JP2021111737A - 圧粉磁心の製造方法および圧粉磁心 - Google Patents
圧粉磁心の製造方法および圧粉磁心 Download PDFInfo
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- 238000000034 method Methods 0.000 claims description 52
- 230000008569 process Effects 0.000 claims description 15
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- 229910000976 Electrical steel Inorganic materials 0.000 description 1
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- JJQZDUKDJDQPMQ-UHFFFAOYSA-N dimethoxy(dimethyl)silane Chemical compound CO[Si](C)(C)OC JJQZDUKDJDQPMQ-UHFFFAOYSA-N 0.000 description 1
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- 125000003700 epoxy group Chemical group 0.000 description 1
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- BFIMXCBKRLYJQO-UHFFFAOYSA-N ethanolate;hafnium(4+) Chemical compound [Hf+4].CC[O-].CC[O-].CC[O-].CC[O-] BFIMXCBKRLYJQO-UHFFFAOYSA-N 0.000 description 1
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- ZEIWWVGGEOHESL-UHFFFAOYSA-N methanol;titanium Chemical compound [Ti].OC.OC.OC.OC ZEIWWVGGEOHESL-UHFFFAOYSA-N 0.000 description 1
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- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
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- UAEJRRZPRZCUBE-UHFFFAOYSA-N trimethoxyalumane Chemical compound [Al+3].[O-]C.[O-]C.[O-]C UAEJRRZPRZCUBE-UHFFFAOYSA-N 0.000 description 1
- 238000009692 water atomization Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
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- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/08—Metallic powder characterised by particles having an amorphous microstructure
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- B22—CASTING; POWDER METALLURGY
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- 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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- B22F1/14—Treatment of metallic powder
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- 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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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/16—Both compacting and sintering in successive or repeated steps
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- 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
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/20—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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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/08—Cores, Yokes, or armatures made from powder
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- B22—CASTING; POWDER METALLURGY
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- B22F2201/00—Treatment under specific atmosphere
- B22F2201/03—Oxygen
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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Abstract
Description
1.1.圧粉磁心
第1実施形態に係る圧粉磁心は、後述する圧粉磁心の製造方法にて製造される。本実施形態の圧粉磁心は、インダクターなどの磁心に適用される。以下、圧粉磁心に含まれる、軟磁性粉末および絶縁体などについて説明する。
軟磁性粉末は、軟磁性材料を含む粒子である。軟磁性材料としては、例えば、純鉄、ケイ素鋼のようなFe−Si系合金、パーマロイのようなFe−Ni系合金、パーメンジュールのようなFe−Co系合金、センダストのようなFe−Si−Al系合金、Fe−Cr−Si系合金、およびFe−Cr−Al系合金などの各種Fe系合金、各種Ni系合金、各種Co系合金などが挙げられる。これらのうち、透磁率、磁束密度などの磁気特性、およびコストなどの生産性の観点から、各種Fe系合金を用いることが好ましい。
絶縁体は、軟磁性粉末の表面の少なくとも一部を、例えば島状に被覆する。軟磁性粉末に対する絶縁体被膜が島状であっても、後述する軟磁性粉末間の結合の効果は発現する。但し、絶縁体による絶縁機能や上記効果を増大させる観点から、絶縁体は軟磁性粉末表面の全てを被覆することが好ましい。
圧粉磁心は、その他の成分として、必要に応じて結着材を含んでもよい。結着材としては、樹脂バインダーや無機バインダーなどの公知のバインダーが挙げられる。ここで、本発明の圧粉磁心は、軟磁性粉末間で水酸基や未結合手が結合を形成するため、バインダーを使用しないか、あるいは従来よりもバインダーの使用量を低減することが可能となる。圧粉磁心は、結着材の他に公知の添加剤などを含んでもよい。なお、水酸基および未結合手の形成と作用とについては後述する。
第1実施形態に係る圧粉磁心の製造方法について図1を参照して説明する。図1に示すように、本実施形態に係る圧粉磁心の製造方法は、工程S1から工程S6を含む。なお、図1に示す工程フローは一例であって、これに限定されるものではない。
第2実施形態に係る圧粉磁心の製造方法について説明する。本実施形態の圧粉磁心の製造方法は、第1実施形態の圧粉磁心の製造方法に対して、エネルギーの付与と所定雰囲気下への暴露とを同時に行うものである。この点以外は第1実施形態と同様であるため、第1実施形態と同一の構成については重複する説明は省略する。なお、以下の説明では便宜上、図1を参照することとする。
第3実施形態に係る圧粉磁心の製造方法について説明する。本実施形態の圧粉磁心の製造方法は、第1実施形態の圧粉磁心の製造方法に対して、振動の付与とエネルギーの付与とを同時に行うと共に、エネルギーの付与方法を異ならせたものである。これらの点以外は第1実施形態と同様であるため、第1実施形態と同一の構成については重複する説明は省略する。なお、以下の説明では便宜上、図1を参照することとする。
Claims (9)
- 絶縁体で被覆された軟磁性粉末の表面に、エネルギーを付与する工程と、
大気圧下露点−30℃以上15℃以下の雰囲気に前記軟磁性粉末を暴露する工程と、
前記軟磁性粉末を20MPa以上400MPa以下の押圧で成形体を形成する工程と、を含むことを特徴とする圧粉磁心の製造方法。 - 前記エネルギーを付与する工程と、前記軟磁性粉末を暴露する工程とが同時に行われることを特徴とする、請求項1に記載の圧粉磁心の製造方法。
- 前記成形体を100℃以上400℃以下の温度で焼成する工程をさらに含むことを特徴とする、請求項1または請求項2に記載の圧粉磁心の製造方法。
- 前記エネルギーを付与する工程の前に、前記軟磁性粉末に振動を付与する工程をさらに含むことを特徴とする、請求項1から請求項3のいずれか1項に記載の圧粉磁心の製造方法。
- 前記エネルギーを付与する工程において、前記軟磁性粉末に前記エネルギーと同時に振動を付与することを特徴とする、請求項1から請求項3のいずれか1項に記載の圧粉磁心の製造方法。
- 前記エネルギーの付与として、紫外線を照射することを特徴とする、請求項1から請求項5のいずれか1項に記載の圧粉磁心の製造方法。
- 前記エネルギーの付与として、前記軟磁性粉末を電離気体またはオゾンガスに曝すことを特徴とする、請求項1から請求項5のいずれか1項に記載の圧粉磁心の製造方法。
- 前記軟磁性粉末はアモルファス相を含むことを特徴とする、請求項1から請求項7のいずれか1項に記載の圧粉磁心の製造方法。
- 請求項1から請求項8のいずれか1項に記載の圧粉磁心の製造方法にて製造されることを特徴とする圧粉磁心。
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