GB1378195A - Permanent magnet materials - Google Patents

Permanent magnet materials

Info

Publication number
GB1378195A
GB1378195A GB2553772A GB2553772A GB1378195A GB 1378195 A GB1378195 A GB 1378195A GB 2553772 A GB2553772 A GB 2553772A GB 2553772 A GB2553772 A GB 2553772A GB 1378195 A GB1378195 A GB 1378195A
Authority
GB
United Kingdom
Prior art keywords
permanent magnet
particles
component
mixture
magnetization component
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
GB2553772A
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Priority to GB2553772A priority Critical patent/GB1378195A/en
Publication of GB1378195A publication Critical patent/GB1378195A/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
    • H01F1/0555—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

1378195 Ferrite magnets DEFENCE SECRETARY OF STATE FOR 8 June 1973 [31 May 1972] 25537/72 Heading C1J [Also in Division H1] A permanent magnet is compacted of a pressure sintered mixture of a particulate high coercivity component and a particulate high magnetization component of particle size less than 10 microns. The high coercivity particles may be RCO 5 wherein R is a rare earth or an alloy of the same; preferentially Sm, PrSm, LaSm, CeSm, CuCe or Cu-Mischmetall; or alternatively ferromagnetic oxides, e.g. Ba and Sr ferrites; while the high magnetization component may be powdered Fe. The mixture may alternatively contain a binder, e.g. glass, epoxy resin, plastic, wax or rubber, and after hot press compaction may be poled in a strong magnetic field. The particles may be magnetically oriented before compaction, and the hot pressing may be effected in an inert atmosphere, e.g. He
GB2553772A 1973-06-08 1973-06-08 Permanent magnet materials Expired GB1378195A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2553772A GB1378195A (en) 1973-06-08 1973-06-08 Permanent magnet materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2553772A GB1378195A (en) 1973-06-08 1973-06-08 Permanent magnet materials

Publications (1)

Publication Number Publication Date
GB1378195A true GB1378195A (en) 1974-12-27

Family

ID=10229279

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2553772A Expired GB1378195A (en) 1973-06-08 1973-06-08 Permanent magnet materials

Country Status (1)

Country Link
GB (1) GB1378195A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4131495A (en) * 1975-12-02 1978-12-26 Bbc Brown, Boveri & Company, Limited Permanent-magnet alloy
US4192696A (en) * 1975-12-02 1980-03-11 Bbc Brown Boveri & Company Limited Permanent-magnet alloy

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4131495A (en) * 1975-12-02 1978-12-26 Bbc Brown, Boveri & Company, Limited Permanent-magnet alloy
US4192696A (en) * 1975-12-02 1980-03-11 Bbc Brown Boveri & Company Limited Permanent-magnet alloy
US4322257A (en) * 1975-12-02 1982-03-30 Bbc, Brown, Boveri & Company, Limited Permanent-magnet alloy

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee