EP0421488A3 - Permanent magnet with good thermal stability - Google Patents
Permanent magnet with good thermal stability Download PDFInfo
- Publication number
- EP0421488A3 EP0421488A3 EP19900121313 EP90121313A EP0421488A3 EP 0421488 A3 EP0421488 A3 EP 0421488A3 EP 19900121313 EP19900121313 EP 19900121313 EP 90121313 A EP90121313 A EP 90121313A EP 0421488 A3 EP0421488 A3 EP 0421488A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- permanent magnet
- thermal stability
- good thermal
- good
- stability
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
Applications Claiming Priority (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP172987/86 | 1986-07-23 | ||
JP17298786 | 1986-07-23 | ||
JP18590586 | 1986-08-07 | ||
JP185905/86 | 1986-08-07 | ||
JP24349086 | 1986-10-14 | ||
JP243490/86 | 1986-10-14 | ||
JP85787/87 | 1987-01-06 | ||
JP85787 | 1987-01-06 | ||
EP87110634A EP0258609B1 (en) | 1986-07-23 | 1987-07-22 | Permanent magnet with good thermal stability |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87110634.0 Division | 1987-07-22 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0421488A2 EP0421488A2 (en) | 1991-04-10 |
EP0421488A3 true EP0421488A3 (en) | 1991-08-28 |
EP0421488B1 EP0421488B1 (en) | 1994-10-12 |
Family
ID=27453258
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87110634A Expired - Lifetime EP0258609B1 (en) | 1986-07-23 | 1987-07-22 | Permanent magnet with good thermal stability |
EP90121313A Expired - Lifetime EP0421488B1 (en) | 1986-07-23 | 1987-07-22 | Permanent magnet with good thermal stability |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87110634A Expired - Lifetime EP0258609B1 (en) | 1986-07-23 | 1987-07-22 | Permanent magnet with good thermal stability |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP0258609B1 (en) |
JP (1) | JP2751109B2 (en) |
KR (1) | KR910001065B1 (en) |
CN (1) | CN1036554C (en) |
DE (2) | DE3783975T2 (en) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4983232A (en) * | 1987-01-06 | 1991-01-08 | Hitachi Metals, Ltd. | Anisotropic magnetic powder and magnet thereof and method of producing same |
JPH01257308A (en) * | 1987-09-09 | 1989-10-13 | Hitachi Metals Ltd | Magnet for voice coil motor |
JPS6472502A (en) * | 1987-09-11 | 1989-03-17 | Hitachi Metals Ltd | Permanent magnet for accelerating particle beam |
US5000800A (en) * | 1988-06-03 | 1991-03-19 | Masato Sagawa | Permanent magnet and method for producing the same |
DE3825358A1 (en) * | 1988-07-26 | 1990-02-01 | Siemens Ag | Magnetic material and method for producing it |
JPH0257662A (en) * | 1988-08-23 | 1990-02-27 | M G:Kk | Rapidly cooled thin strip alloy for bond magnet |
DE3840414A1 (en) * | 1988-11-30 | 1990-05-31 | Siemens Ag | Process for producing a body containing a hard magnetic material |
WO1991014271A1 (en) * | 1990-03-16 | 1991-09-19 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Perromagnetic materials |
US5143560A (en) * | 1990-04-20 | 1992-09-01 | Hitachi Metals, Inc., Ltd. | Method for forming Fe-B-R-T alloy powder by hydrogen decrepitation of die-upset billets |
JPH06509211A (en) * | 1990-06-08 | 1994-10-13 | エスピーエス・テクノロジーズ・インコーポレーテッド | Improved magnetic material and its manufacturing method |
US5405455A (en) * | 1991-06-04 | 1995-04-11 | Shin-Etsu Chemical Co. Ltd. | Rare earth-based permanent magnet |
DE69202515T2 (en) * | 1991-06-04 | 1995-09-21 | Shinetsu Chemical Co | Process for the production of two-phase permanent magnets based on rare earths. |
DE4331563A1 (en) * | 1992-09-18 | 1994-03-24 | Hitachi Metals Ltd | Sintered permanent magnet with good thermal stability - containing defined percentages by weight of specified elements |
US5472525A (en) * | 1993-01-29 | 1995-12-05 | Hitachi Metals, Ltd. | Nd-Fe-B system permanent magnet |
DE19541948A1 (en) * | 1995-11-10 | 1997-05-15 | Schramberg Magnetfab | Magnetic material and permanent magnet of the NdFeB type |
EP1398800B1 (en) * | 2001-06-19 | 2006-04-19 | Mitsubishi Denki Kabushiki Kaisha | Rare earth element permanent magnet material |
AU2002346235A1 (en) * | 2002-06-28 | 2004-01-19 | Aichi Steel Corporation | Alloy for use in bonded magnet, isotropic magnet powder and anisotropic magnet powder and method for production thereof, and bonded magnet |
CN101240398B (en) * | 2007-02-07 | 2010-12-29 | 罗阳 | Intermetallic compound anisotropy magnetic powder, preparation method and special device |
WO2008139556A1 (en) | 2007-05-02 | 2008-11-20 | Hitachi Metals, Ltd. | R-t-b sintered magnet |
EP2034493B1 (en) | 2007-05-02 | 2012-12-05 | Hitachi Metals, Ltd. | R-t-b sintered magnet |
JP5163630B2 (en) * | 2009-12-18 | 2013-03-13 | トヨタ自動車株式会社 | Rare earth magnet and manufacturing method thereof |
US10497497B2 (en) | 2012-02-02 | 2019-12-03 | Santoku Corporation | R-T-B—Ga-based magnet material alloy and method of producing the same |
KR101649433B1 (en) * | 2012-02-23 | 2016-08-19 | 제이엑스금속주식회사 | Neodymium-based rare-earth permanent magnet and process for producing same |
CN103887028B (en) * | 2012-12-24 | 2017-07-28 | 北京中科三环高技术股份有限公司 | A kind of Sintered NdFeB magnet and its manufacture method |
CN104952574A (en) * | 2014-03-31 | 2015-09-30 | 厦门钨业股份有限公司 | Nd-Fe-B-Cu type sintered magnet containing W |
CN104020032A (en) * | 2014-06-17 | 2014-09-03 | 攀钢集团攀枝花钢钒有限公司 | Preparation method of test specimens for unbreakable ferro-vanadium chemical analysis |
CN110148506A (en) * | 2019-04-03 | 2019-08-20 | 宁波同创强磁材料有限公司 | Widen the method for rare-earth permanent magnet sintering temperature window and the preparation method of rare-earth permanent magnet |
CN111627633B (en) * | 2020-06-28 | 2022-05-31 | 福建省长汀金龙稀土有限公司 | R-T-B magnetic material and preparation method thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0216254A1 (en) * | 1985-09-10 | 1987-04-01 | Kabushiki Kaisha Toshiba | Permanent magnet |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1316375C (en) * | 1982-08-21 | 1993-04-20 | Masato Sagawa | Magnetic materials and permanent magnets |
JPS6034005A (en) * | 1983-08-04 | 1985-02-21 | Sumitomo Special Metals Co Ltd | Permanent magnet |
JPS60218455A (en) * | 1984-04-12 | 1985-11-01 | Seiko Epson Corp | Permanent magnetic alloy |
JPS60224761A (en) * | 1984-04-23 | 1985-11-09 | Seiko Epson Corp | Permanent magnet alloy |
JPS60228652A (en) * | 1984-04-24 | 1985-11-13 | Nippon Gakki Seizo Kk | Magnet containing rare earth element and its manufacture |
JPH062930B2 (en) * | 1984-05-14 | 1994-01-12 | セイコーエプソン株式会社 | Rare earth permanent magnet |
JPS60243247A (en) * | 1984-05-15 | 1985-12-03 | Namiki Precision Jewel Co Ltd | Permanent magnet alloy |
JPS6139507A (en) * | 1984-07-30 | 1986-02-25 | Seiko Instr & Electronics Ltd | Neodymium-iron permanent magnet |
JPS61179803A (en) * | 1985-02-05 | 1986-08-12 | Seiko Epson Corp | Production of ferromagnetic resin composition |
JPH0685369B2 (en) * | 1985-05-17 | 1994-10-26 | 日立金属株式会社 | Permanent magnet manufacturing method |
JPS62136551A (en) * | 1985-12-10 | 1987-06-19 | Daido Steel Co Ltd | Permanent magnet material |
EP0248981B1 (en) * | 1986-06-12 | 1993-07-07 | Kabushiki Kaisha Toshiba | Permanent magnet and permanent magnetic alloy |
JPS6318603A (en) * | 1986-07-11 | 1988-01-26 | Toshiba Corp | Permanent magnet |
JP3084975B2 (en) * | 1992-11-06 | 2000-09-04 | 松下電器産業株式会社 | Liquid crystal display cell manufacturing equipment |
-
1987
- 1987-07-22 DE DE8787110634T patent/DE3783975T2/en not_active Expired - Fee Related
- 1987-07-22 EP EP87110634A patent/EP0258609B1/en not_active Expired - Lifetime
- 1987-07-22 EP EP90121313A patent/EP0421488B1/en not_active Expired - Lifetime
- 1987-07-22 DE DE3750661T patent/DE3750661T2/en not_active Expired - Lifetime
- 1987-07-23 JP JP62183881A patent/JP2751109B2/en not_active Expired - Lifetime
- 1987-07-23 CN CN87105186A patent/CN1036554C/en not_active Expired - Lifetime
- 1987-07-23 KR KR1019870008004A patent/KR910001065B1/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0216254A1 (en) * | 1985-09-10 | 1987-04-01 | Kabushiki Kaisha Toshiba | Permanent magnet |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 11, no. 365 (C-460)(2812) 27 November 1987, & JP-A-62 136551 (DAIDO STEEL CO LTD) 19 June 1987, * |
Also Published As
Publication number | Publication date |
---|---|
CN1036554C (en) | 1997-11-26 |
DE3750661D1 (en) | 1994-11-17 |
EP0421488B1 (en) | 1994-10-12 |
EP0258609B1 (en) | 1993-02-03 |
EP0421488A2 (en) | 1991-04-10 |
DE3783975D1 (en) | 1993-03-18 |
DE3783975T2 (en) | 1993-05-27 |
EP0258609A3 (en) | 1989-04-26 |
JPS647503A (en) | 1989-01-11 |
CN87105186A (en) | 1988-02-03 |
KR910001065B1 (en) | 1991-02-23 |
JP2751109B2 (en) | 1998-05-18 |
EP0258609A2 (en) | 1988-03-09 |
KR880002202A (en) | 1988-04-29 |
DE3750661T2 (en) | 1995-04-06 |
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