GB1254390A - Method of producing ferrites - Google Patents

Method of producing ferrites

Info

Publication number
GB1254390A
GB1254390A GB26990/70A GB2699070A GB1254390A GB 1254390 A GB1254390 A GB 1254390A GB 26990/70 A GB26990/70 A GB 26990/70A GB 2699070 A GB2699070 A GB 2699070A GB 1254390 A GB1254390 A GB 1254390A
Authority
GB
United Kingdom
Prior art keywords
ferrite
mixture
ferrites
strontium
barium
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
GB26990/70A
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.)
Motors Liquidation Co
Original Assignee
Motors Liquidation Co
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 Motors Liquidation Co filed Critical Motors Liquidation Co
Publication of GB1254390A publication Critical patent/GB1254390A/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
    • C04B35/2683—Other ferrites containing alkaline earth metals or lead

Abstract

1,254,390. Ferrites. GENERAL MOTORS CORP. 4 June, 1970 [16 June, 1969], No. 26990/70. Heading H1H. [Also in Division C1] A finely divided ferrite is produced by coprecipitating ferric hydroxide with a barium, strontium or lead salt of an aliphatic carboxylic acid containing at least ten carbon atoms to form an intimate mixture of finely-divided particles, separating this mixture of particles from the mother liquor, heating the mixture of particles to dehydrate the ferric hydroxide and to decompose the barium, strontium or lead salt into its corresponding oxide, and then heating the resultant particulate mixture of oxides further to produce the corresponding crystalline ferrite in a finely divided form. Specified acids are lauric and stearic. The relative proportions of the starting materials may be chosen so that a hexagonal ferrite is produced. Complex ferrites may be made from mixtures of iron, barium, strontium and lead and other metals, e.g. manganese, magnesium, zinc and cobalt. The ferrites produced by this method may have an average particle size close to or smaller than the theoretical single domain size for that ferrite.
GB26990/70A 1969-06-16 1970-06-04 Method of producing ferrites Expired GB1254390A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83344769A 1969-06-16 1969-06-16

Publications (1)

Publication Number Publication Date
GB1254390A true GB1254390A (en) 1971-11-24

Family

ID=25264442

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26990/70A Expired GB1254390A (en) 1969-06-16 1970-06-04 Method of producing ferrites

Country Status (2)

Country Link
US (1) US3634254A (en)
GB (1) GB1254390A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4664831A (en) * 1981-08-19 1987-05-12 Basf Aktiengesellschaft Preparation of finely divided ferrite powders
CN115504779A (en) * 2022-11-01 2022-12-23 安徽虹泰磁电有限公司 Manganese-zinc ferrite magnetic material and preparation method thereof

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4025449A (en) * 1975-10-21 1977-05-24 The Dow Chemical Company Process to produce barium and strontium ferrite
US4058592A (en) * 1976-06-30 1977-11-15 Union Carbide Corporation Preparation of sub-micron metal oxide powders from chloride-containing compounds
US4120807A (en) * 1976-08-30 1978-10-17 Dowa Mining Co., Ltd. Process for producing hexagonal-system ferrite powder
US4120806A (en) * 1976-08-30 1978-10-17 Dowa Mining Co., Ltd. Hexagonal-system ferrite powder, composite plastic-ferrite magnet comprising same and process for production thereof
JPS6012973B2 (en) * 1980-05-08 1985-04-04 株式会社東芝 Method for producing Ba-ferrite powder
DE3042959A1 (en) * 1980-11-14 1982-07-08 Basf Ag, 6700 Ludwigshafen METHOD FOR THE PRODUCTION OF FINE-PARTICALLY HIGH-COCITIVE BARIUM-FERRITE, AND ITS USE FOR THE PRODUCTION OF MAGNETIC RECORDING CARRIERS
JPS5972104A (en) * 1982-10-19 1984-04-24 Toshiba Corp Magnetic powder
DE3537624A1 (en) * 1985-10-23 1987-04-23 Bayer Ag FINE-PART ISOMETRIC HEXAFERRITE PIGMENTS, METHOD FOR THE PRODUCTION AND USE THEREOF
US4781852A (en) * 1986-10-24 1988-11-01 Olin Corporation Process for making selected doped barium and strontium hexaferrite particles
AU1222988A (en) * 1987-01-16 1988-08-10 Clarkson University Process for preparation of monodispersed barium containing ferrites
FR2660650B1 (en) * 1990-04-09 1993-01-08 Centre Nat Rech Scient PROCESS FOR THE PREPARATION OF HEXAFERRITE PARTICLES.
US5306592A (en) * 1992-10-29 1994-04-26 Eastman Kodak Company Method of preparing electrographic magnetic carrier particles
US5268249A (en) * 1992-10-29 1993-12-07 Eastman Kodak Company Magnetic carrier particles
JP2009084125A (en) * 2007-10-02 2009-04-23 Tdk Corp Method for manufacturing ferrite powder, ferrite powder, and magnetic recording medium

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4664831A (en) * 1981-08-19 1987-05-12 Basf Aktiengesellschaft Preparation of finely divided ferrite powders
CN115504779A (en) * 2022-11-01 2022-12-23 安徽虹泰磁电有限公司 Manganese-zinc ferrite magnetic material and preparation method thereof
CN115504779B (en) * 2022-11-01 2023-04-14 安徽虹泰磁电有限公司 Manganese-zinc ferrite magnetic material and preparation method thereof

Also Published As

Publication number Publication date
US3634254A (en) 1972-01-11

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