.
- examples of insulating coating materials include phosphate chemical conversion coatings and chromate chemical conversion coatings. Phosphoric acid Chlorination treatment film can also contain boric acid and Mg.
- phosphate compounds such as aluminum phosphate, zinc phosphate, calcium phosphate and iron phosphate can be used.
- an organic resin such as an epoxy resin, a phenol resin, a silicone resin, and a polyimide resin may be used.
- Si-based resins such as silicone resins are suitable for application to the iron powder of the present invention, as already described.
- a surfactant or a silane coupling agent may be added for the purpose of increasing the adhesion of the insulating material to the surface of the iron powder particles or for the purpose of increasing the uniformity of the insulating layer.
- the addition amount is preferably in the range of 0.001 to 1% by mass with respect to the total amount of the insulating layer.
- the thickness of the insulating layer formed on the iron powder surface oxide film may be appropriately set according to the desired degree of insulation, but is generally preferably about 10 to 10,000 nm. That is, when the thickness is about 10 nm or more, an excellent insulating effect can be easily obtained. On the other hand, if the insulating layer is excessively thick, the density of the magnetic parts is unnecessarily lowered, making it difficult to obtain a high magnetic flux density. Therefore, the thickness of the insulating layer is preferably about lOOOOnm or less. The thickness of the insulating layer can be known by directly observing the iron powder or converting it from the amount of the supplied coating material.
- any conventionally known film forming method can be suitably applied.
- coating methods that can be used include fluidized bed, dipping, and spraying. Each method includes a step of drying a solvent for dissolving or dispersing the insulating material after the coating step or simultaneously with the coating step.
- a reaction layer may be formed between the insulating layer and the surface of the iron powder particles in order to improve the adhesion of the insulating layer to the iron powder particles and prevent peeling during pressure molding.
- the formation of a strong reaction layer is preferably performed by chemical conversion treatment.
- iron powder insulating coated iron powder having an insulating layer formed on the surface of the iron powder particles is pressure-molded to form a dust core.
- iron powder Prior to pressure forming, iron powder may be subjected to metal exploration, amide-based as necessary.
- the blending amount of the lubricant is preferably 0.5% by mass or less with respect to 100% by mass of the iron powder. This is because as the blending amount of the lubricant increases, the density of the dust core decreases.
- any conventionally known method can be applied as the pressure molding method.
- a mold forming method that uses a uniaxial press to perform pressure forming at room temperature, a warm compaction method that performs pressure forming at a warm temperature, a mold lubrication method that performs pressure forming by lubricating the mold, Warm compaction using die wall lubrication, in which it is done warmly, a certain layer is a pressure forming method in which the pressure is developed under pressure, and a hydrostatic pressure press method.
- the powder magnetic core obtained as described above is preferably annealed at a temperature range of 400 or more, more preferably 600 to 1000 for the purpose of strain relief in order to improve magnetic properties.
- the annealing time is preferably about 5 to 300 minutes, more preferably about 10 to 120 minutes from the viewpoint of effect and economy.
- the iron powder commercially available spherical iron powder (average particle size 100 / zm) was used.
- the Si content in the spherical iron powder was less than 0.01% by mass.
- This iron powder was spread in a quartz container to a layer thickness of 3 to 10 mm, and Si was deposited on the surface of the iron powder by thermal CVD. Specifically, after preheating at 700 to 1000 in argon gas for 5 minutes, SiCl 4 gas was flowed at a flow rate of INL / min / kg for 1 to 30 minutes to deposit Si on the surface of the iron powder.
- the oxidation treatment was performed during or after the Si deposition.
- the treatment temperature, time and oxygen partial pressure were set as shown in Table 1.
- Sensitivity factor method relative response factor method
- a silicone resin was coated on the iron powder with an oxide film by the following method.
- “SR2400” TM from Dow Corning Toray Co., Ltd. was used as the silicone lunar effect.
- the coating liquid adjusted with xylene so that the resin content is 5 mass% is sprayed onto the iron powder fluidized in the apparatus container with a tumbling fluidized bed type coating device using a spray. Was sprayed to 0.5% by mass. After spraying, the fluid state was maintained for 20 minutes to ensure drying. Furthermore, heat treatment was performed at 250 ° C. for 60 minutes in the air, and the silicone resin was heated and cured to obtain an insulating coated iron powder.
- the thickness of the insulating layer obtained was about 0.5; zm.
- the insulation coated iron powder obtained in this way is pressure-molded and used for measurement.
- Table 1 also shows the results of examining the specific resistance of the dust core obtained by force.
- the specific resistance was measured at a current of 1 A by the four probe method. The larger the specific resistance, the better the insulation at the grain boundary (original iron powder surface) inside the dust core, and thus the lower the iron loss.
- the iron powder for a dust core by forming a Si-based oxide film having a composition satisfying Si, Fe ⁇ 0.8 in atomic ratio on the surface of the iron powder, the specific resistance is high, so the iron loss is low. A dust core can be obtained. Further, in accordance with the present invention, that the ratio of Si0 2 in the Si-based oxide film is more than 60 mass%, further the existence ratio of Si are two for Fe 2 Si0 4 7 times or more in the Si-based acid film By controlling, a low iron loss powder magnetic core with better characteristics can be obtained.
- the compression characteristics are excellent, and as a result, the mechanical characteristics of the dust core are not impaired.
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2700564A CA2700564C (en) | 2007-12-14 | 2008-12-11 | Iron powder for dust cores |
US12/733,699 US8916268B2 (en) | 2007-12-14 | 2008-12-11 | Iron powder for dust cores |
EP08862237.8A EP2221837B1 (en) | 2007-12-14 | 2008-12-11 | Iron powder for dust core |
CN2008801155568A CN101855681B (zh) | 2007-12-14 | 2008-12-11 | 压粉磁芯用铁粉 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007-323925 | 2007-12-14 | ||
JP2007323925A JP4802182B2 (ja) | 2007-12-14 | 2007-12-14 | 圧粉磁心用鉄粉 |
Publications (1)
Publication Number | Publication Date |
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WO2009078453A1 true WO2009078453A1 (ja) | 2009-06-25 |
Family
ID=40795566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2008/073026 WO2009078453A1 (ja) | 2007-12-14 | 2008-12-11 | 圧粉磁心用鉄粉 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8916268B2 (ja) |
EP (1) | EP2221837B1 (ja) |
JP (1) | JP4802182B2 (ja) |
CN (1) | CN101855681B (ja) |
CA (1) | CA2700564C (ja) |
WO (1) | WO2009078453A1 (ja) |
Cited By (2)
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WO2013108643A1 (ja) * | 2012-01-17 | 2013-07-25 | 株式会社日立産機システム | 圧粉軟磁性体 |
US11222739B2 (en) | 2016-03-10 | 2022-01-11 | Panasonic Intellectual Property Management Co., Ltd. | Ferrite material, composite magnetic body, coil component, and power supply device |
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CA2773441C (en) * | 2009-09-18 | 2018-02-06 | Hoeganaes Ab (Publ) | Ferromagnetic powder composition and method for its production |
JP6399299B2 (ja) * | 2013-12-26 | 2018-10-03 | Tdk株式会社 | 軟磁性圧粉磁心 |
CN104028748B (zh) * | 2014-05-28 | 2015-12-02 | 浙江大学 | 一种软磁复合材料的表面硼化绝缘包覆方法 |
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US20200258667A1 (en) * | 2017-10-04 | 2020-08-13 | Mitsubishi Materials Corporation | Silica-based insulator-coated soft magnetic powder and method for producing same |
DE112018004572T8 (de) * | 2017-10-17 | 2020-07-30 | Denso Corporation | Komprimierter pulver-magnetkern, pulver für magnetischen kern, und deren herstellungsverfahren |
CN108899152B (zh) * | 2018-07-02 | 2019-12-24 | 武汉科技大学 | 一种多绝缘层铁硅基软磁粉芯及其制备方法 |
CN111192735A (zh) * | 2020-01-17 | 2020-05-22 | 深圳市铂科新材料股份有限公司 | 一种绝缘包覆的金属软磁粉末及其制备方法和用途 |
JP7379274B2 (ja) * | 2020-06-15 | 2023-11-14 | 株式会社神戸製鋼所 | 圧粉磁心用粉末 |
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2008
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- 2008-12-11 EP EP08862237.8A patent/EP2221837B1/en active Active
- 2008-12-11 US US12/733,699 patent/US8916268B2/en active Active
- 2008-12-11 CA CA2700564A patent/CA2700564C/en not_active Expired - Fee Related
- 2008-12-11 WO PCT/JP2008/073026 patent/WO2009078453A1/ja active Application Filing
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JPH1187123A (ja) | 1997-09-08 | 1999-03-30 | Mitsubishi Materials Corp | 高周波用軟磁性粉末 |
JP2003303711A (ja) | 2001-03-27 | 2003-10-24 | Jfe Steel Kk | 鉄基粉末およびこれを用いた圧粉磁心ならびに鉄基粉末の製造方法 |
JP2003217919A (ja) | 2002-01-17 | 2003-07-31 | Nec Tokin Corp | 圧粉磁芯及びこれを用いた高周波リアクトル |
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JP2007231330A (ja) | 2006-02-28 | 2007-09-13 | Jfe Steel Kk | 圧粉磁心用金属粉末および圧粉磁心の製造方法 |
JP2007231331A (ja) * | 2006-02-28 | 2007-09-13 | Jfe Steel Kk | 圧粉磁心用金属粉末および圧粉磁心の製造方法 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013108643A1 (ja) * | 2012-01-17 | 2013-07-25 | 株式会社日立産機システム | 圧粉軟磁性体 |
JP2013149659A (ja) * | 2012-01-17 | 2013-08-01 | Hitachi Industrial Equipment Systems Co Ltd | 圧粉軟磁性体 |
US11222739B2 (en) | 2016-03-10 | 2022-01-11 | Panasonic Intellectual Property Management Co., Ltd. | Ferrite material, composite magnetic body, coil component, and power supply device |
Also Published As
Publication number | Publication date |
---|---|
CA2700564C (en) | 2013-04-02 |
US8916268B2 (en) | 2014-12-23 |
US20100239879A1 (en) | 2010-09-23 |
CA2700564A1 (en) | 2009-06-25 |
JP4802182B2 (ja) | 2011-10-26 |
CN101855681A (zh) | 2010-10-06 |
CN101855681B (zh) | 2013-03-27 |
JP2009147176A (ja) | 2009-07-02 |
EP2221837A1 (en) | 2010-08-25 |
EP2221837A4 (en) | 2016-11-23 |
EP2221837B1 (en) | 2020-02-05 |
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