GB760035A - Improvements in the manufacture of ferromagnetic spinels with square hysteresis loop - Google Patents

Improvements in the manufacture of ferromagnetic spinels with square hysteresis loop

Info

Publication number
GB760035A
GB760035A GB27954A GB27954A GB760035A GB 760035 A GB760035 A GB 760035A GB 27954 A GB27954 A GB 27954A GB 27954 A GB27954 A GB 27954A GB 760035 A GB760035 A GB 760035A
Authority
GB
United Kingdom
Prior art keywords
oxides
jan
hysteresis loop
per cent
metal oxide
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
GB27954A
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.)
Steatite Research Corp
Original Assignee
Steatite Research 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 Steatite Research Corp filed Critical Steatite Research Corp
Publication of GB760035A publication Critical patent/GB760035A/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
    • C04B35/2625—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 magnesium

Abstract

760,035. Magnetic compositions. STEATITE RESEARCH CORPORATION. Jan. 5, 1954 [Jan. 21, 1953], No. 279/54. Addition to 677,692. Drawings to Specification. Class 38 (2). A ferrite core suitable for computers having a substantially rectangular hysteresis loop with a high Br/B8 ratio, sharp corners and a fast switching time is made by the method which forms the invention of the parent Specification, from a mixture of ferric oxide, magnanese dioxide, magnesium oxide up to 5 per cent by weight of a second bivalent heavy metal oxide such as zinc, copper or nickel oxides and up to 4 per cent by weight of a non-metallic or light metal oxide such as silica or aluminium, titanium or calcium oxides. Suitable proportions of starting materials are those used in the invention of Specification 697,219. To make a core of magnesium manganese ferrite, powdered oxides mixed with water and an organic binder, e.g. flour or gum are compressed and fixed in air at 2350‹ to 2400‹ F. The cores are then heated at 2100‹ F. in a muffle furnace or a tunnel kiln in an atmosphere of water vapour or neutral gas such as helium, argon or carbon dioxide. The reheating may be repeated several times. Properties of the cores whose manufacture is described are tabulated.
GB27954A 1953-01-21 1954-01-05 Improvements in the manufacture of ferromagnetic spinels with square hysteresis loop Expired GB760035A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US760035X 1953-01-21

Publications (1)

Publication Number Publication Date
GB760035A true GB760035A (en) 1956-10-31

Family

ID=22129302

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27954A Expired GB760035A (en) 1953-01-21 1954-01-05 Improvements in the manufacture of ferromagnetic spinels with square hysteresis loop

Country Status (2)

Country Link
FR (1) FR1091402A (en)
GB (1) GB760035A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3028336A (en) * 1957-09-25 1962-04-03 Ibm Cadmium manganese ferrospinel composition
US3042619A (en) * 1959-12-31 1962-07-03 Ibm Ferrite composition for bistable magnetic circuits
US3059194A (en) * 1958-12-29 1962-10-16 Bell Telephone Labor Inc Microwave ferrite devices
US3097979A (en) * 1960-12-05 1963-07-16 Union Carbide Corp Magnetic flux-gas shielded metal arc welding
US3150095A (en) * 1961-11-24 1964-09-22 Ibm Ferrite ceramic compositions and method of preparation
DE1278921B (en) * 1963-09-06 1968-09-26 Siemens Ag Process to improve the temporal permeability constancy of manganese-zinc-ferrite cores
DE1696412B1 (en) * 1962-12-21 1970-06-11 Ibm Process for the production of ferrite cores with a rectangular hysteresis loop and spinel structure

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3028336A (en) * 1957-09-25 1962-04-03 Ibm Cadmium manganese ferrospinel composition
US3059194A (en) * 1958-12-29 1962-10-16 Bell Telephone Labor Inc Microwave ferrite devices
DE1179850B (en) * 1958-12-29 1964-10-15 Western Electric Co Process for the preparation of ferrite compositions
US3042619A (en) * 1959-12-31 1962-07-03 Ibm Ferrite composition for bistable magnetic circuits
US3097979A (en) * 1960-12-05 1963-07-16 Union Carbide Corp Magnetic flux-gas shielded metal arc welding
US3150095A (en) * 1961-11-24 1964-09-22 Ibm Ferrite ceramic compositions and method of preparation
DE1696412B1 (en) * 1962-12-21 1970-06-11 Ibm Process for the production of ferrite cores with a rectangular hysteresis loop and spinel structure
DE1278921B (en) * 1963-09-06 1968-09-26 Siemens Ag Process to improve the temporal permeability constancy of manganese-zinc-ferrite cores

Also Published As

Publication number Publication date
FR1091402A (en) 1955-04-12

Similar Documents

Publication Publication Date Title
US3565806A (en) Manganese zinc ferrite core with high initial permeability
GB804693A (en) Ferromagnetic ceramic materials with hysteresis loops of rectangular shape
GB760035A (en) Improvements in the manufacture of ferromagnetic spinels with square hysteresis loop
GB995374A (en) Permanent magnet materials having a strontium ferrite base and processes for their preparation
US2734034A (en) Magnetic compositions
GB923991A (en) Oxide magnetic material
GB679349A (en) Improvements in and relating to magnetically soft mixed ferrite materials
GB823971A (en) Improvements in or relating to ferromagnetic ferrite materials
GB954775A (en) Improvements in methods of manufacturing sintered ferrite bodies
GB874451A (en) Improvements in or relating to manganese ferrites
GB759245A (en) Improvements in or relating to methods of manufacturing non-metallic magnetic cores having a substantially rectangular hysteresis loop
GB671788A (en) Ferromagnetic bodies having high insulating properties
GB631739A (en) Improvements in or relating to electric resistances and the manufacture thereof
GB763494A (en) Improvements in or relating to magnetic ferrites
GB820853A (en) Improvements in or relating to methods of manufacturing non-metallic ferromagnetic materials
CN113880554A (en) Method for preparing black ceramic material
ES219076A1 (en) Method of manufacturing a magnet core having an approximately rectangular hysteresis loop
JPS6265969A (en) Mn-zn-co type ferrite
GB1060598A (en) Ferromagnetic cores and processes for the preparation thereof
ES288241A1 (en) Method of manufacturing a magnetic nucleus (Machine-translation by Google Translate, not legally binding)
GB677418A (en) Ceramic ferromagnetic body with high maximum permeability
GB789099A (en) Improvements in or relating to a method of producing magnetic cores
GB979953A (en) Ferromagnetic ferrite materials and methods of fabrication for use at microwave frequencies
GB669571A (en) Improvements in or relating to magnet cores for electromagnetic devices
GB881648A (en) High purity, high permeability manganese ferrite