JP6419813B2 - マンガンビスマスを含む異方性複合焼結磁石及びその常圧焼結方法 - Google Patents
マンガンビスマスを含む異方性複合焼結磁石及びその常圧焼結方法 Download PDFInfo
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- H01F1/059—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and Va elements, e.g. Sm2Fe17N2
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- H01F1/086—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 hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together sintered
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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
- H01F1/40—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials of magnetic semiconductor materials, e.g. CdCr2S4
- H01F1/401—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials of magnetic semiconductor materials, e.g. CdCr2S4 diluted
- H01F1/404—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials of magnetic semiconductor materials, e.g. CdCr2S4 diluted of III-V type, e.g. In1-x Mnx As
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- 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
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- 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
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- H01F41/028—Radial anisotropy
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Description
急速凝固工程(RSP)は、1984年頃から広く用いられている工程であって、高温の液体状態から常温又は周辺温度の固体状態への転移期間における過熱及び潜熱を含む熱エネルギーの急速な抽出により、固体化したマイクロ構造(微細構造)を形成する過程を意味する。各種の急速凝固工程が開発されて用いられているが、真空誘導溶解法(Vacuum Induction Melting)、高圧鋳造法(squeeze casting)、スプラット急冷法(splat quenching)、溶融紡糸法(melt spinning)、プラナーフローキャスティング法(planar flow casting)、レーザ又は電子ビーム凝固法(laser or electron beam solidification)などが広く活用されており、これらの全てが熱の急速な抽出により固体化したマイクロ構造を形成することを特徴とする。
次の段階は、作製された非磁性相のMnBi系リボンに磁性を付与する段階である。一実施例によれば、磁性付与のために低温熱処理を行うが、例えば、280〜340℃の温度、並びに真空及び不活性ガス雰囲気の条件で低温熱処理を行い、3時間及び24時間熱処理を行うことにより、前記非磁性相のMnBi系リボンに含まれるMnの拡散を誘導して磁性相のMnBi系リボンを形成し、それによりMnBi系磁性体を作製することができる。MnBi低温相(Low Temperature Phase, LTP)を形成するための熱処理により、磁性相が90%以上、より好ましくは95%以上含まれるようにすることができる。MnBi低温相が約90%以上含まれれば、MnBi系磁性体は優れた磁気特性を有することになる。
次の段階として、MnBi低温相のMnBi合金を粉砕してMnBi硬磁性相粉末を準備する。
MnBi硬磁性相と希土類硬磁性相との混合では潤滑剤を用いて磁場成形体を作製することが重要である。後続の焼結段階の前の磁場成形段階において外部圧力を印加して成形するためには、潤滑剤を用いて粉末を混合しなければならない。
本段階においては、外部磁場及び圧力を印加する磁場成形工程を行うことにより、磁場の方向と粉末のC軸方向とを平行に配向させて異方性を確保する。このように磁場成形により一軸方向に異方性を確保した異方性磁石は、等方性磁石と比較して優れた磁気特性を有する。
従来は、ホットプレスなどを用いた急速焼結で高特性の焼結磁石を製造することができたが、本発明において提案した方法を用いれば、常圧焼結で高特性の焼結磁石を製造することができ、従来の焼結磁石工程の熱処理炉を用いることができるという利点がある。
図1の概要図に示すように異方性複合焼結磁石を製造したが、具体的には、まず、MnBiリボンを作製する急速凝固工程(RSP)でホイール速度を60〜70m/sにすることにより、MnBi、Bi相の結晶の大きさが50〜100nmとなるようにMnBiリボンを作製した。
前記製造されたMnBi/SmFeN(30重量%)常圧焼結磁石におけるXPS(X-ray photoelectron spectroscopy)の結果を図5に示した。図5から、残留炭素(C1s)の含有量が37.8at%であり、表面から10nmの厚さで検出されたことが確認された。
MnBi/SmFeN(30重量%)常圧焼結磁石における固有保磁力(HCi)、残留磁束密度(Br)、誘導保磁力(HCB)、密度(Density)及び最大磁気エネルギー積[(BH)max]を示すものとして、磁気特性は、VSM(vibrating sample magnetometer)(Lake Shore #7300 USA、最大25kOe)を用いて常温(25℃)で測定し、その値を下記表1と図3及び図4に示した。
Claims (8)
- (a)急速凝固工程(Rapid Solidification Process, RSP)でMnBi系リボンを作製する段階と、
(b)作製された非磁性相のMnBi系リボンを熱処理して磁性相のMnBi系リボンに転移させる段階と、
(c)前記作製された磁性相のリボンを粉砕してMnBi硬磁性相粉末を準備する段階と、
(d)前記MnBi硬磁性相粉末を希土類硬磁性相粉末と潤滑剤の存在下で混合する段階と、
(e)外部磁場及び圧力を印加して前記混合物を磁場成形する段階と、
(f)前記成形物を常圧焼結する段階とを含み、
前記段階(a)で作製されたMnBi系リボンは、結晶粒の大きさが50〜100nmであることを特徴とするMnBiを含む異方性複合焼結磁石の常圧焼結製造方法。 - 前記潤滑剤は、エチルブチレート、メチルカプリレート、メチルラウレート及びステアレートからなる群から選択されることを特徴とする請求項1に記載の方法。
- 前記段階(e)で印加される圧力は、300〜1000Mpaであることを特徴とする請求項1に記載の方法。
- 前記常圧焼結は、200〜500℃で1分〜5時間、常圧焼結炉で行われることを特徴とする請求項1に記載の方法。
- 前記急速凝固工程でのホイール速度は、60〜70m/sであることを特徴とする請求項1に記載の方法。
- 前記段階(b)でのMnBi合金リボンの熱処理は、280〜340℃の温度で行われることを特徴とする請求項1に記載の方法。
- MnBi硬磁性相粉末の大きさは0.5〜5μmであり、希土類硬磁性相粉末の大きさは1〜5μmであることを特徴とする請求項1に記載の方法。
- MnBiリボンの粉砕工程(c)中に、オレイン酸(C18H34O2)、オレイルアミン(C18H37N)、ポリビニルピロリドン及びポリソルベートからなる群から選択される分散剤を用いることを特徴とする請求項1に記載の方法。
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KR1020150055389A KR101585479B1 (ko) | 2015-04-20 | 2015-04-20 | MnBi를 포함한 이방성 복합 소결 자석 및 이의 상압소결 방법 |
KR10-2015-0055389 | 2015-04-20 | ||
PCT/KR2015/006495 WO2016171321A1 (ko) | 2015-04-20 | 2015-06-25 | 망간비스무트를 포함한 이방성 복합 소결 자석 및 이의 상압소결 방법 |
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US (1) | US10741314B2 (ja) |
EP (1) | EP3288043B1 (ja) |
JP (1) | JP6419813B2 (ja) |
KR (1) | KR101585479B1 (ja) |
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KR101585478B1 (ko) * | 2014-12-15 | 2016-01-15 | 엘지전자 주식회사 | 자기적 특성이 향상된 MnBi를 포함한 이방성 복합 소결 자석 및 이의 제조방법 |
KR101585483B1 (ko) | 2015-04-29 | 2016-01-15 | 엘지전자 주식회사 | 열적 안정성이 향상된 MnBi계 소결자석 및 이들의 제조 방법 |
KR101733172B1 (ko) | 2016-05-30 | 2017-05-08 | 성림첨단산업(주) | 희토류 자석의 제조방법 |
JP2019167569A (ja) * | 2018-03-22 | 2019-10-03 | Ntn株式会社 | 機械部品およびその製造方法 |
JP7076740B2 (ja) * | 2019-04-05 | 2022-05-30 | 国立研究開発法人産業技術総合研究所 | Sm-Fe-N系磁石粉末、Sm-Fe-N系焼結磁石およびその製造方法 |
EP3862110A1 (en) * | 2020-02-07 | 2021-08-11 | EPoS S.r.L. | Composite magnetic materials and method of manufacturing the same |
US20210304933A1 (en) * | 2020-03-24 | 2021-09-30 | Iowa State University Research Foundation, Inc. | Synthesis of high purity manganese bismuth powder and fabrication of bulk permanent magnet |
CN112635145B (zh) * | 2021-01-13 | 2024-03-05 | 中国计量大学 | 一种复合磁粉的制备方法 |
CN113517124A (zh) * | 2021-04-22 | 2021-10-19 | 中国计量大学 | 一种高性能各向异性无稀土永磁体的制备方法 |
CN113593878A (zh) * | 2021-07-06 | 2021-11-02 | 中国计量大学 | 一种制备纳米级高性能Nd2Fe14B/MnBi复合磁体材料的方法 |
CN114597012A (zh) * | 2021-12-14 | 2022-06-07 | 杭州永磁集团有限公司 | 一种高低温相含量的MnBi合金磁性粉末的制备方法 |
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---|---|---|---|---|
US5238753A (en) * | 1989-11-21 | 1993-08-24 | Fuji Photo Film Co., Ltd. | Magnetic recording medium kubbed with a super hard alloy blade containing tungsten carbide power and cobalt |
WO1995028718A1 (fr) | 1994-04-14 | 1995-10-26 | Hitachi Maxell, Ltd. | Poudre magnetique, sa fabrication et son utilisation |
JP3488761B2 (ja) * | 1994-04-14 | 2004-01-19 | 日立マクセル株式会社 | 磁性粉末およびその製造方法、並びにこの製造方法で得られた磁性粉末を用いた磁気記録媒体とこの磁気記録媒体の記録再生方法および記録再生装置 |
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US6979409B2 (en) | 2003-02-06 | 2005-12-27 | Magnequench, Inc. | Highly quenchable Fe-based rare earth materials for ferrite replacement |
JP4968519B2 (ja) * | 2007-04-06 | 2012-07-04 | Necトーキン株式会社 | 永久磁石およびその製造方法 |
JP2008282959A (ja) * | 2007-05-10 | 2008-11-20 | Toyota Motor Corp | 磁性ナノ粒子の製造方法 |
FR2934920A1 (fr) * | 2008-08-08 | 2010-02-12 | Centre Nat Rech Scient | Aimants permanents |
CN102282279B (zh) * | 2009-01-16 | 2013-10-02 | 日立金属株式会社 | R-t-b系烧结磁铁的制造方法 |
WO2012159096A2 (en) | 2011-05-18 | 2012-11-22 | The Regents Of The University Of California | Nanostructured high-strength permanent magnets |
CN102360918A (zh) * | 2011-08-17 | 2012-02-22 | 华南理工大学 | 一种粘结复合磁体及其制备方法 |
KR102043951B1 (ko) | 2013-09-24 | 2019-11-12 | 엘지전자 주식회사 | 층구조를 갖는 경연자성 복합 자석 및 이의 제조방법 |
US20150325349A1 (en) * | 2014-05-07 | 2015-11-12 | Siemens Aktiengesellschaft | HIGH PERFORMANCE PERMANENT MAGNET BASED ON MnBi AND METHOD TO MANUFACTURE SUCH A MAGNET |
KR101535487B1 (ko) | 2014-07-29 | 2015-07-09 | 엘지전자 주식회사 | Mn-Bi계 자성체, 이의 제조방법, Mn-Bi계 소결자석 및 이의 제조방법 |
KR101585478B1 (ko) * | 2014-12-15 | 2016-01-15 | 엘지전자 주식회사 | 자기적 특성이 향상된 MnBi를 포함한 이방성 복합 소결 자석 및 이의 제조방법 |
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