CN101981634B - R-t-b系烧结磁体及其制造方法 - Google Patents
R-t-b系烧结磁体及其制造方法 Download PDFInfo
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- CN101981634B CN101981634B CN2009801111850A CN200980111185A CN101981634B CN 101981634 B CN101981634 B CN 101981634B CN 2009801111850 A CN2009801111850 A CN 2009801111850A CN 200980111185 A CN200980111185 A CN 200980111185A CN 101981634 B CN101981634 B CN 101981634B
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
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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
- H01F1/032—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
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
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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
- H01F41/0253—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
- H01F41/0273—Imparting anisotropy
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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
- B22F2998/10—Processes characterised by the sequence of their steps
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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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
- C22C2202/02—Magnetic
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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
- H01F1/032—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
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
-
- 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
- H01F1/032—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
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0573—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes obtained by reduction or by hydrogen decrepitation or embrittlement
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
Claims (5)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-089914 | 2008-03-31 | ||
JP2008089914 | 2008-03-31 | ||
PCT/JP2009/001448 WO2009122709A1 (ja) | 2008-03-31 | 2009-03-30 | R-t-b系焼結磁石およびその製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN101981634A CN101981634A (zh) | 2011-02-23 |
CN101981634B true CN101981634B (zh) | 2013-06-12 |
Family
ID=41135113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2009801111850A Active CN101981634B (zh) | 2008-03-31 | 2009-03-30 | R-t-b系烧结磁体及其制造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8317941B2 (zh) |
EP (1) | EP2273513B1 (zh) |
JP (1) | JP5477282B2 (zh) |
CN (1) | CN101981634B (zh) |
WO (1) | WO2009122709A1 (zh) |
Families Citing this family (63)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8092619B2 (en) * | 2008-06-13 | 2012-01-10 | Hitachi Metals, Ltd. | R-T-Cu-Mn-B type sintered magnet |
JP2011199069A (ja) * | 2010-03-19 | 2011-10-06 | Tdk Corp | 希土類焼結磁石の製造方法及び希土類焼結磁石用材料 |
JP2011211056A (ja) * | 2010-03-30 | 2011-10-20 | Tdk Corp | 希土類焼結磁石、モーター及び自動車 |
JP5501834B2 (ja) * | 2010-03-31 | 2014-05-28 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
JP2011216720A (ja) * | 2010-03-31 | 2011-10-27 | Nitto Denko Corp | 永久磁石及び永久磁石の製造方法 |
JP5501827B2 (ja) * | 2010-03-31 | 2014-05-28 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
CN102214508B (zh) * | 2010-04-02 | 2014-03-12 | 烟台首钢磁性材料股份有限公司 | R-t-b-m-a系稀土类永磁体以及其制造方法 |
JP5572673B2 (ja) | 2011-07-08 | 2014-08-13 | 昭和電工株式会社 | R−t−b系希土類焼結磁石用合金、r−t−b系希土類焼結磁石用合金の製造方法、r−t−b系希土類焼結磁石用合金材料、r−t−b系希土類焼結磁石、r−t−b系希土類焼結磁石の製造方法およびモーター |
JP5910437B2 (ja) * | 2011-09-28 | 2016-04-27 | 住友金属鉱山株式会社 | Cu含有希土類−鉄−硼素系合金粉末とその製造方法 |
JP5969750B2 (ja) * | 2011-10-14 | 2016-08-17 | 日東電工株式会社 | 希土類永久磁石の製造方法 |
CN102436893B (zh) * | 2011-12-15 | 2016-04-27 | 钢铁研究总院 | 一种无Tb少Dy的高矫顽力磁体及制备方法 |
JP2013197240A (ja) * | 2012-03-19 | 2013-09-30 | Jx Nippon Mining & Metals Corp | Nd−Fe−B系希土類焼結磁石及びその製造方法。 |
US8907755B2 (en) * | 2012-03-30 | 2014-12-09 | Toda Kogyo Corporation | R-T-B-based rare earth magnet particles, process for producing the R-T-B- based rare earth magnet particles, and bonded magnet |
CN103357872A (zh) * | 2012-06-12 | 2013-10-23 | 北京京磁强磁材料有限公司 | 一种钕铁硼磁体的烧结工艺 |
CN102842419B (zh) * | 2012-09-12 | 2015-01-14 | 厦门钨业股份有限公司 | 烧结钕-铁-硼磁铁的制作方法及其装置 |
US20150239048A1 (en) * | 2012-09-12 | 2015-08-27 | Xiamen Tungsten Co., Ltd. | Manufacturing method of rare earth magnet alloy powder, rare earth magnet and a powder making device |
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JP6202722B2 (ja) * | 2012-12-06 | 2017-09-27 | 昭和電工株式会社 | R−t−b系希土類焼結磁石、r−t−b系希土類焼結磁石の製造方法 |
CN103050267B (zh) * | 2012-12-31 | 2016-01-20 | 厦门钨业股份有限公司 | 一种基于细粉热处理的烧结Nd-Fe-B系磁铁制作方法 |
CN103050268B (zh) * | 2012-12-31 | 2016-01-20 | 厦门钨业股份有限公司 | 基于细粉蒸着热处理的烧结Nd-Fe-B系磁铁制作方法 |
JP6238444B2 (ja) * | 2013-01-07 | 2017-11-29 | 昭和電工株式会社 | R−t−b系希土類焼結磁石、r−t−b系希土類焼結磁石用合金およびその製造方法 |
JP6265368B2 (ja) * | 2013-04-22 | 2018-01-24 | 昭和電工株式会社 | R−t−b系希土類焼結磁石およびその製造方法 |
EP3790029A1 (en) * | 2013-06-17 | 2021-03-10 | Urban Mining Technology Company, LLC | Magnet recycling to create nd-fe-b magnets with improved or restored magnetic performance |
CN103578702B (zh) * | 2013-06-19 | 2016-04-27 | 浙江东阳东磁有限公司 | 一种径向磁环及其制备方法 |
JP6229938B2 (ja) * | 2013-11-26 | 2017-11-15 | 日立金属株式会社 | R−t−b系焼結磁石 |
CN109065313A (zh) * | 2014-03-27 | 2018-12-21 | 日立金属株式会社 | R-t-b系合金粉末及其制造方法、以及r-t-b系烧结磁铁及其制造方法 |
CN104952574A (zh) * | 2014-03-31 | 2015-09-30 | 厦门钨业股份有限公司 | 一种含W的Nd-Fe-B-Cu系烧结磁铁 |
US9336932B1 (en) | 2014-08-15 | 2016-05-10 | Urban Mining Company | Grain boundary engineering |
EP3185252A4 (en) * | 2014-08-18 | 2017-08-30 | Intermetallics Co. Ltd. | RFeB-BASED SINTERED MAGNET |
US10418171B2 (en) * | 2014-12-12 | 2019-09-17 | Hitachi Metals, Ltd. | Production method for R—T—B-based sintered magnet |
WO2016093174A1 (ja) * | 2014-12-12 | 2016-06-16 | 日立金属株式会社 | R-t-b系焼結磁石の製造方法 |
JP6572550B2 (ja) * | 2015-02-04 | 2019-09-11 | Tdk株式会社 | R−t−b系焼結磁石 |
DE112016001436T5 (de) * | 2015-03-27 | 2017-12-21 | Hitachi Metals, Ltd. | Gesinterter R-TM-B Magnet |
AU2016253743B2 (en) * | 2015-04-30 | 2018-12-20 | Ihi Corporation | Rare earth permanent magnet and method for producing rare earth permanent magnet |
CN107710351B (zh) * | 2015-06-25 | 2019-10-25 | 日立金属株式会社 | R-t-b系烧结磁体及其制造方法 |
JP6488976B2 (ja) * | 2015-10-07 | 2019-03-27 | Tdk株式会社 | R−t−b系焼結磁石 |
EP3179487B1 (en) * | 2015-11-18 | 2021-04-28 | Shin-Etsu Chemical Co., Ltd. | R-(fe,co)-b sintered magnet and making method |
JP6578916B2 (ja) * | 2015-12-03 | 2019-09-25 | Tdk株式会社 | R−t−b系希土類焼結磁石用合金の製造方法およびr−t−b系希土類焼結磁石の製造方法 |
JP6645219B2 (ja) * | 2016-02-01 | 2020-02-14 | Tdk株式会社 | R−t−b系焼結磁石用合金、及びr−t−b系焼結磁石 |
US10943717B2 (en) | 2016-02-26 | 2021-03-09 | Tdk Corporation | R-T-B based permanent magnet |
US10784028B2 (en) | 2016-02-26 | 2020-09-22 | Tdk Corporation | R-T-B based permanent magnet |
CN108701517B (zh) * | 2016-03-17 | 2020-07-24 | 日立金属株式会社 | R-t-b系烧结磁体的制造方法 |
JP2018059197A (ja) * | 2016-09-30 | 2018-04-12 | 日立金属株式会社 | R−tm−b系焼結磁石 |
JP2018093201A (ja) * | 2016-12-06 | 2018-06-14 | Tdk株式会社 | R−t−b系永久磁石 |
CN108154988B (zh) * | 2016-12-06 | 2020-10-23 | Tdk株式会社 | R-t-b系永久磁铁 |
CN108154987B (zh) * | 2016-12-06 | 2020-09-01 | Tdk株式会社 | R-t-b系永久磁铁 |
JP6702215B2 (ja) * | 2017-02-02 | 2020-05-27 | 日立金属株式会社 | R−t−b系焼結磁石 |
PH12017000178A1 (en) * | 2017-06-20 | 2019-01-14 | Shinetsu Chemical Co | R-fe-b sintered magnet and making method |
DE102017116272A1 (de) * | 2017-07-19 | 2019-01-24 | Netzsch Trockenmahltechnik Gmbh | Verfahren und anlage zur herstellung eines ausgangsmaterials für die herstellung von seltenerdmagneten |
CN107457407B (zh) * | 2017-07-21 | 2019-06-04 | 湖南众鑫新材料科技股份有限公司 | 一种氮化钒铁的破碎方法 |
CN107658088A (zh) * | 2017-10-23 | 2018-02-02 | 安徽中磁高科有限公司 | 一种烧结钕铁硼永磁体的制备工艺 |
JP2019102707A (ja) * | 2017-12-05 | 2019-06-24 | Tdk株式会社 | R−t−b系永久磁石 |
JP7251916B2 (ja) * | 2017-12-05 | 2023-04-04 | Tdk株式会社 | R-t-b系永久磁石 |
JP7167484B2 (ja) * | 2018-05-17 | 2022-11-09 | Tdk株式会社 | R-t-b系希土類焼結磁石用鋳造合金薄片 |
DE102018112406A1 (de) * | 2018-05-24 | 2019-11-28 | Netzsch Trockenmahltechnik Gmbh | Verfahren und Anlage zur Herstellung eines Ausgangsmaterials für die Herstellung von Seltenerd-Magneten |
JP7196468B2 (ja) * | 2018-08-29 | 2022-12-27 | 大同特殊鋼株式会社 | R-t-b系焼結磁石 |
JP2020161788A (ja) * | 2019-03-19 | 2020-10-01 | 日立金属株式会社 | R−t−b系焼結磁石 |
CN110571007B (zh) * | 2019-09-03 | 2021-06-11 | 厦门钨业股份有限公司 | 一种稀土永磁材料、原料组合物、制备方法、应用、电机 |
CN110942878B (zh) * | 2019-12-24 | 2021-03-26 | 厦门钨业股份有限公司 | 一种r-t-b系永磁材料及其制备方法和应用 |
CN111081444B (zh) * | 2019-12-31 | 2021-11-26 | 厦门钨业股份有限公司 | R-t-b系烧结磁体及其制备方法 |
CN111048273B (zh) * | 2019-12-31 | 2021-06-04 | 厦门钨业股份有限公司 | 一种r-t-b系永磁材料、原料组合物、制备方法、应用 |
CN111243810B (zh) * | 2020-02-29 | 2021-08-06 | 厦门钨业股份有限公司 | 一种稀土永磁材料及其制备方法和应用 |
US12023759B2 (en) * | 2022-04-11 | 2024-07-02 | Hrl Laboratories, Llc | Methods for tailoring the magnetic permeability of soft magnets, and soft magnets obtained therefrom |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1272213A (zh) * | 1998-05-26 | 2000-11-01 | 日立金属株式会社 | 氮化型稀土类磁铁材料及由其所制的粘结磁铁 |
CN1698142A (zh) * | 2003-06-30 | 2005-11-16 | Tdk株式会社 | R-t-b系稀土类永磁体及其制造方法 |
CN101111909A (zh) * | 2005-03-14 | 2008-01-23 | Tdk株式会社 | R-t-b系烧结磁体 |
Family Cites Families (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59163802A (ja) | 1983-03-08 | 1984-09-14 | Sumitomo Special Metals Co Ltd | 永久磁石材料 |
JPS59211558A (ja) | 1983-05-14 | 1984-11-30 | Sumitomo Special Metals Co Ltd | 永久磁石材料 |
US4792368A (en) * | 1982-08-21 | 1988-12-20 | Sumitomo Special Metals Co., Ltd. | Magnetic materials and permanent magnets |
US4840684A (en) * | 1983-05-06 | 1989-06-20 | Sumitomo Special Metals Co, Ltd. | Isotropic permanent magnets and process for producing same |
JPS62158854A (ja) * | 1985-12-28 | 1987-07-14 | S C M:Kk | 永久磁石材料 |
JP3059188B2 (ja) | 1990-04-25 | 2000-07-04 | ティーディーケイ株式会社 | 永久磁石の製造方法および永久磁石 |
JPH05205927A (ja) * | 1991-11-22 | 1993-08-13 | Kawasaki Steel Corp | 希土類−遷移金属系永久磁石及びその製造方法 |
US5858123A (en) * | 1995-07-12 | 1999-01-12 | Hitachi Metals, Ltd. | Rare earth permanent magnet and method for producing the same |
JP3242818B2 (ja) * | 1995-07-21 | 2001-12-25 | 昭和電工株式会社 | 希土類磁石用合金及びその製造方法 |
JP3693838B2 (ja) * | 1999-01-29 | 2005-09-14 | 信越化学工業株式会社 | 希土類磁石用合金薄帯、合金微粉末及びそれらの製造方法 |
JP4600627B2 (ja) * | 2001-06-14 | 2010-12-15 | 信越化学工業株式会社 | 希土類永久磁石の製造方法 |
CN1306527C (zh) * | 2001-12-18 | 2007-03-21 | 昭和电工株式会社 | 用于稀土磁体的合金薄片及其生产方法、用于稀土烧结磁体的合金粉末、稀土烧结磁体、用于结合磁体的合金粉末和结合磁体 |
JP4479944B2 (ja) * | 2001-12-18 | 2010-06-09 | 昭和電工株式会社 | 希土類磁石用合金薄片およびその製造方法 |
US7199690B2 (en) * | 2003-03-27 | 2007-04-03 | Tdk Corporation | R-T-B system rare earth permanent magnet |
JP3728316B2 (ja) | 2004-01-08 | 2005-12-21 | Tdk株式会社 | R−t−b系希土類永久磁石 |
JP2004303909A (ja) * | 2003-03-31 | 2004-10-28 | Tdk Corp | 希土類永久磁石の製造方法、希土類永久磁石 |
JP3683260B2 (ja) * | 2003-06-27 | 2005-08-17 | Tdk株式会社 | 希土類永久磁石 |
JP4370877B2 (ja) * | 2003-10-29 | 2009-11-25 | 日立金属株式会社 | 永久磁石粉末の配向方法および永久磁石の製造方法 |
JP2005197300A (ja) * | 2003-12-26 | 2005-07-21 | Tdk Corp | 希土類焼結磁石及びその製造方法 |
JP2005197301A (ja) * | 2003-12-26 | 2005-07-21 | Tdk Corp | 希土類焼結磁石及びその製造方法 |
JP4329595B2 (ja) * | 2004-03-31 | 2009-09-09 | 日立金属株式会社 | 希土類磁石粉末およびそれを用いたコンパウンドならびにそれを用いたボンド磁石 |
JP2006165008A (ja) * | 2004-12-02 | 2006-06-22 | Tdk Corp | R−t−b系焼結磁石の製造方法 |
JP2006270087A (ja) | 2005-02-28 | 2006-10-05 | Tdk Corp | 希土類焼結磁石の製造方法 |
TWI413136B (zh) * | 2005-03-23 | 2013-10-21 | Shinetsu Chemical Co | 稀土族永久磁體 |
JP4702546B2 (ja) * | 2005-03-23 | 2011-06-15 | 信越化学工業株式会社 | 希土類永久磁石 |
JP2006100847A (ja) | 2005-11-14 | 2006-04-13 | Tdk Corp | R−t−b系希土類永久磁石 |
JP4283802B2 (ja) | 2005-12-28 | 2009-06-24 | インターメタリックス株式会社 | NdFeB系焼結磁石の製造方法 |
US8092619B2 (en) * | 2008-06-13 | 2012-01-10 | Hitachi Metals, Ltd. | R-T-Cu-Mn-B type sintered magnet |
-
2009
- 2009-03-30 EP EP09727377.5A patent/EP2273513B1/en active Active
- 2009-03-30 WO PCT/JP2009/001448 patent/WO2009122709A1/ja active Application Filing
- 2009-03-30 US US12/935,318 patent/US8317941B2/en active Active
- 2009-03-30 CN CN2009801111850A patent/CN101981634B/zh active Active
- 2009-03-30 JP JP2010505384A patent/JP5477282B2/ja active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1272213A (zh) * | 1998-05-26 | 2000-11-01 | 日立金属株式会社 | 氮化型稀土类磁铁材料及由其所制的粘结磁铁 |
CN1698142A (zh) * | 2003-06-30 | 2005-11-16 | Tdk株式会社 | R-t-b系稀土类永磁体及其制造方法 |
CN101111909A (zh) * | 2005-03-14 | 2008-01-23 | Tdk株式会社 | R-t-b系烧结磁体 |
Non-Patent Citations (4)
Title |
---|
JP特开2002-373822A 2002.12.26 |
JP特开2005-136015A 2005.05.26 |
JP特开2006-270087A 2006.10.05 |
JP特开2006-303433A 2006.11.02 |
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US8317941B2 (en) | 2012-11-27 |
CN101981634A (zh) | 2011-02-23 |
WO2009122709A1 (ja) | 2009-10-08 |
EP2273513B1 (en) | 2019-10-16 |
EP2273513A1 (en) | 2011-01-12 |
US20110025440A1 (en) | 2011-02-03 |
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JP5477282B2 (ja) | 2014-04-23 |
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