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GB1280538A - Improvements in permanent magnet material powders - Google Patents

Improvements in permanent magnet material powders

Info

Publication number
GB1280538A
GB1280538A GB31677/69A GB3167769A GB1280538A GB 1280538 A GB1280538 A GB 1280538A GB 31677/69 A GB31677/69 A GB 31677/69A GB 3167769 A GB3167769 A GB 3167769A GB 1280538 A GB1280538 A GB 1280538A
Authority
GB
United Kingdom
Prior art keywords
zinc
powder
magnetic
june
heated
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
GB31677/69A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB1280538A publication Critical patent/GB1280538A/en
Expired 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

1280538 Magnetic compositions GENERAL ELECTRIC CO 23 June 1969 [21 June 1968] 31677/69 Heading H1H [Also in Division C7] A magnetic powder is prepared by treating particles of a cobalt-rare earth compound with zinc or arsenic in liquid or vapour form. The compound is for example Co 5 Y, Co 5 Sm, or Co 5 M where M is cerium-rich mischmetal. The powder may be treated first with a mixture of acids and then mixed with zinc and heated; alternatively the powder may be heated in a quartz tube on the inside wall of which zinc is deposited. Heating takes place in a vacuum or in a stream of hydrogen or helium. The zinc or arsenic forms a film on the surface of the particles or diffuses into the surface and so stabilizes the magnetic properties, especially the coercive force. The powder may be bonded with epoxy resin, elastomers, or non-magnetic metals to form permanent magnets.
GB31677/69A 1968-06-21 1969-06-23 Improvements in permanent magnet material powders Expired GB1280538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73880968A 1968-06-21 1968-06-21

Publications (1)

Publication Number Publication Date
GB1280538A true GB1280538A (en) 1972-07-05

Family

ID=24969579

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31677/69A Expired GB1280538A (en) 1968-06-21 1969-06-23 Improvements in permanent magnet material powders

Country Status (2)

Country Link
US (1) US3615914A (en)
GB (1) GB1280538A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2387500A1 (en) * 1977-04-15 1978-11-10 Magnetic Polymers Ltd RARE EARTH ALLOY MAGNETS

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4115159A (en) * 1969-08-08 1978-09-19 Th. Goldschmidt Ag Method of increasing the coercive force of pulverized rare earth-cobalt alloys
US4063971A (en) * 1969-08-08 1977-12-20 Th. Goldschmidt Ag Method of increasing the coercive force of pulverized rare earth-cobalt alloys
US3844850A (en) * 1972-04-17 1974-10-29 Gen Electric Large grain cobalt-samarium intermetallic permanent magnet material and process
US3856581A (en) * 1973-06-22 1974-12-24 Gen Electric Annealing air-stable magnetic materials having superior magnetic characteristics and method
US3892600A (en) * 1973-06-22 1975-07-01 Gen Electric Annealed coated air-stable cobalt-rare earth alloy particles
US3856580A (en) * 1973-06-22 1974-12-24 Gen Electric Air-stable magnetic materials and method
US3892601A (en) * 1973-06-22 1975-07-01 Gen Electric Coated air-stable cobalt-rare earth alloy particles and method
US3856582A (en) * 1973-06-22 1974-12-24 Gen Electric Fabrication of matrix bonded transition metal-rare earth alloy magnets
US3853640A (en) * 1973-06-22 1974-12-10 Gen Electric Lubricants for pressing transition metal-rare earth powder to be sintered
US3892599A (en) * 1973-06-22 1975-07-01 Gen Electric Air-stable compact of cobalt-rare earth alloy particles and method
CA1215223A (en) * 1983-07-04 1986-12-16 Tokuji Abe Composition for plastic magnets
US6491844B1 (en) * 2001-06-29 2002-12-10 Sandia National Laboratories Self regulating formulations for safe hydrogen gettering
CN109346261B (en) * 2018-11-14 2020-08-14 山西宇欣磁业有限公司 Ferro-aluminum magnetic material with high cerium content and smelting method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2387500A1 (en) * 1977-04-15 1978-11-10 Magnetic Polymers Ltd RARE EARTH ALLOY MAGNETS

Also Published As

Publication number Publication date
US3615914A (en) 1971-10-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years