JPS5511339A - Permanent magnet - Google Patents

Permanent magnet

Info

Publication number
JPS5511339A
JPS5511339A JP8377778A JP8377778A JPS5511339A JP S5511339 A JPS5511339 A JP S5511339A JP 8377778 A JP8377778 A JP 8377778A JP 8377778 A JP8377778 A JP 8377778A JP S5511339 A JPS5511339 A JP S5511339A
Authority
JP
Japan
Prior art keywords
powder
subjected
rare earth
resin
forced
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.)
Pending
Application number
JP8377778A
Other languages
Japanese (ja)
Inventor
Ichikazu Kasai
Toshiharu Suzuki
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP8377778A priority Critical patent/JPS5511339A/en
Publication of JPS5511339A publication Critical patent/JPS5511339A/en
Pending 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
    • H01F1/0551—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0552—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 in the form of particles, e.g. rapid quenched powders or ribbon flakes with a protective layer

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE:To obtain high retentivity, by setting the value of Z in a specified range in the rare earth transition metal compound to be expressed by R.Mz. CONSTITUTION:The surface of particles of rare earth transition metal compound is subjected to forced treatment, and thereby, powder is obtained in which either one of oxide, sulfide and nitride layers is formed. A permanent magnet is made by using this powder and as adhesive less than 50% in volume of resin, or non- magnetic metal, or alloy. Here, R: one or ore rare earth elements, M: Co or alloy whose major ingredient is Co, Z: 6.5-8.8. For example, a cast lump of ratio Sm(Co, Fe, Cu)8.1 is subjected to heat treatment, rough crushing, melting by heat treatment, tempering and pulverization. Then, the surface of powder is subjected to forced nitrification. Next, the powder is mixed with 20% epoxy resin. This is shaped in a magnetic field, and the resin is polymerized and solidified, and thereby a magnet is obtained. By this, retentivity is greatly increased an energy volume improved.
JP8377778A 1978-07-10 1978-07-10 Permanent magnet Pending JPS5511339A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8377778A JPS5511339A (en) 1978-07-10 1978-07-10 Permanent magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8377778A JPS5511339A (en) 1978-07-10 1978-07-10 Permanent magnet

Publications (1)

Publication Number Publication Date
JPS5511339A true JPS5511339A (en) 1980-01-26

Family

ID=13812033

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8377778A Pending JPS5511339A (en) 1978-07-10 1978-07-10 Permanent magnet

Country Status (1)

Country Link
JP (1) JPS5511339A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5822301A (en) * 1981-07-31 1983-02-09 Mitsubishi Steel Mfg Co Ltd Powder for permanent magnet and manufacture thereof
US4462919A (en) * 1982-04-02 1984-07-31 Sumitomo Bakelite Company, Limited Ferromagnetic resin composition containing polymeric surface precoated magnetic rare earth cobalt powders
WO1991019300A1 (en) * 1990-06-08 1991-12-12 Sps Technologies, Incorporated Improved magnetic materials and process for producing the same
JPH04500887A (en) * 1989-06-13 1992-02-13 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 materials and their manufacturing methods
US5114502A (en) * 1989-06-13 1992-05-19 Sps Technologies, Inc. Magnetic materials and process for producing the same
EP0504391A1 (en) * 1990-10-09 1992-09-23 Iowa State University Research Foundation, Inc. Environmentally stable reactive alloy powders and method of making same
US5227247A (en) * 1989-06-13 1993-07-13 Sps Technologies, Inc. Magnetic materials
US5244510A (en) * 1989-06-13 1993-09-14 Yakov Bogatin Magnetic materials and process for producing the same
US5266128A (en) * 1989-06-13 1993-11-30 Sps Technologies, Inc. Magnetic materials and process for producing the same
US5470400A (en) * 1989-06-13 1995-11-28 Sps Technologies, Inc. Rare earth anisotropic magnetic materials for polymer bonded magnets
JP2007173501A (en) * 2005-12-22 2007-07-05 Hitachi Ltd Pressed powder magnet and rotating machine using it

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5822301A (en) * 1981-07-31 1983-02-09 Mitsubishi Steel Mfg Co Ltd Powder for permanent magnet and manufacture thereof
JPS5911641B2 (en) * 1981-07-31 1984-03-16 三菱製鋼株式会社 Bonded permanent magnet powder and its manufacturing method
US4462919A (en) * 1982-04-02 1984-07-31 Sumitomo Bakelite Company, Limited Ferromagnetic resin composition containing polymeric surface precoated magnetic rare earth cobalt powders
US5244510A (en) * 1989-06-13 1993-09-14 Yakov Bogatin Magnetic materials and process for producing the same
JPH04500887A (en) * 1989-06-13 1992-02-13 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 materials and their manufacturing methods
US5114502A (en) * 1989-06-13 1992-05-19 Sps Technologies, Inc. Magnetic materials and process for producing the same
US5122203A (en) * 1989-06-13 1992-06-16 Sps Technologies, Inc. Magnetic materials
US5227247A (en) * 1989-06-13 1993-07-13 Sps Technologies, Inc. Magnetic materials
US5266128A (en) * 1989-06-13 1993-11-30 Sps Technologies, Inc. Magnetic materials and process for producing the same
US5470400A (en) * 1989-06-13 1995-11-28 Sps Technologies, Inc. Rare earth anisotropic magnetic materials for polymer bonded magnets
WO1991019300A1 (en) * 1990-06-08 1991-12-12 Sps Technologies, Incorporated Improved magnetic materials and process for producing the same
EP0504391A1 (en) * 1990-10-09 1992-09-23 Iowa State University Research Foundation, Inc. Environmentally stable reactive alloy powders and method of making same
JP2007173501A (en) * 2005-12-22 2007-07-05 Hitachi Ltd Pressed powder magnet and rotating machine using it
JP4719568B2 (en) * 2005-12-22 2011-07-06 日立オートモティブシステムズ株式会社 Powder magnet and rotating machine using the same
US8388769B2 (en) 2005-12-22 2013-03-05 Hitachi, Ltd. Powdered-iron magnet and rotating machine using the same

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