GB739069A - Improvements in or relating to methods of manufacturing magnetic ferrites - Google Patents

Improvements in or relating to methods of manufacturing magnetic ferrites

Info

Publication number
GB739069A
GB739069A GB2209452A GB2209452A GB739069A GB 739069 A GB739069 A GB 739069A GB 2209452 A GB2209452 A GB 2209452A GB 2209452 A GB2209452 A GB 2209452A GB 739069 A GB739069 A GB 739069A
Authority
GB
United Kingdom
Prior art keywords
ferrite
dissolved
heating
powder
sintering
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
GB2209452A
Inventor
Chow Quantie
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB2209452A priority Critical patent/GB739069A/en
Publication of GB739069A publication Critical patent/GB739069A/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

Landscapes

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

Abstract

A magnetic ferrite powder, which may be magnetically soft or hard, is made by forming a solution of suitable compounds, evaporating the solvent, at a temperature near its boiling point and heating the powdered residue at a high temperature. Suitable compounds may be dissolved in water or acid, or the solution may be formed by melting crystals. In one example, MgCl2, 6H2O and Fe(NO3)39H2 are heated together in a glass vessel at 150 DEG C., dried between 150 DEG C. and 200 DEG C. and heated at 700 DEG C. under oxygen whereby after 2 hours magnesium ferrite of 8 microns maximum particle size is formed. Another hour of heating at 1200 DEG C. gives a powder with half its particles greater than 8 microns. In other examples, cobalt ferrite is obtained by sintering at 900 DEG C. in nitrogen the residue obtained from heating below 200 DEG C. nitric acid in which cobalt and iron have been dissolved; nickel zinc ferrite is obtained either by firing at 1000 DEG C. and then sintering at 1200-1400 DEG C. under oxygen the residue obtained from melting and drying a mixture of FeSO4, 7H2O, ZnSO4, 7H2O and NiSO4 7H2O, or by heating at 650 DEG C. and sintering at 1200 DEG C. in air the residue obtained from drying water in which nickel citrate, zinc citrate and ferric citrate have been dissolved. The ferrite powder may be used as paint, compressed and sintered to a high permeability core, or with the use of a magnetic field to a permanent magnet. In one example the powder is first coated with stearic acid dissolved in ether.
GB2209452A 1952-09-02 1952-09-02 Improvements in or relating to methods of manufacturing magnetic ferrites Expired GB739069A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2209452A GB739069A (en) 1952-09-02 1952-09-02 Improvements in or relating to methods of manufacturing magnetic ferrites

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2209452A GB739069A (en) 1952-09-02 1952-09-02 Improvements in or relating to methods of manufacturing magnetic ferrites

Publications (1)

Publication Number Publication Date
GB739069A true GB739069A (en) 1955-10-26

Family

ID=10173812

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2209452A Expired GB739069A (en) 1952-09-02 1952-09-02 Improvements in or relating to methods of manufacturing magnetic ferrites

Country Status (1)

Country Link
GB (1) GB739069A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3019189A (en) * 1958-04-07 1962-01-30 Steatite Res Corp Mixed ferrites by a coprecipitation process
US3039964A (en) * 1957-05-06 1962-06-19 Du Pont Preparation of ilmenite-type compounds
US3039965A (en) * 1957-05-06 1962-06-19 Du Pont Ilmenite-type complex manganese oxides and preparation thereof
US3075920A (en) * 1961-05-26 1963-01-29 Ampex Method of producing a ferrite body and product obtained thereby
US3081264A (en) * 1958-04-09 1963-03-12 Matake Kurokawa Method of preparing a magnetic recorder powder
US3428416A (en) * 1963-08-09 1969-02-18 Philips Corp Method of manufacturing ferrites
CN103073063A (en) * 2012-12-17 2013-05-01 沈阳化工大学 Method for preparing nanometer magnesium ferrite through utilizing active magnesium oxide as raw material
US10456775B2 (en) * 2016-03-28 2019-10-29 Lg Chem, Ltd. Method of preparing zinc ferrite catalyst
CN116692951A (en) * 2023-08-07 2023-09-05 星恒电源股份有限公司 Preparation method of spinel metal oxide magnetic material

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3039964A (en) * 1957-05-06 1962-06-19 Du Pont Preparation of ilmenite-type compounds
US3039965A (en) * 1957-05-06 1962-06-19 Du Pont Ilmenite-type complex manganese oxides and preparation thereof
US3019189A (en) * 1958-04-07 1962-01-30 Steatite Res Corp Mixed ferrites by a coprecipitation process
US3081264A (en) * 1958-04-09 1963-03-12 Matake Kurokawa Method of preparing a magnetic recorder powder
US3075920A (en) * 1961-05-26 1963-01-29 Ampex Method of producing a ferrite body and product obtained thereby
US3428416A (en) * 1963-08-09 1969-02-18 Philips Corp Method of manufacturing ferrites
CN103073063A (en) * 2012-12-17 2013-05-01 沈阳化工大学 Method for preparing nanometer magnesium ferrite through utilizing active magnesium oxide as raw material
CN103073063B (en) * 2012-12-17 2014-11-12 沈阳化工大学 Method for preparing nanometer magnesium ferrite through utilizing active magnesium oxide as raw material
US10456775B2 (en) * 2016-03-28 2019-10-29 Lg Chem, Ltd. Method of preparing zinc ferrite catalyst
CN116692951A (en) * 2023-08-07 2023-09-05 星恒电源股份有限公司 Preparation method of spinel metal oxide magnetic material
CN116692951B (en) * 2023-08-07 2023-11-03 星恒电源股份有限公司 Preparation method of spinel metal oxide magnetic material

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