GB1373019A - Cobalt-based sintered permanent magnets - Google Patents

Cobalt-based sintered permanent magnets

Info

Publication number
GB1373019A
GB1373019A GB3930171A GB3930171A GB1373019A GB 1373019 A GB1373019 A GB 1373019A GB 3930171 A GB3930171 A GB 3930171A GB 3930171 A GB3930171 A GB 3930171A GB 1373019 A GB1373019 A GB 1373019A
Authority
GB
United Kingdom
Prior art keywords
rare earth
magnetic field
permanent magnets
cobalt
compact
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.)
Expired
Application number
GB3930171A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3930171A priority Critical patent/GB1373019A/en
Publication of GB1373019A publication Critical patent/GB1373019A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
    • H01F1/0557—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together sintered

Abstract

1373019 Sintered cobalt - rare earth permanent magnets R E JOHNSON and C J FELLOWS 28 July 1972 [21 Aug 1971] 39301/71 Heading C7D Two Co-rare earth alloy powders are mixed together in a protective fluid e.g. petroleum ether and the mixture and fluid is loaded into a non magnetic die where it is subjected to a pulsed high magnetic field up to 50KOe for 10 milliseconds and then pressed at up to 3Kb under a low strength magnetic field up to 7KOe. The compact is then repressed with no magnetic field at 2-7Kb e.g. in a rubber sleeve or isostatically and then sintered e.g. at 1000-1200‹C. in argon. After cooling the compact is magnetised in a high strength field. The rare earth component is one or more of Y, La, the lanthanide series including Ce, Pr, Nd, Sm and mischmetal. The two alloys consist of one with 10-20% atomic rare earth metal and the other containing at least 43% atomic rare earth metal and forming 5-15 wt. per cent of the mixture.
GB3930171A 1972-07-28 1972-07-28 Cobalt-based sintered permanent magnets Expired GB1373019A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3930171A GB1373019A (en) 1972-07-28 1972-07-28 Cobalt-based sintered permanent magnets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3930171A GB1373019A (en) 1972-07-28 1972-07-28 Cobalt-based sintered permanent magnets

Publications (1)

Publication Number Publication Date
GB1373019A true GB1373019A (en) 1974-11-06

Family

ID=10408820

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3930171A Expired GB1373019A (en) 1972-07-28 1972-07-28 Cobalt-based sintered permanent magnets

Country Status (1)

Country Link
GB (1) GB1373019A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526994A1 (en) * 1982-05-11 1983-11-18 Draper Lab Charles S Tubular permanent magnets with radial magnetic fields - made by consolidation of compacted rings of ground cobalt and rare earth mixts.
EP0355741A2 (en) * 1988-08-19 1990-02-28 Hitachi Metals, Ltd. Highly oriented permanent magnet and process for producing the same
EP0452580A1 (en) * 1990-04-19 1991-10-23 Seiko Epson Corporation A resin bound magnet and its production process
CN113555175A (en) * 2021-07-15 2021-10-26 福建省长汀卓尔科技股份有限公司 SmCo5Samarium-cobalt permanent magnet material, material for sintered body, preparation method and application thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526994A1 (en) * 1982-05-11 1983-11-18 Draper Lab Charles S Tubular permanent magnets with radial magnetic fields - made by consolidation of compacted rings of ground cobalt and rare earth mixts.
EP0355741A2 (en) * 1988-08-19 1990-02-28 Hitachi Metals, Ltd. Highly oriented permanent magnet and process for producing the same
EP0355741A3 (en) * 1988-08-19 1991-05-22 Hitachi Metals, Ltd. Highly oriented permanent magnet and process for producing the same
US5464670A (en) * 1990-04-13 1995-11-07 Seiko Epson Corporation Resin bound magnet and its production process
EP0452580A1 (en) * 1990-04-19 1991-10-23 Seiko Epson Corporation A resin bound magnet and its production process
CN113555175A (en) * 2021-07-15 2021-10-26 福建省长汀卓尔科技股份有限公司 SmCo5Samarium-cobalt permanent magnet material, material for sintered body, preparation method and application thereof
CN113555175B (en) * 2021-07-15 2023-11-24 福建省长汀卓尔科技股份有限公司 SmCo 5 Samarium cobalt permanent magnet material, sintered body material, preparation method and application thereof

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees