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GB748070A - Improvements in or relating to methods of manufacturing ferromagnetic cores having substantially rectangular hysteresis loops - Google Patents

Improvements in or relating to methods of manufacturing ferromagnetic cores having substantially rectangular hysteresis loops

Info

Publication number
GB748070A
GB748070A GB3675754A GB3675754A GB748070A GB 748070 A GB748070 A GB 748070A GB 3675754 A GB3675754 A GB 3675754A GB 3675754 A GB3675754 A GB 3675754A GB 748070 A GB748070 A GB 748070A
Authority
GB
United Kingdom
Prior art keywords
substantially rectangular
relating
methods
rectangular hysteresis
hysteresis loops
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
GB3675754A
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 GB748070A publication Critical patent/GB748070A/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
    • C04B35/2666—Other ferrites containing nickel, copper or cobalt

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

748,070. Magnetic compositions. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Dec. 20, 1954 [Dec. 21, 1953], No. 36757/54. Drawings to Specification. Class 38 (2). A magnetic core is made of a composition having a substantially rectangular hysteresis loop, a value of coercivity not greater than 4 oersted, and a formula Cu x Ni( 1-x )Fe 2 O 4 wherein x lies between 0.01 and 0.05. Cu, Ni and Fe compounds, e.g. CuO, NiCO 3 and Fe 2 O 3 after grinding in alcohol and preheating in air at 900‹ C. are reground and heated in an atmosphere containing more than 50 per cent by volume of oxygen, at a temperature between 1375‹ C. and 1450‹ C., e.g. 1400‹ C. for 2 hours. Examples are mentioned with values of x equal to 0.01, 0.03 and 0.05.
GB3675754A 1953-12-21 1954-12-20 Improvements in or relating to methods of manufacturing ferromagnetic cores having substantially rectangular hysteresis loops Expired GB748070A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL183814 1953-12-21

Publications (1)

Publication Number Publication Date
GB748070A true GB748070A (en) 1956-04-18

Family

ID=19750638

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3675754A Expired GB748070A (en) 1953-12-21 1954-12-20 Improvements in or relating to methods of manufacturing ferromagnetic cores having substantially rectangular hysteresis loops

Country Status (8)

Country Link
BE (1) BE534277A (en)
CH (1) CH333337A (en)
DE (1) DE977425C (en)
ES (1) ES219083A1 (en)
FR (1) FR1116095A (en)
GB (1) GB748070A (en)
NL (1) NL82275C (en)
NO (1) NO88184A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2951810A (en) * 1957-02-16 1960-09-06 Kikuchi Yoshimitsu Ferrite
US2989476A (en) * 1955-10-29 1961-06-20 Steatit Magnesia Ag Ferrite with constricted magnetic hysteresis loop
US3031405A (en) * 1956-12-14 1962-04-24 Lignes Telegraph Telephon Ferromagnetic materials having a rectangular hysteresis cycle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989476A (en) * 1955-10-29 1961-06-20 Steatit Magnesia Ag Ferrite with constricted magnetic hysteresis loop
US3031405A (en) * 1956-12-14 1962-04-24 Lignes Telegraph Telephon Ferromagnetic materials having a rectangular hysteresis cycle
US2951810A (en) * 1957-02-16 1960-09-06 Kikuchi Yoshimitsu Ferrite

Also Published As

Publication number Publication date
CH333337A (en) 1958-10-15
NO88184A (en)
NL82275C (en)
FR1116095A (en) 1956-05-03
BE534277A (en)
DE977425C (en) 1966-05-26
ES219083A1 (en) 1955-12-16

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