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GB887632A - Improvements in and relating to the manufacture of square hysteresis loop ferrite cores - Google Patents

Improvements in and relating to the manufacture of square hysteresis loop ferrite cores

Info

Publication number
GB887632A
GB887632A GB35097/60A GB3509760A GB887632A GB 887632 A GB887632 A GB 887632A GB 35097/60 A GB35097/60 A GB 35097/60A GB 3509760 A GB3509760 A GB 3509760A GB 887632 A GB887632 A GB 887632A
Authority
GB
United Kingdom
Prior art keywords
cores
temperature
mol
per cent
manufacture
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
GB35097/60A
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 GB887632A publication Critical patent/GB887632A/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
    • 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
    • C04B35/2658—Other ferrites containing manganese or zinc, e.g. Mn-Zn 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)
  • Soft Magnetic Materials (AREA)
  • Magnetic Ceramics (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

887,632. Magnetic compositions. INTERNATIONAL BUSINESS MACHINES CORPORATION. Oct. 13, 1960 [Nov. 10, 1959], No. 35097/60. Drawings to Specification. Class 38 (2). In a process for the manufacture of magnetic cores having a square hysteresis loop and a coercivity between 1.1 oe. and 3.7 oe., which comprises the steps of mixing metal oxides including MnO and Fe 2 O 3 , calcining, pressing to form cores, and sintering, the values of Fe 2 O 3 particle size, calcining temperature, pressed density and sintering temperature are chosen to produce cores having a sintered density between 4.48 and 4.55 gm./c.c. The material may have a composition 38-44.4 mol. per cent Fe 2 O 3 , 55.1-60 mol. per cent MnO and 0-5 mol. per cent of (a) CuO or (b) CrO+NiO. The Fe 2 O 3 particles may have an average size of 0.6, 0.8 or 2.0 Á. A slurry, formed by wet ballmilling the oxides, is dried and ground and calcined in air for 30-180 minutes at a temperature between 750‹ C. and 950‹ C. The material is remilled, mixed with a binder and lubricant, moulded under pressure to form unsintered cores having a density 2.85-3.35 gm./c.c. and sintered at a temperature between 1100‹ C. and 1430‹ C.
GB35097/60A 1959-11-10 1960-10-13 Improvements in and relating to the manufacture of square hysteresis loop ferrite cores Expired GB887632A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US851997A US3054752A (en) 1959-11-10 1959-11-10 Square loop magnetic manganeseferrite material and manufacture thereof

Publications (1)

Publication Number Publication Date
GB887632A true GB887632A (en) 1962-01-24

Family

ID=25312242

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35097/60A Expired GB887632A (en) 1959-11-10 1960-10-13 Improvements in and relating to the manufacture of square hysteresis loop ferrite cores

Country Status (5)

Country Link
US (1) US3054752A (en)
DE (1) DE1178763B (en)
FR (1) FR1279330A (en)
GB (1) GB887632A (en)
NL (1) NL257266A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1272799B (en) * 1963-02-04 1968-07-11 Ibm Ferrite bodies for storage and switching elements and processes for their production

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL278942A (en) * 1962-05-25
US4247500A (en) * 1979-12-07 1981-01-27 Bell Telephone Laboratories, Incorporated Fabrication of ferrite material
WO2012131660A1 (en) 2011-04-01 2012-10-04 Ecole Polytechnique Federale De Lausanne (Epfl) Robotic system for spinal and other surgeries
US10624710B2 (en) 2012-06-21 2020-04-21 Globus Medical, Inc. System and method for measuring depth of instrumentation
US11510684B2 (en) 2019-10-14 2022-11-29 Globus Medical, Inc. Rotary motion passive end effector for surgical robots in orthopedic surgeries

Family Cites Families (7)

* 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1272799B (en) * 1963-02-04 1968-07-11 Ibm Ferrite bodies for storage and switching elements and processes for their production

Also Published As

Publication number Publication date
FR1279330A (en) 1961-12-22
US3054752A (en) 1962-09-18
DE1178763B (en) 1964-09-24
NL257266A (en)

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