GB959643A - - Google Patents

Info

Publication number
GB959643A
GB959643A GB26063A GB26063A GB959643A GB 959643 A GB959643 A GB 959643A GB 26063 A GB26063 A GB 26063A GB 26063 A GB26063 A GB 26063A GB 959643 A GB959643 A GB 959643A
Authority
GB
United Kingdom
Prior art keywords
temperature
mol
cooled
sintering
quenched
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
GB26063A
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 filed Critical
Publication of GB959643A publication Critical patent/GB959643A/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
    • C04B35/2608—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
    • C04B35/2616—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 lithium

Abstract

959,643. Magnetic compositions. PHILIPS ELECTRICAL INDUSTRIES Ltd. Jan. 2, 1963 [Jan. 5, 1962], No. 260/63. Heading H1H. A method of manufacturing a magnetic core having a substantially rectangular hysteresis loop and comprising a ferromagnetic mixed ferrite, comprises mixing powdered metal oxides (or oxide-yielding compounds) according to the proportions 2-20 % mol. Li 2 O, 0.5- 45 % mol. NiO, 50-85 % mol. Fe 2 O 3 , 0-3 % mol. ZnO, and 0-8 % mol. CuO, compressing into shape, and sintering in air or air plus oxygen at a temperature between 1200 ‹ and 1400 ‹ C. A presintering step may be included. After sintering the mixture may be cooled by one of two schedules : (a) it may be cooled at a rate less than 30‹ C. per minute to a temperature which is 100‹ to 600‹ C. lower than the sintering temperature and then quenched; or (b) it may be cooled at a rate greater than 30‹ C. per minute to such a temperature, held at this temperature for at least 5 minutes, and then quenched. A magnetic memory element formed using the core has properties which are more stable with temperature variation.
GB26063A 1962-01-05 1963-01-02 Expired GB959643A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL273242 1962-01-05

Publications (1)

Publication Number Publication Date
GB959643A true GB959643A (en) 1964-06-03

Family

ID=19753515

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26063A Expired GB959643A (en) 1962-01-05 1963-01-02

Country Status (11)

Country Link
US (1) US3226328A (en)
AT (1) AT238957B (en)
BE (1) BE626825A (en)
CH (1) CH437558A (en)
DE (1) DE1265024B (en)
DK (1) DK116073B (en)
ES (1) ES283884A1 (en)
FR (1) FR1344662A (en)
GB (1) GB959643A (en)
NL (1) NL273242A (en)
OA (1) OA00771A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL278942A (en) * 1962-05-25
NL286715A (en) * 1962-12-13 1965-02-10
NL290005A (en) * 1963-03-08
BE649467A (en) * 1963-06-20

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL77389C (en) * 1949-04-28 1955-02-15
US2565111A (en) * 1949-05-26 1951-08-21 Steatite Res Corp Ceramic magnetic material with a small temperature coefficient
GB713370A (en) * 1952-04-18 1954-08-11 Nat Res Dev Improvements in or relating to ferrite magnetic materials
NL82272C (en) * 1953-12-21 1956-08-15
NL82273C (en) * 1953-12-21 1956-08-15
US3038860A (en) * 1956-12-20 1962-06-12 Francis E Vinal Lithium nickel ferrites
US3033792A (en) * 1957-05-28 1962-05-08 Kikuchi Yoshimitsu Method of manufacturing ferrite magnetostriction vibrators

Also Published As

Publication number Publication date
ES283884A1 (en) 1963-06-16
AT238957B (en) 1965-03-10
NL273242A (en)
CH437558A (en) 1967-06-15
DE1265024B (en) 1968-03-28
US3226328A (en) 1965-12-28
DK116073B (en) 1969-12-08
FR1344662A (en) 1963-11-29
OA00771A (en) 1967-11-15
BE626825A (en) 1963-07-04

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