GB861594A - Methods of preparing ferrite cores - Google Patents

Methods of preparing ferrite cores

Info

Publication number
GB861594A
GB861594A GB32579/58A GB3257958A GB861594A GB 861594 A GB861594 A GB 861594A GB 32579/58 A GB32579/58 A GB 32579/58A GB 3257958 A GB3257958 A GB 3257958A GB 861594 A GB861594 A GB 861594A
Authority
GB
United Kingdom
Prior art keywords
mno
cooling
cdo
zno
oct
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
GB32579/58A
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 GB861594A publication Critical patent/GB861594A/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

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

861,594. Magnetic compositions. INTERNATIONAL BUSINESS MACHINES CORPORATION. Oct. 13, 1958 [Oct. 15, 1957], No. 32579/58. Class 38 (2). Ferrite cores 4 formed by compacting powdered metal oxides are sintered in a platinum vessel 3 covered with a platinum lid 2 to prevent volatilization of metals from the green core. A quantity of the ferrite powder 5 may be included in the vessel. The sintering period may be from ¢ to 3 hours at temperatures between 1000 and 1500‹ C. in air. Cooling may take place in two stages, furnace cooling for a period of 10-45 minutes followed by quenching to room temperature. The precise times and temperatures for sintering and cooling are given for the various examples disclosed which include ferrites of the following mol. percentage compositions : 15ZnO, 35 MnO, 50 Fe 2 O 3 ; 15-20 CdO, 35-50 MnO, 35-45 Fe 2 O 3 ; 10 ZnO, 50 MnO, 40 Fe 2 O 3 ; 12 CdO, 33 NiO, 55 Fe 2 O 3 ; 13.8 ZnO, 20.7 MnO, 27.6 MgO, 37.9 Fe 2 O 3 . In each case a comparative sample made in an open boat was made and the physical properties, e.g. switching times, were compared. Tables indicating the volatilization losses in a sample having the composition Fe 1.5 Mn 0.6 Zn 0.6 Mg 0.3 O 4 are given.
GB32579/58A 1957-10-15 1958-10-13 Methods of preparing ferrite cores Expired GB861594A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US861594XA 1957-10-15 1957-10-15

Publications (1)

Publication Number Publication Date
GB861594A true GB861594A (en) 1961-02-22

Family

ID=22196674

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32579/58A Expired GB861594A (en) 1957-10-15 1958-10-13 Methods of preparing ferrite cores

Country Status (1)

Country Link
GB (1) GB861594A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1671002B1 (en) * 1965-09-28 1970-11-05 Siemens Ag Ceramic container for sintering highly permeable ferrite cores
DE1646809B1 (en) * 1966-08-26 1971-12-30 Nippon Columbia METHOD OF MANUFACTURING A SINGLE CRYSTALLINE OXIDE MAGNET

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1671002B1 (en) * 1965-09-28 1970-11-05 Siemens Ag Ceramic container for sintering highly permeable ferrite cores
DE1646809B1 (en) * 1966-08-26 1971-12-30 Nippon Columbia METHOD OF MANUFACTURING A SINGLE CRYSTALLINE OXIDE MAGNET

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