GB989389A - Ferromagnetic ferrite core and method of manufacture thereof - Google Patents

Ferromagnetic ferrite core and method of manufacture thereof

Info

Publication number
GB989389A
GB989389A GB4821262A GB4821262A GB989389A GB 989389 A GB989389 A GB 989389A GB 4821262 A GB4821262 A GB 4821262A GB 4821262 A GB4821262 A GB 4821262A GB 989389 A GB989389 A GB 989389A
Authority
GB
United Kingdom
Prior art keywords
temperature
sintered
atmosphere
degrees
hours
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
GB4821262A
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Publication of GB989389A publication Critical patent/GB989389A/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
    • C04B35/2616—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 lithium
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Soft Magnetic Materials (AREA)
  • Magnetic Ceramics (AREA)

Abstract

989,389. Magnetic compositions. RADIO CORPORATION OF AMERICA. Dec. 20, 1962 [Jan. 12, 1962], No. 48212/62. Heading H1H. A ferromagnetic core having a squareness ratio of 0À70 and a Curie temperature of at least 590‹ C. comprises a ceramic of sintered particles having the nolal composition: where Me is at least one of the metals Cd, Zn Mg, Mo, w is from 0À00 to 0À15, x is from 0À005 to 0À55 when Me is Cd, Zn or Mg, and from 0À005 to 0À02 when Me is Mo, y is from 2À35 to 2À50. In preparation a mixture of oxides or compounds yielding the composition is calcined in air at between 800‹ and 1000‹ C. for four hours, attrited and dried, mixed with a binder, screened through an 80 mesh screen, pressed into toroidal cores, sintered at between 1050 degrees and 1150 degrees for 1 to 24 hours in an atmosphere consisting of an inert gas and oxygen in the volumetric ratio of 9 : 1 to 79 : 1, annealed in an atmosphere containing 4 to 6 parts N 2 to 1 part O 2 at a temperature between 900‹ and 1100‹ C., preferably lower than the sintering temperature, and cooled to room temperature in the annealing atmosphere. The annealing may be performed after cooling the sintered body to room temperature. The inert gas may be N 2 , A, Ne, He, or mixtures thereof.
GB4821262A 1962-01-12 1962-12-20 Ferromagnetic ferrite core and method of manufacture thereof Expired GB989389A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16581262A 1962-01-12 1962-01-12

Publications (1)

Publication Number Publication Date
GB989389A true GB989389A (en) 1965-04-14

Family

ID=22600583

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4821262A Expired GB989389A (en) 1962-01-12 1962-12-20 Ferromagnetic ferrite core and method of manufacture thereof

Country Status (5)

Country Link
DE (1) DE1255558B (en)
FR (1) FR1343330A (en)
GB (1) GB989389A (en)
NL (2) NL287676A (en)
SE (1) SE304336B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5057738A (en) * 1989-05-26 1991-10-15 U.S. Philips Corporation Soft magnetic mgmnzn-ferrite material, deflection ring manufactured from said material, and as a cathode-ray tube comprising a deflection coil having such a deflection ring

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1299667A (en) * 1969-05-06 1972-12-13 Hitachi Ltd Memory cores having rectangular hysteresis loop characteristics and method of manufacturing the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL77389C (en) * 1949-04-28 1955-02-15
NL82272C (en) * 1953-12-21 1956-08-15
NL82273C (en) * 1953-12-21 1956-08-15

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5057738A (en) * 1989-05-26 1991-10-15 U.S. Philips Corporation Soft magnetic mgmnzn-ferrite material, deflection ring manufactured from said material, and as a cathode-ray tube comprising a deflection coil having such a deflection ring

Also Published As

Publication number Publication date
DE1255558B (en) 1967-11-30
FR1343330A (en) 1963-11-15
SE304336B (en) 1968-09-23
NL139619C (en) 1974-01-15
NL139619B (en) 1973-08-15
NL287676A (en) 1965-02-25

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