GB770838A - Improvements in or relating to non-metallic ferromagnetic materials and methods of manufacturing such materials - Google Patents

Improvements in or relating to non-metallic ferromagnetic materials and methods of manufacturing such materials

Info

Publication number
GB770838A
GB770838A GB17397/55A GB1739755A GB770838A GB 770838 A GB770838 A GB 770838A GB 17397/55 A GB17397/55 A GB 17397/55A GB 1739755 A GB1739755 A GB 1739755A GB 770838 A GB770838 A GB 770838A
Authority
GB
United Kingdom
Prior art keywords
materials
june
oxides
relating
manufacturing
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
GB17397/55A
Inventor
Boris Feertchack
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.)
Societe Anonyme de Telecommunications SAT
Original Assignee
Societe Anonyme de Telecommunications SAT
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 Societe Anonyme de Telecommunications SAT filed Critical Societe Anonyme de Telecommunications SAT
Publication of GB770838A publication Critical patent/GB770838A/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
    • C04B35/2658—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)
  • Magnetic Ceramics (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

770,838. Magnetic compositions. SOC. ANON. DE TELECOMMUNICATIONS. June 16, 1955 [June 23, 1954; Dec. 9, 1954], No. 17397/55. Class 38 (2). A magnetic composition having relatively uniform loss coefficients and initial permeability comprises Fe 2 O 3 , Cr 2 O 3 , MnO, ZnO, FeO in the following molecular percentages, 44-58, 1.7- 6.0, 19-27, 14-27, 0-10. Suitable proportions of the first four of these oxides are ballmilled with water to a mixture having particles less than 2 microns maximum dimension, compressed at 4 tons/sq. in., dried at 600‹ C., sintered at 1220-1320‹ C. for 3 to 5 hours, cooled slowly to 600‹ C. and then quickly to room temperature, all in air. Impurities such as oxides of Si, Al, Cu and other heavy metals and compounds of alkali metals may be tolerated.
GB17397/55A 1954-06-23 1955-06-16 Improvements in or relating to non-metallic ferromagnetic materials and methods of manufacturing such materials Expired GB770838A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1018776X 1954-06-23

Publications (1)

Publication Number Publication Date
GB770838A true GB770838A (en) 1957-03-27

Family

ID=9575251

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17397/55A Expired GB770838A (en) 1954-06-23 1955-06-16 Improvements in or relating to non-metallic ferromagnetic materials and methods of manufacturing such materials

Country Status (3)

Country Link
DE (1) DE1018776B (en)
FR (2) FR1107654A (en)
GB (1) GB770838A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1074482B (en) * 1960-01-28 Centre National De La Recherche Scientifique, Paris Process for the manufacture of shaped ferromagnetic !! Materials
US2962444A (en) * 1956-01-19 1960-11-29 Centre Nat Rech Scient Ferromagnetic ceramic materials
NL101598C (en) * 1956-05-02
US2950252A (en) * 1956-05-08 1960-08-23 Ibm Manganese chromium ferrite composition
US2987481A (en) * 1956-10-15 1961-06-06 Ibm Manganese-zinc ferrite
BE562891A (en) * 1956-12-14
BE563783A (en) * 1957-01-08
US3034988A (en) * 1958-08-22 1962-05-15 Du Pont Modified chromium oxide ferromagnetic compositions, their preparation and use
US3027327A (en) * 1957-10-08 1962-03-27 Gen Electric Preparation of ferromagnetic ferrite materials
US3066102A (en) * 1957-12-19 1962-11-27 Steatit Magnesia Ag Ferrite containing neodymium
US2986522A (en) * 1960-05-27 1961-05-30 Ibm Low flux density ferromagnetic material

Also Published As

Publication number Publication date
FR67089E (en) 1957-11-04
DE1018776B (en) 1957-10-31
FR1107654A (en) 1956-01-04

Similar Documents

Publication Publication Date Title
US2762777A (en) Permanent magnet and method of making the same
GB770838A (en) Improvements in or relating to non-metallic ferromagnetic materials and methods of manufacturing such materials
GB1143448A (en) Improvements in or relating to manganese-zinc-ferrites
US3640867A (en) Lithium-zinc ferrite composition with arsenic oxide or bismuth oxide additive
GB751623A (en) Improvements in or relating to ferromagnetic ceramic bodies
GB718204A (en) Ferromagnetic ferrite materials
GB644639A (en) Improvements in or relating to magnetic materials
GB683722A (en) Ferromagnetic materials
GB833053A (en) Improvements in or relating to ferro-magnetic ferrite materials
GB923991A (en) Oxide magnetic material
GB823971A (en) Improvements in or relating to ferromagnetic ferrite materials
GB849217A (en) Improvements in or relating to magnetic ferrites
GB839860A (en) Improvements in or relating to ferromagnetic ferrite materials
GB842005A (en) Improvements in or relating to ferromagnetic materials
GB862135A (en) Improvements in or relating to ferromagnetic materials, more particularly for use inmicro-wave equipment
GB759245A (en) Improvements in or relating to methods of manufacturing non-metallic magnetic cores having a substantially rectangular hysteresis loop
GB763494A (en) Improvements in or relating to magnetic ferrites
GB820853A (en) Improvements in or relating to methods of manufacturing non-metallic ferromagnetic materials
GB803625A (en) Improvements in or relating to magnetisable cores made of sintered oxides and methods of manufacturing such cores
GB789099A (en) Improvements in or relating to a method of producing magnetic cores
GB756374A (en) A method for the manufacture of ferrite cores
GB764118A (en) Improvements in or relating to methods of manufacturing non-metallic magnetic cores having a substantially rectangular hysteresis loop
GB1029024A (en) Improvements in or relating to ferromagnetic ferrites incorporating lithium
GB740755A (en) Improvements in and relating to ferrite magnetic materials
GB821633A (en) Improvements in or relating to a method of manufacturing non-metallic ferromagnetic bodies and to bodies thus manufactured