SE328645B - - Google Patents

Info

Publication number
SE328645B
SE328645B SE170564A SE170564A SE328645B SE 328645 B SE328645 B SE 328645B SE 170564 A SE170564 A SE 170564A SE 170564 A SE170564 A SE 170564A SE 328645 B SE328645 B SE 328645B
Authority
SE
Sweden
Prior art keywords
oersted
magnetic
gauss
feb
die
Prior art date
Application number
SE170564A
Inventor
G Martin
L Walker
Original Assignee
Plessey Uk Ltd
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 Plessey Uk Ltd filed Critical Plessey Uk Ltd
Publication of SE328645B publication Critical patent/SE328645B/xx

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2683—Other ferrites containing alkaline earth metals or lead
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Power Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Magnetic Ceramics (AREA)
  • Compounds Of Iron (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Abstract

1,070,902. Magnetic structures. PLESSEYUK Ltd. Feb. 12, 1964 [Feb. 15, 1963], No. 6203/63. Heading H1H. Sintered magnetic bodies are produced by extruding through a die in which there is a direct continuous or pulsed magnetic field a mixture of magnetic particles and a binder, then applying a second, reverse, magnetic field in the die to demagnetize the body before it leaves the extruder, and then cutting the extruded product as required, and sintering. Both magnetic fields may be produced by the same magnetic circuit, and the second is smaller than the first. A suitable material is barium ferrite (prepared e.g. by calcining at 1300‹ C. a mixture of BaCO 3 and Fe 2 O 3 containing a little SiO 2 and PbO) in cereal flour and methyl cellulose. The fields may be in any direction, and the first is at least 3000 Oersted, and preferably 6000 Oersted, and the second 2000 Oersted. The properties of a magnet made in this way were: B rem = 2800 Gauss; Hc = 2200 Oersted; B.H max = 1À7 x 10<SP>6</SP> Gauss. Oersted.
SE170564A 1963-02-15 1964-02-12 SE328645B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB620363A GB1070902A (en) 1963-02-15 1963-02-15 Improvements in or relating to non-metallic magnetic materials

Publications (1)

Publication Number Publication Date
SE328645B true SE328645B (en) 1970-09-21

Family

ID=9810297

Family Applications (1)

Application Number Title Priority Date Filing Date
SE170564A SE328645B (en) 1963-02-15 1964-02-12

Country Status (3)

Country Link
DE (1) DE1286230B (en)
GB (1) GB1070902A (en)
SE (1) SE328645B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0264065A (en) * 1988-05-24 1990-03-05 Ube Ind Ltd Production of ceramics containing oriented crystal grain
CN103920879A (en) * 2014-02-28 2014-07-16 深圳市磁研科技有限公司 Near-net forming process of rare earth magnetic powder particles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU35823A1 (en) * 1957-04-27

Also Published As

Publication number Publication date
GB1070902A (en) 1967-06-07
DE1286230B (en) 1969-01-02

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