GB821540A - Complex magnetic materials and methods for their manufacture - Google Patents

Complex magnetic materials and methods for their manufacture

Info

Publication number
GB821540A
GB821540A GB25987/56A GB2598756A GB821540A GB 821540 A GB821540 A GB 821540A GB 25987/56 A GB25987/56 A GB 25987/56A GB 2598756 A GB2598756 A GB 2598756A GB 821540 A GB821540 A GB 821540A
Authority
GB
United Kingdom
Prior art keywords
magnetic
iron
metal particles
magnetic material
aug
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
GB25987/56A
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB821540A publication Critical patent/GB821540A/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
    • H01F1/09—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 mixtures of metallic and non-metallic particles; metallic particles having oxide skin

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Magnetic Ceramics (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

821,540. Magnetic compositions. LICENTIA PATENT VERWALTUNGS G.m.b.H. Aug. 24, 1956 [Aug. 24, 1955], No. 25987/66. Class 38 (2). A magnetic material comprising two magnetic components, one being metallic and the other oxidic, is made by oxidizing the surface of metal particles, mixing the particles with oxides or oxide forming substances, and converting the admixture into a magnetic composition into which the oxide coatings are integrated. The metal particles may be of iron or alloys of iron with nickel or cobalt, and oxidized by the action of air and water, or by heating in oxygen or carbon dioxide or steam. The added materials may be oxides, carbonates or oxalates of bivalent metals such as nickel and zinc when a soft magnetic material is desired or of barium, strontium or lead to produce a hard magnetic material. After compressing to a compact body, the mixture is heated to produce by sintering ferrites from the oxide coatings and added materials. The sintering may be in an inert gas such as nitrogen or argon. In producing permanent magnets, the oxidization of the metal particles may be continued until the iron constituents are so small that they exhibit permanent magnetic properties in virtue of their size. Specification 590,392, [Group II], is referred to.
GB25987/56A 1955-08-24 1956-08-24 Complex magnetic materials and methods for their manufacture Expired GB821540A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE821540X 1955-08-24

Publications (1)

Publication Number Publication Date
GB821540A true GB821540A (en) 1959-10-07

Family

ID=6740520

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25987/56A Expired GB821540A (en) 1955-08-24 1956-08-24 Complex magnetic materials and methods for their manufacture

Country Status (1)

Country Link
GB (1) GB821540A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2605615A1 (en) * 1975-02-15 1976-09-02 Tdk Electronics Co Ltd MAGNETIC HEAD

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2605615A1 (en) * 1975-02-15 1976-09-02 Tdk Electronics Co Ltd MAGNETIC HEAD

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