FR2094608A5 - Polycrystalline garnet ferrite - having negligible magnetic losses over uhf ranges - Google Patents

Polycrystalline garnet ferrite - having negligible magnetic losses over uhf ranges

Info

Publication number
FR2094608A5
FR2094608A5 FR7023792A FR7023792A FR2094608A5 FR 2094608 A5 FR2094608 A5 FR 2094608A5 FR 7023792 A FR7023792 A FR 7023792A FR 7023792 A FR7023792 A FR 7023792A FR 2094608 A5 FR2094608 A5 FR 2094608A5
Authority
FR
France
Prior art keywords
mhz
magnetic losses
losses over
polycrystalline garnet
garnet ferrite
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
FR7023792A
Other languages
French (fr)
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR7023792A priority Critical patent/FR2094608A5/en
Application granted granted Critical
Publication of FR2094608A5 publication Critical patent/FR2094608A5/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
    • C04B35/2675—Other ferrites containing rare earth metals, e.g. rare earth ferrite garnets
    • 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

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)

Abstract

Polycrystalline garnet ferrites of general compsn. Y3-3xGd3xFe5-5y-2uAl5yCouSiuO12 (where O x =0.6; O = y =0.24; 0.09 = u =0.25) and which exhibit negligeably low magnetic losses over frequency ranges at U.H.F. whilst maintaining relative permeability >1. In partic. the low loss regions for partic. cpds. are:- Y3Fe4.8Coo.1Sio.1O12 is approx 1200 MHz; Y3Fe4.5Coo.25 Sio.25 O12 1100-1500MHz; Y1.5Gd1.5Fe4.8Coo.1SiOo.1 O12 1000-2000MHz; Y1.5Gd1.5Fe4.7Coo.15Sio.15O12 0.150 MHz and 1000-3000 MHz; Y2.7Gdo.3Fe3.8Al Coo.1Sio.O12 300-850 MHz.
FR7023792A 1970-06-26 1970-06-26 Polycrystalline garnet ferrite - having negligible magnetic losses over uhf ranges Expired FR2094608A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7023792A FR2094608A5 (en) 1970-06-26 1970-06-26 Polycrystalline garnet ferrite - having negligible magnetic losses over uhf ranges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7023792A FR2094608A5 (en) 1970-06-26 1970-06-26 Polycrystalline garnet ferrite - having negligible magnetic losses over uhf ranges

Publications (1)

Publication Number Publication Date
FR2094608A5 true FR2094608A5 (en) 1972-02-04

Family

ID=9057872

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7023792A Expired FR2094608A5 (en) 1970-06-26 1970-06-26 Polycrystalline garnet ferrite - having negligible magnetic losses over uhf ranges

Country Status (1)

Country Link
FR (1) FR2094608A5 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337521A (en) * 1979-12-26 1982-06-29 Bell Telephone Laboratories, Incorporated Advantageous garnet based devices
US4354254A (en) * 1980-11-07 1982-10-12 Bell Telephone Laboratories, Incorporated Devices depending on garnet materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337521A (en) * 1979-12-26 1982-06-29 Bell Telephone Laboratories, Incorporated Advantageous garnet based devices
US4354254A (en) * 1980-11-07 1982-10-12 Bell Telephone Laboratories, Incorporated Devices depending on garnet materials

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Legal Events

Date Code Title Description
ST Notification of lapse