GB1292735A - Method of manufacturing a sintered ferromagnetic ferrite body - Google Patents

Method of manufacturing a sintered ferromagnetic ferrite body

Info

Publication number
GB1292735A
GB1292735A GB02763/70A GB1276370A GB1292735A GB 1292735 A GB1292735 A GB 1292735A GB 02763/70 A GB02763/70 A GB 02763/70A GB 1276370 A GB1276370 A GB 1276370A GB 1292735 A GB1292735 A GB 1292735A
Authority
GB
United Kingdom
Prior art keywords
mol
mixture
zno
fired
march
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
GB02763/70A
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 GB1292735A publication Critical patent/GB1292735A/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
    • C04B35/265—Compositions containing one or more ferrites of the group comprising manganese or zinc and one or more ferrites of the group comprising nickel, copper or cobalt
    • 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
    • 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
    • H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
    • H01F1/0311—Compounds
    • H01F1/0313—Oxidic compounds

Landscapes

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

Abstract

1292735 Magnetic compositions PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 17 March 1970 [20 March 1969] 12763/70 Heading H1H A sintered ferromagnetic ferrite body consisting of interlocking crystals having an average grain size of more than 50 microns, is made by adding 0À01-0À1% by wt. of an alkaline earth metal metaborate to the starting mixture of metal oxides and/or compounds decomposable thereto at the: sintering temperature. The average grain size is defined as the quotient of the length in microns of any straight line drawn on a section of the body and the number of crystals intersected by that line. The body may have a composition corresponding to 5-35 mol.% NiO; 15-45 mol. % ZnO; 48-50 mol. % Fe 2 O 3 . In an example, calcium metaborate is added to a mixture of N 1 O, ZnO and Fe 2 O 3 . The mixture is fired at 850‹ C. for 1 hour, ground, compressed and then fired for 20 hours at 1200‹ C. in pure O 2 .
GB02763/70A 1969-03-20 1970-03-17 Method of manufacturing a sintered ferromagnetic ferrite body Expired GB1292735A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6904352A NL6904352A (en) 1969-03-20 1969-03-20

Publications (1)

Publication Number Publication Date
GB1292735A true GB1292735A (en) 1972-10-11

Family

ID=19806482

Family Applications (1)

Application Number Title Priority Date Filing Date
GB02763/70A Expired GB1292735A (en) 1969-03-20 1970-03-17 Method of manufacturing a sintered ferromagnetic ferrite body

Country Status (6)

Country Link
US (1) US3671436A (en)
BE (1) BE747579A (en)
CA (1) CA928059A (en)
FR (1) FR2039710A5 (en)
GB (1) GB1292735A (en)
NL (1) NL6904352A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114180951A (en) * 2021-12-24 2022-03-15 安徽龙磁科技股份有限公司 Ferrite slurry containing colemanite and preparation method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2148554A1 (en) * 1970-10-07 1972-04-13 Philips Nv Process for the production of a polycrystalline ferrite body
US6533956B2 (en) * 1999-12-16 2003-03-18 Tdk Corporation Powder for magnetic ferrite, magnetic ferrite, multilayer ferrite components and production method thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1142675A (en) * 1956-02-14 1957-09-20 Lignes Telegraph Telephon Ferromagnetic materials with rectangular hysteresis cycle
DE1094995B (en) * 1960-01-26 1960-12-15 Grundig Max Magnetic head
US3117934A (en) * 1961-04-17 1964-01-14 Bell Telephone Labor Inc Garnet growth from barium oxide-boron oxide flux
NL281410A (en) * 1962-07-25 1964-12-10

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114180951A (en) * 2021-12-24 2022-03-15 安徽龙磁科技股份有限公司 Ferrite slurry containing colemanite and preparation method thereof
CN114180951B (en) * 2021-12-24 2023-02-28 安徽龙磁科技股份有限公司 Ferrite slurry containing colemanite and preparation method thereof

Also Published As

Publication number Publication date
US3671436A (en) 1972-06-20
BE747579A (en) 1970-09-18
NL6904352A (en) 1970-09-22
DE2010761B2 (en) 1977-04-21
CA928059A (en) 1973-06-12
DE2010761A1 (en) 1970-10-01
FR2039710A5 (en) 1971-01-15

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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