JP2021021097A - 複合磁性粉及びこれを用いた圧粉磁心、並びに、複合磁性粉の製造方法 - Google Patents
複合磁性粉及びこれを用いた圧粉磁心、並びに、複合磁性粉の製造方法 Download PDFInfo
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- 239000006247 magnetic powder Substances 0.000 title claims abstract description 85
- 239000002131 composite material Substances 0.000 title claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000843 powder Substances 0.000 title description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 36
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 27
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000012298 atmosphere Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 13
- 238000009792 diffusion process Methods 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical class [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 229910017135 Fe—O Inorganic materials 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229910001004 magnetic alloy Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229910017082 Fe-Si Inorganic materials 0.000 description 1
- 229910017133 Fe—Si Inorganic materials 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000001420 photoelectron spectroscopy Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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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- 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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- 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
- B22F1/14—Treatment of metallic powder
- B22F1/142—Thermal or thermo-mechanical treatment
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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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- 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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- 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
- H01F41/0253—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 for manufacturing permanent magnets
- H01F41/026—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 for manufacturing permanent magnets protecting methods against environmental influences, e.g. oxygen, by surface treatment
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- Powder Metallurgy (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
平均粒径が3μmであるFe粉を容器に投入し、Fe粉30gに対してエタノールを100ml加えることによって、エタノールからなる液体中にFe粉を分散させた。次に、容器をオイルバスに入れることによって、液体の温度を40℃に保持した。この状態で、容器にシリコンエトキシド6gとアンモニア水(アンモニア濃度:29wt%)2gと水18gを添加し、攪拌しながら3時間反応させることにより、Fe粉の表面に厚さ50nmの絶縁層を形成した。反応後、十分の量のエタノールで希釈・洗浄した後、濾過することによって複合磁性粉を取り出した。取り出された複合磁性粉を真空乾燥機を用いて180℃で8時間乾燥した。乾燥後、回転式チューブ炉を用いて1%水素含有窒素雰囲気で600℃で1時間加熱処理した。昇温速度は200℃/時間とした。これにより、実施例1の複合磁性粉を得た。
熱処理温度を700℃に設定した他は、実施例1と同じ方法で実施例2の複合磁性粉を得た。
熱処理温度を800℃に設定した他は、実施例1と同じ方法で実施例3の複合磁性粉を得た。
熱処理時間を10分に設定した他は、実施例3と同じ方法で実施例4の複合磁性粉を得た。
熱処理温度を900℃に設定した他は、実施例4と同じ方法で実施例5の複合磁性粉を得た。
昇温速度を400℃/時間に設定した他は、実施例4と同じ方法で実施例6の複合磁性粉を得た。
昇温速度を400℃/時間に設定した他は、実施例5と同じ方法で実施例7の複合磁性粉を得た。
熱処理を行わなかった他は、実施例1と同じ方法で比較例1の複合磁性粉を得た。
熱処理温度を500℃に設定した他は、実施例1と同じ方法で比較例2の複合磁性粉を得た。
実施例1〜7及び比較例1〜2の複合磁性粉を円形状の筒に入れ、表面をならした後に荷重を掛けペレット状にし、光電子分光法にてO/Si比を測定した。装置は、PHI製QuanteraIIを用いて単色化したX線のAl−kα線を使用し、電圧を15kV、出力を25W、分析径をφ100μmに設定した。エネルギー詳細分析方法は、分光器にかけるエネルギー(PassEnergy)と測定エネルギー間隔(Step)をPassEnergy=140eV,Step=0.5eVとし、10回積算することにより行った。深さ方向の分析は、Arガスを使用し、1kV、7mAの条件で2mm×2mmのエリアをエッチングしながら測定した。かかる条件下においては、SiO2が30.2オングストローム/minの速度でエッチングされる。これにより、表面から深さ20nmにおけるO/Si比を測定した。
実施例1〜7及び比較例1〜2の複合磁性粉をエポキシ樹脂中に混錬し、硬化剤を添加した後、熱硬化させることによって測定用サンプルを作製した。次に、FIB(集束イオンビーム)装置を用いて測定用サンプルを切断することによって薄片を切り出し、TEM(透過電子顕微鏡)のサンプルホルダー上に薄片を固定した。さらに、FIBを用いて薄片の厚みを約100nmまで薄くした後、STEM(走査透過電子顕微鏡)を用いて20万倍の画像を得た。得られた画像を解析することにより、Fe粉(画像では黒色)の表面から絶縁層(画像では薄いグレー)の表面方向へ進行したFe−0(画像では濃いグレー)の距離を算出した。体積抵抗率を測定は、複合磁性粉を175℃の環境に300時間放置する耐熱試験を行う前後において行った。
実施例1〜4及び比較例1の複合磁性粉をそれぞれ5g秤量し、三菱ケミカルアナリテック社製のハイレスタUX MCP−HT800の測定冶具に投入した後、直径10mmの測定電極に1Vの電圧を印加し、20kNの圧力を掛けた状態における体積抵抗率を測定した。体積抵抗率を測定は、複合磁性粉を175℃の環境に300時間放置する耐熱試験を行う前後において行った。
評価結果を表1に示す。
4 磁性粉
6 絶縁層
Claims (3)
- 鉄を含む磁性粉の表面が酸化シリコンからなる絶縁層で被覆されてなる複合磁性粉であって、
前記絶縁層を構成する酸化シリコンのO/Si比が2.1以上、2.2以下であることを特徴とする複合磁性粉。 - 請求項1に記載の複合磁性粉と樹脂を含む圧粉磁心。
- 鉄を含む磁性粉が分散された液体にシリコンエトキシドを添加することによって、前記磁性粉の表面を酸化シリコンからなる絶縁層で被覆する工程と、
前記絶縁層で被覆された前記磁性粉を水素を含む雰囲気中で600℃以上、900℃以下で熱処理することによって、前記絶縁層を改質する工程と、を備えることを特徴とする複合磁性粉の製造方法。
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JP2019136714A JP2021021097A (ja) | 2019-07-25 | 2019-07-25 | 複合磁性粉及びこれを用いた圧粉磁心、並びに、複合磁性粉の製造方法 |
KR1020200067103A KR102299348B1 (ko) | 2019-07-25 | 2020-06-03 | 복합 자성분 및 이를 이용한 압분 자심, 및 복합 자성분의 제조방법 |
US16/925,753 US11239013B2 (en) | 2019-07-25 | 2020-07-10 | Composite magnetic powder, powder magnetic core using the same, and manufacturing method for composite magnetic powder |
CN202010721932.0A CN112289537A (zh) | 2019-07-25 | 2020-07-24 | 复合磁性粉及使用其的压粉磁芯、以及复合磁性粉的制造方法 |
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KR20210012897A (ko) | 2021-02-03 |
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US20210027925A1 (en) | 2021-01-28 |
US11239013B2 (en) | 2022-02-01 |
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