GB971208A - Improvements in and relating to methods of producing ferrite bodies - Google Patents

Improvements in and relating to methods of producing ferrite bodies

Info

Publication number
GB971208A
GB971208A GB37934/60A GB3793460A GB971208A GB 971208 A GB971208 A GB 971208A GB 37934/60 A GB37934/60 A GB 37934/60A GB 3793460 A GB3793460 A GB 3793460A GB 971208 A GB971208 A GB 971208A
Authority
GB
United Kingdom
Prior art keywords
temperature
sintering
mol
minutes
per cent
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
GB37934/60A
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB971208A publication Critical patent/GB971208A/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
    • 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

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

971,208. Magnetic compositions. INTERNATIONAL BUSINESS MACHINES CORPORATION. Nov. 4, 1960 [Nov. 10, 1959], No. 37934/60. Heading H1H. In preparing a magnetic ferrite body with a square hysteresis loop by sintering a mixture of metal oxides comprising 38-44.4 mol. per cent Fe 2 O 3 , 51.1-60 mol. per cent MnO, and 0-5 mol. per cent CuO or CrO + NiO, the sintering at a temperature between 1000‹ and 1500‹ C. is interrupted by cooling the body to a temperature below. 250‹ C., after which sintering at the original temperature is completed. The metal oxides are ball-milled forming a slurry which is dried, ground and calcined at 600‹ to 1000‹ C. for 30-180 minutes. The material is reground, a binder (polyvinyl alcohol) and a lubricant (dibutyl phthalate) are added, and the mixture is moulded to form a " green " body. This is heated to 600‹ C. when the binder and lubricant are driven off. The body is then sintered between 1100‹ and 1500‹ C. for a total time of 15 to 30 minutes, this being interrupted by the removal of the body from the furnace when it is cooled to below 250‹ C. This quench temperature may be maintained for a non- critical time, i.e. minutes or days. The squareness of the magnetic loop is improved by the method.
GB37934/60A 1959-11-10 1960-11-04 Improvements in and relating to methods of producing ferrite bodies Expired GB971208A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US852097A US3083164A (en) 1959-11-10 1959-11-10 Method of producing ferrite bodies

Publications (1)

Publication Number Publication Date
GB971208A true GB971208A (en) 1964-09-30

Family

ID=25312484

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37934/60A Expired GB971208A (en) 1959-11-10 1960-11-04 Improvements in and relating to methods of producing ferrite bodies

Country Status (4)

Country Link
US (1) US3083164A (en)
FR (1) FR1273158A (en)
GB (1) GB971208A (en)
NL (1) NL256989A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1278921B (en) * 1963-09-06 1968-09-26 Siemens Ag Process to improve the temporal permeability constancy of manganese-zinc-ferrite cores

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1062611B (en) * 1953-10-07 1959-07-30 Philips Nv Process for the production of a ferrite material for magnetic cores with an almost rectangular hysteresis loop
NL82276C (en) * 1953-12-22
US2818387A (en) * 1954-10-28 1957-12-31 Philips Corp Square loop ferromagnetic material
FR1121088A (en) * 1955-02-03 1956-07-20 Lignes Telegraph Telephon Ferromagnetic materials with rectangular hysteresis cycle
FR1125577A (en) * 1955-05-03 1956-11-02 Lignes Telegraph Telephon Ferromagnetic materials with rectangular hysteresis cycle
BE548662A (en) * 1955-06-16
AT204795B (en) * 1955-06-30 1959-08-10 Siemens Ag Process for the production of magnetizable cores
BE560877A (en) * 1956-09-17

Also Published As

Publication number Publication date
US3083164A (en) 1963-03-26
NL256989A (en)
FR1273158A (en) 1961-10-06

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