JP7076740B2 - 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 - Google Patents
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 Download PDFInfo
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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
- H01F1/032—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
- H01F1/04—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
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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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- 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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Description
本実施形態は、Sm-Fe-N系磁石粉末およびその製造方法に関する。
本実施形態は、Sm-Fe-N系焼結磁石およびその製造方法に関する。なお、特に断りのない限り、実施形態1の説明が本実施形態にも当て嵌まり得る。
以下の手順により、Sm-Fe-N系磁石粉末を作製した。
以下の手順により、Sm-Fe-N系磁石粉末を磁場中で配向および成形した後、熱処理して焼結し、Sm-Fe-N系焼結磁石を得た。
ガス循環型酸素水分精製器を接続したグローブボックス内でSm-Fe-N系磁石粉末を0.5g秤量し、5mm角の断面内径寸法を有する超硬合金製ダイセットに充填した。これに2Tの静磁場を印加して配向させた状態で、油圧ハンドプレスにより1.2GPaの圧力でプレスして圧粉体を作製した。
上記圧粉体を大気暴露させずに、サーボ制御型プレス装置による加圧機構を備えたパルス通電焼結機まで移送した。次に、パルス通電焼結機内を2Pa(絶対圧力)以下の真空(実質的に酸素が存在しない状態)に保ったまま1.2GPaの圧力でプレスし、この圧力を保持したまま、表4に示す焼結温度にて1分間の通電焼結を行った。これにより、Sm-Fe-N系焼結磁石を得た。
Claims (6)
- Sm-Fe-N系磁性材料の粉末を含み、該粉末の平均粒径が5μm以下であり、該粉末の粒径が0.04μm以上であり、かつX線回折プロファイルにおける(220)面の回折ピークの半値幅が0.0033Å以下である、Sm-Fe-N系磁石粉末。
- 前記粉末の平均粒径が3μm以下である、請求項1に記載のSm-Fe-N系磁石粉末。
- Sm-Fe-N系磁性材料の焼結体を含み、該Sm-Fe-N系磁性材料の結晶粒子の平均粒径が5μm以下であり、該結晶粒子の粒径が0.04μm以上であり、かつX線回折プロファイルにおける(220)面の回折ピークの半値幅が0.0033Å以下である、Sm-Fe-N系焼結磁石。
- 前記X線回折プロファイルにおける(220)面の回折ピークの半値幅が0.0026Å以下である、請求項3に記載のSm-Fe-N系焼結磁石。
- 酸素含有率が0.7質量%以下である、請求項3または4に記載のSm-Fe-N系焼結磁石。
- 請求項1または2に記載のSm-Fe-N系磁石粉末を、酸素濃度10ppm以下の雰囲気下で加圧焼結することにより、請求項3~5のいずれかに記載のSm-Fe-N系焼結磁石を製造する方法。
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JP2019072903 | 2019-04-05 | ||
JP2019072903 | 2019-04-05 | ||
PCT/JP2020/013947 WO2020203739A1 (ja) | 2019-04-05 | 2020-03-27 | 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 |
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JP7076740B2 true JP7076740B2 (ja) | 2022-05-30 |
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JP (1) | JP7076740B2 (ja) |
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WO2018163967A1 (ja) | 2017-03-10 | 2018-09-13 | 国立研究開発法人産業技術総合研究所 | Sm-Fe-N系結晶粒子を含む磁石粉末およびそれから製造される焼結磁石ならびにそれらの製造方法 |
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JPH09298108A (ja) * | 1996-05-07 | 1997-11-18 | Matsushita Electric Ind Co Ltd | 希土類−鉄−窒素系磁性材料の製造方法 |
JP3777793B2 (ja) * | 1998-05-13 | 2006-05-24 | 日亜化学工業株式会社 | 希土類金属−鉄−窒素系磁性材料の製造方法 |
JP2004303881A (ja) | 2003-03-31 | 2004-10-28 | Hitachi Metals Ltd | R−t−n系磁石粉末の製造方法 |
CN1202537C (zh) * | 2003-07-21 | 2005-05-18 | 北京科技大学 | 一种用机械合金化制备钐铁氮永磁材料的方法 |
JP6176712B2 (ja) * | 2013-06-19 | 2017-08-09 | 株式会社村田製作所 | 希土類磁石粉末 |
WO2015198396A1 (ja) | 2014-06-24 | 2015-12-30 | 日産自動車株式会社 | 希土類磁石成形体の製造方法 |
KR101585479B1 (ko) * | 2015-04-20 | 2016-01-15 | 엘지전자 주식회사 | MnBi를 포함한 이방성 복합 소결 자석 및 이의 상압소결 방법 |
JP6578971B2 (ja) * | 2015-08-25 | 2019-09-25 | 住友金属鉱山株式会社 | 希土類元素を含む鉄系合金微粉末の製造方法、希土類元素を含む鉄系合金微粉末 |
JP6614647B2 (ja) * | 2015-09-11 | 2019-12-04 | 国立研究開発法人産業技術総合研究所 | サマリウム−鉄−窒素系焼結磁石、及びサマリウム−鉄−窒素系焼結磁石の製造方法 |
JP2017203200A (ja) * | 2016-05-13 | 2017-11-16 | 住友金属鉱山株式会社 | 希土類−遷移金属系合金粉末の製造方法 |
JP7059563B2 (ja) | 2017-10-13 | 2022-04-26 | 大日本印刷株式会社 | プリフォームの製造方法 |
CN108831659B (zh) * | 2018-09-10 | 2020-08-25 | 重庆科技学院 | 一种制备纳米钕铁氮永磁粉末的方法及纳米永磁粉 |
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US20220037065A1 (en) | 2022-02-03 |
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