GB846274A - Improvements in or relating to ferromagnetic ferrite bodies - Google Patents

Improvements in or relating to ferromagnetic ferrite bodies

Info

Publication number
GB846274A
GB846274A GB32511/56A GB3251156A GB846274A GB 846274 A GB846274 A GB 846274A GB 32511/56 A GB32511/56 A GB 32511/56A GB 3251156 A GB3251156 A GB 3251156A GB 846274 A GB846274 A GB 846274A
Authority
GB
United Kingdom
Prior art keywords
cooling
core
oct
magnetic
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
GB32511/56A
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.)
Steatit Magnesia AG
Steatite Research Corp
Original Assignee
Steatit Magnesia AG
Steatite Research Corp
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 Steatit Magnesia AG, Steatite Research Corp filed Critical Steatit Magnesia AG
Publication of GB846274A publication Critical patent/GB846274A/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
    • 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
    • C04B35/2625—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 magnesium

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)
  • Magnetic Ceramics (AREA)

Abstract

846,274. Magnetic compositions. STEATITMAGNESIA A.G., and STEATITE RESEARCH CORPORATION. Oct. 25, 1956 [Oct. 25, 1955], No. 32511/56. Class 38 (2). A ring of magnetic ferrite exhibiting a rectangular hysteresis loop is made by adding 0.1- 5% by weight of cobalt oxide to mixtures of oxides which form on sintering, nickel-zinc or magnesium-zinc ferrites having the constitutions shown in Figs. 5 and 6, grinding, screening, compressing sintering at above 1000‹ C. and slowly cooling to room temperature in at least 12 hours, or rapidly cooling and reheating to 600‹ C. and slowly cooling, the cooling being carried out while a magnetic field is produced circumferentially in the core. The magnetic field, which may be applied during heating as well as cooling may be produced by passing through a toroidal winding on the core or a single conduit passing through the ring direct current, or a discontinuous current from intermittent condenser discharges. The intermediate stage of the core having a constructed hysteresis loop is referred to.
GB32511/56A 1955-10-25 1956-10-25 Improvements in or relating to ferromagnetic ferrite bodies Expired GB846274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE846274X 1955-10-25

Publications (1)

Publication Number Publication Date
GB846274A true GB846274A (en) 1960-08-31

Family

ID=6775028

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32511/56A Expired GB846274A (en) 1955-10-25 1956-10-25 Improvements in or relating to ferromagnetic ferrite bodies

Country Status (2)

Country Link
FR (1) FR1159399A (en)
GB (1) GB846274A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1696456B1 (en) * 1965-03-24 1970-11-12 Telefunken Patent Process for the production of a substoechiometric ferrite with an almost rectangular, temperature-stable hysteresis loop for switching ring cores
DE1646997B1 (en) * 1965-08-10 1972-06-29 Siemens Ag PROCESS FOR MANUFACTURING A FERROMAGNETIC SWITCH CORE FROM FERRITE WITH A RECTANGULAR HYSTERESIS LOOP

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1696456B1 (en) * 1965-03-24 1970-11-12 Telefunken Patent Process for the production of a substoechiometric ferrite with an almost rectangular, temperature-stable hysteresis loop for switching ring cores
DE1646997B1 (en) * 1965-08-10 1972-06-29 Siemens Ag PROCESS FOR MANUFACTURING A FERROMAGNETIC SWITCH CORE FROM FERRITE WITH A RECTANGULAR HYSTERESIS LOOP

Also Published As

Publication number Publication date
FR1159399A (en) 1958-06-26

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