GB740775A - Improvements in methods of making permanent magnets - Google Patents

Improvements in methods of making permanent magnets

Info

Publication number
GB740775A
GB740775A GB13144/53A GB1314453A GB740775A GB 740775 A GB740775 A GB 740775A GB 13144/53 A GB13144/53 A GB 13144/53A GB 1314453 A GB1314453 A GB 1314453A GB 740775 A GB740775 A GB 740775A
Authority
GB
United Kingdom
Prior art keywords
magnetic
varnish
methods
permanent magnets
field
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
GB13144/53A
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.)
Centre National de la Recherche Scientifique CNRS
Original Assignee
Centre National de la Recherche Scientifique CNRS
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 Centre National de la Recherche Scientifique CNRS filed Critical Centre National de la Recherche Scientifique CNRS
Publication of GB740775A publication Critical patent/GB740775A/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
    • H01F1/10—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
    • H01F1/113—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles in a bonding agent

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

740,775. Magnetic structures. CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE. May 11, 1953 [May 14, 1952], No. 13144/53. Drawings to Specification. Class 38 (2). A permanent magnet is made by impregnating a sintered mixture of iron and cobalt oxides with a liquid which is solidified by heating while a magnetic field is applied to orientate the magnetic elements. Suitable impregnants are phenol - formol, formaldehyde, melamine, glycero-phthalate, ethoxyline and silicone resins, shellac and some natural gums, and .fatty varnishes. It is desirable to choose materials which harden at the most suitable temperature for magnetic orientation. An example is described, in which a ferrite body is impregnated under vacuum followed by pressure with a silicone varnish of high viscosity, the varnish being hardened at 300‹ C. for one hour, while a field of 3000 Oersteds is applied.
GB13144/53A 1952-05-14 1953-05-11 Improvements in methods of making permanent magnets Expired GB740775A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR740775X 1952-05-14

Publications (1)

Publication Number Publication Date
GB740775A true GB740775A (en) 1955-11-16

Family

ID=9135971

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13144/53A Expired GB740775A (en) 1952-05-14 1953-05-11 Improvements in methods of making permanent magnets

Country Status (1)

Country Link
GB (1) GB740775A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1300052B (en) * 1963-01-25 1969-07-24 Westinghouse Electric Corp Method of manufacturing a ferrite permanent magnet of high coercive force
GB2128849A (en) * 1982-10-14 1984-05-02 Bestobell Transducer element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1300052B (en) * 1963-01-25 1969-07-24 Westinghouse Electric Corp Method of manufacturing a ferrite permanent magnet of high coercive force
GB2128849A (en) * 1982-10-14 1984-05-02 Bestobell Transducer element

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