GB674828A - Improvements in or relating to the manufacture of magnetic materials - Google Patents

Improvements in or relating to the manufacture of magnetic materials

Info

Publication number
GB674828A
GB674828A GB7578/47A GB757847A GB674828A GB 674828 A GB674828 A GB 674828A GB 7578/47 A GB7578/47 A GB 7578/47A GB 757847 A GB757847 A GB 757847A GB 674828 A GB674828 A GB 674828A
Authority
GB
United Kingdom
Prior art keywords
atmosphere
manganese
oxygen
ferrite
effected
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
GB7578/47A
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 GB674828A publication Critical patent/GB674828A/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)
  • Magnetic Ceramics (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

In the production of fine grained porous ferro-magnetic ferrites containing manganese by sintering a mixture containing the oxides of manganese and iron, the cooling of the sintered product is effected in an atmosphere, the oxygen partial pressure of which decreases with decreasing temperature. This may be effected by employing a nitrogen-oxygen atmosphere, the oxygen being obtained by electrolysis and the current being decreased with decreasing temperature of the ferrite, or by cooling in an atmosphere of superheated steam and inert gas when the dissociation of the water vapour will be proportioned to the temperature of the ferrite. According to an example, manganese oxide, zinc oxide and ferric oxide are ground, moulded and sintered in an atmosphere of superheated steam at 1250 DEG C for 2 hours and cooled in the same atmosphere. Specification 655,666 is referred to.
GB7578/47A 1946-03-22 1947-03-19 Improvements in or relating to the manufacture of magnetic materials Expired GB674828A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL674828X 1946-03-22
NL264738X 1946-03-22

Publications (1)

Publication Number Publication Date
GB674828A true GB674828A (en) 1952-07-02

Family

ID=26643575

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7578/47A Expired GB674828A (en) 1946-03-22 1947-03-19 Improvements in or relating to the manufacture of magnetic materials

Country Status (2)

Country Link
CH (1) CH264738A (en)
GB (1) GB674828A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2958664A (en) * 1955-01-28 1960-11-01 Steatite Res Corp Making manganese-zinc ferrites
EP2246305A1 (en) * 2009-04-29 2010-11-03 IFP Energies nouvelles Mixed iron-manganese oxides for high temperature oxygen production

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2958664A (en) * 1955-01-28 1960-11-01 Steatite Res Corp Making manganese-zinc ferrites
EP2246305A1 (en) * 2009-04-29 2010-11-03 IFP Energies nouvelles Mixed iron-manganese oxides for high temperature oxygen production
FR2945036A1 (en) * 2009-04-29 2010-11-05 Inst Francais Du Petrole FER-MANGANESE MIXED OXIDES FOR THE PRODUCTION OF HIGH TEMPERATURE OXYGEN
US8211212B2 (en) 2009-04-29 2012-07-03 Ifp Mixed iron-manganese oxides for high-temperature oxygen production

Also Published As

Publication number Publication date
CH264738A (en) 1949-10-31

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