EP0258609A3 - Permanent magnet with good thermal stability - Google Patents

Permanent magnet with good thermal stability Download PDF

Info

Publication number
EP0258609A3
EP0258609A3 EP87110634A EP87110634A EP0258609A3 EP 0258609 A3 EP0258609 A3 EP 0258609A3 EP 87110634 A EP87110634 A EP 87110634A EP 87110634 A EP87110634 A EP 87110634A EP 0258609 A3 EP0258609 A3 EP 0258609A3
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
Application number
EP87110634A
Other versions
EP0258609B1 (en
EP0258609A2 (en
Inventor
Masaaki Tokunaga
Minoru Endoh
Hiroshi Kogure
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Proterial Ltd
Original Assignee
Hitachi Metals Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to EP90121313A priority Critical patent/EP0421488B1/en
Publication of EP0258609A2 publication Critical patent/EP0258609A2/en
Publication of EP0258609A3 publication Critical patent/EP0258609A3/en
Application granted granted Critical
Publication of EP0258609B1 publication Critical patent/EP0258609B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
EP87110634A 1986-07-23 1987-07-22 Permanent magnet with good thermal stability Expired - Lifetime EP0258609B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP90121313A EP0421488B1 (en) 1986-07-23 1987-07-22 Permanent magnet with good thermal stability

Applications Claiming Priority (8)

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

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP90121313.2 Division-Into 1987-07-22

Publications (3)

Publication Number Publication Date
EP0258609A2 EP0258609A2 (en) 1988-03-09
EP0258609A3 true EP0258609A3 (en) 1989-04-26
EP0258609B1 EP0258609B1 (en) 1993-02-03

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 After (1)

Application Number Title Priority Date Filing Date
EP90121313A Expired - Lifetime EP0421488B1 (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)

* Cited by examiner, † Cited by third party
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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3514516A1 (en) * 1984-04-24 1985-10-24 Nippon Gakki Seizo K.K., Hamamatsu, Shizuoka Rare-earth magnet, and method for producing it
EP0216254A1 (en) * 1985-09-10 1987-04-01 Kabushiki Kaisha Toshiba Permanent magnet
EP0248981A2 (en) * 1986-06-12 1987-12-16 Kabushiki Kaisha Toshiba Permanent magnet and permanent magnetic alloy

Family Cites Families (12)

* Cited by examiner, † Cited by third party
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
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
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3514516A1 (en) * 1984-04-24 1985-10-24 Nippon Gakki Seizo K.K., Hamamatsu, Shizuoka Rare-earth magnet, and method for producing it
EP0216254A1 (en) * 1985-09-10 1987-04-01 Kabushiki Kaisha Toshiba Permanent magnet
EP0248981A2 (en) * 1986-06-12 1987-12-16 Kabushiki Kaisha Toshiba Permanent magnet and permanent magnetic alloy

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 10, No. 192 (417)[2248] July 5, 1986; & JP-A-61 039 507 (SEIKO INST. & ELECTRONICS LTD.) (25-02-1986) *
PATENT ABSTRACTS OF JAPAN, Vol. 11, No. 117, (E-498)[2564] April 11, 1987; & JP-A-61 263 201 (HITACHI METALS LTD.) (21-11-1986) *

Also Published As

Publication number Publication date
CN1036554C (en) 1997-11-26
DE3750661D1 (en) 1994-11-17
EP0421488B1 (en) 1994-10-12
EP0421488A3 (en) 1991-08-28
EP0258609B1 (en) 1993-02-03
EP0421488A2 (en) 1991-04-10
DE3783975D1 (en) 1993-03-18
DE3783975T2 (en) 1993-05-27
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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