GB1209439A - Soft magnetic ferrite materials - Google Patents

Soft magnetic ferrite materials

Info

Publication number
GB1209439A
GB1209439A GB28564/69A GB2856469A GB1209439A GB 1209439 A GB1209439 A GB 1209439A GB 28564/69 A GB28564/69 A GB 28564/69A GB 2856469 A GB2856469 A GB 2856469A GB 1209439 A GB1209439 A GB 1209439A
Authority
GB
United Kingdom
Prior art keywords
firing
june
binder
soft magnetic
minutes
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
GB28564/69A
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 Electronics UK Ltd
Original Assignee
Philips Electronic and Associated 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 Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1209439A publication Critical patent/GB1209439A/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
    • C04B35/2616—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 lithium
    • 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
    • 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
    • H01F1/12—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 soft-magnetic materials
    • H01F1/34—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 soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/342—Oxides
    • H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/58—Processes of forming magnets

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Soft Magnetic Materials (AREA)
  • Magnetic Ceramics (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

1,209,439. Ferrites; magnetic cores. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 5 June, 1969 [8 June, 1968], No. 28564/69. Heading H1H. A soft magnetic lithium-zinc-nickel ferrite material has the composition in mole per cent: Fe 2 O 3 74À5-80; Li 2 O 12À5-14À6; ZnO 3À0- 8À0; NiO up to 6À1. A sintered ferrite body, e.g. an annular core, is made by pre-firing a mixture of oxides and/or oxide-forming compounds of the above metals in the above proportions, forming a body of the pulverized pre-fired product, and sintering the body at 1100- 1200‹ C., the body being heated to the sintering temperature within 1 minute, maintained at this temperature for 1¢-8 minutes, and cooled to room temperature at substantially constant speed over 5-30 minutes. Pre-firing may be carried out at e.g. 600‹ C. in a fluidized bed. The body may be formed by compressing granules obtained by spray-drying an acetone suspension of pre-fired powder, or by punching a dried sheet made by casting on to a substrate a mixture of preferred powder with a binder. Acetone or binder may be removed by heating to 300‹ C.
GB28564/69A 1968-06-08 1969-06-05 Soft magnetic ferrite materials Expired GB1209439A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6808112A NL6808112A (en) 1968-06-08 1968-06-08

Publications (1)

Publication Number Publication Date
GB1209439A true GB1209439A (en) 1970-10-21

Family

ID=19803856

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28564/69A Expired GB1209439A (en) 1968-06-08 1969-06-05 Soft magnetic ferrite materials

Country Status (8)

Country Link
US (1) US3717578A (en)
JP (1) JPS4915319B1 (en)
BE (1) BE734189A (en)
BR (1) BR6909576D0 (en)
DE (1) DE1925822A1 (en)
FR (1) FR2010437A1 (en)
GB (1) GB1209439A (en)
NL (1) NL6808112A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1208358B (en) * 1987-03-31 1989-06-12 Brussino Massimo PROCEDURE FOR THE PRODUCTION OF MAGNETIC PLASTIC LAMINATE AND MAGNETIC LAMINATE OBTAINED WITH THIS PROCEDURE

Also Published As

Publication number Publication date
BE734189A (en) 1969-12-08
JPS4915319B1 (en) 1974-04-13
US3717578A (en) 1973-02-20
DE1925822A1 (en) 1969-12-11
BR6909576D0 (en) 1973-01-02
NL6808112A (en) 1969-12-10
FR2010437A1 (en) 1970-02-13

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee