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GB839860A - Improvements in or relating to ferromagnetic ferrite materials - Google Patents

Improvements in or relating to ferromagnetic ferrite materials

Info

Publication number
GB839860A
GB839860A GB24172/56A GB2417256A GB839860A GB 839860 A GB839860 A GB 839860A GB 24172/56 A GB24172/56 A GB 24172/56A GB 2417256 A GB2417256 A GB 2417256A GB 839860 A GB839860 A GB 839860A
Authority
GB
United Kingdom
Prior art keywords
oxides
aug
mixture
examples
axis
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
GB24172/56A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB839860A publication Critical patent/GB839860A/en
Expired legal-status Critical Current

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
    • C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
    • C04B35/2633—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead containing barium, strontium or calcium

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Iron (AREA)
  • Magnetic Ceramics (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

839,860. Magnetic compositions. PHILIPS ELECTRICAL INDUSTRIES Ltd. Aug. 7, 1956 [Aug. 10, 1955], No. 24172/56. Drawings to Specification. Class 38 (2). Ferromagnetic material suitable for use at frequencies of at least 50 mc/s. consists of simple and/or mixed crystals having a composition represented by the formula Ba 3 CO 2 Fe 24 O 41 of which up to one third of the Ba may be replated by Sr, Ca, and/or Pb. The crystals are hexagonal with a C-axis of about 52.3 Š and an A-axis of about 5.9 Š. The material is made by sintering in air or oxygen at a temperature not less than 1200‹ C., a mixture of oxides in suitable proportions, or of compounds such as carbonates, oxalates and acetates which convert to oxides on heating. The starting material may include preformed reaction products of two or more metal oxides, e.g. BaFe 12 O 19 having the structure of magnetoplumbite. The mixture is first ground in a ball mill with ethyl alcohol. The starting material may be presintered at 800-1100‹ C. reground, and, if desired, resintered several times. To facilitate sintering silicates or fluorides may be added, and an organic binder may be used when the material is pressed to its final shape. A number of examples of processes of manufacture exhibiting differences in detail are described, and properties of the products including values of their real permeabilities Á<SP>1</SP> are tabulated. For two examples curves are given showing variation of Á<SP>1</SP> and tan 8 = Á<SP>11</SP>/Á<SP>1</SP> with frequency (Figs. 1 and 2, not shown).
GB24172/56A 1955-08-10 1956-08-07 Improvements in or relating to ferromagnetic ferrite materials Expired GB839860A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL199609 1955-08-10

Publications (1)

Publication Number Publication Date
GB839860A true GB839860A (en) 1960-06-29

Family

ID=19750721

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24172/56A Expired GB839860A (en) 1955-08-10 1956-08-07 Improvements in or relating to ferromagnetic ferrite materials

Country Status (8)

Country Link
US (1) US2946752A (en)
BE (1) BE550224A (en)
CH (1) CH376414A (en)
DE (1) DE1148478B (en)
FR (1) FR1163019A (en)
GB (1) GB839860A (en)
LU (1) LU34573A1 (en)
NL (1) NL88282C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112851326A (en) * 2021-01-29 2021-05-28 兰州大学 Co2Z-type ferrite material and preparation method thereof

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL108776C (en) * 1957-04-18 1964-07-15
NL99528C (en) * 1957-06-22 1961-11-15
US3053618A (en) * 1960-11-23 1962-09-11 Owens Illinois Glass Co Method for making titanium, zirconium and tin tellurites
US3053619A (en) * 1960-11-30 1962-09-11 Owens Illinois Glass Co Method of producing cerium tellurite
US3177145A (en) * 1963-02-04 1965-04-06 Ibm Manganese copper ferrite composition containing titanium and germanium and method ofpreparation
FR2432754A1 (en) * 1978-08-01 1980-02-29 Thomson Csf METHOD FOR MANUFACTURING A DIELECTRIC MATERIAL WITH INSULATING BARRIERS DISTRIBUTED BY VOLUME, FOR USE AT HIGH VOLTAGE, AND ELECTRONIC DEVICE MADE WITH THIS MATERIAL
US5954992A (en) * 1996-07-26 1999-09-21 Tdk Corporation Hexagonal Z type magnetic oxide sintered material, method for making and impedance device
JPH118112A (en) * 1997-06-17 1999-01-12 Tdk Corp Balun transformer, core and core material for the same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2659698A (en) * 1949-01-03 1953-11-17 Aladdin Ind Inc Magnetic core and method for manufacturing same
LU30876A1 (en) * 1950-09-19
US2736708A (en) * 1951-06-08 1956-02-28 Henry L Crowley & Company Inc Magnetic compositions
BE516395A (en) * 1951-12-21
US2723239A (en) * 1952-09-29 1955-11-08 Rca Corp Ferrospinel compositions
US2778803A (en) * 1953-02-06 1957-01-22 Aerovox Corp Magnetically hard materials
DE927259C (en) * 1953-04-26 1955-05-02 Eisen & Stahlind Ag Oxydic ferromagnetic material
FR1100865A (en) * 1954-03-05 1955-09-26 Magnetic materials based on oxides for the production of magnetic recording tapes
FR1114010A (en) * 1954-11-09 1956-04-06 Audax Sintered mixed oxide permanent magnets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112851326A (en) * 2021-01-29 2021-05-28 兰州大学 Co2Z-type ferrite material and preparation method thereof

Also Published As

Publication number Publication date
DE1148478B (en) 1963-05-09
FR1163019A (en) 1958-09-22
NL88282C (en) 1958-05-16
BE550224A (en) 1957-02-09
US2946752A (en) 1960-07-26
CH376414A (en) 1964-03-31
LU34573A1 (en) 1956-10-09

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