GB1382555A - Garnet structure ferrimagnetic material having a saturation magneti sation less than 1000 gauss for microwave applications - Google Patents

Garnet structure ferrimagnetic material having a saturation magneti sation less than 1000 gauss for microwave applications

Info

Publication number
GB1382555A
GB1382555A GB1500773A GB1500773A GB1382555A GB 1382555 A GB1382555 A GB 1382555A GB 1500773 A GB1500773 A GB 1500773A GB 1500773 A GB1500773 A GB 1500773A GB 1382555 A GB1382555 A GB 1382555A
Authority
GB
United Kingdom
Prior art keywords
gauss
less
ferrimagnetic material
garnet structure
screening
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
GB1500773A
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
Publication of GB1382555A publication Critical patent/GB1382555A/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
    • C04B35/2641—Compositions containing one or more ferrites of the group comprising rare earth metals and one or more ferrites of the group comprising alkali metals, alkaline earth metals or lead
    • 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

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

1382555 Magnetic garnet THOMSON-CSF 28 March 1973 [31 March 1972] 15007/73 Heading C1J A polycrystalline ferrimagnetic material of garnet structure has the general formula where 0À5<x#0À8, 0<y#0À12, 0<z#0À4, and e is close to 0 (residual lack of stoichiometry). The examples illustrate many compositions where x varies from 0À6 to 0À8, z from 0À2 to 0À4 and y from 0À02 to 0À12. The material may be prepared by mixing the raw materials, crushing in water, drying, screening, firing in an oxidizing atmosphere at 1150-1250‹ C. for ¢-2 hours, again crushing, drying and screening, mixing with organic binder, further drying and screening, pressing at 1 ton/cm.<SP>2</SP> and finally sintering at 1350-1500‹ C. in an oxidizing atmosphere.
GB1500773A 1972-03-31 1973-03-28 Garnet structure ferrimagnetic material having a saturation magneti sation less than 1000 gauss for microwave applications Expired GB1382555A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7211633A FR2177632B1 (en) 1972-03-31 1972-03-31

Publications (1)

Publication Number Publication Date
GB1382555A true GB1382555A (en) 1975-02-05

Family

ID=9096230

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1500773A Expired GB1382555A (en) 1972-03-31 1973-03-28 Garnet structure ferrimagnetic material having a saturation magneti sation less than 1000 gauss for microwave applications

Country Status (7)

Country Link
US (1) US3886077A (en)
JP (1) JPS498798A (en)
BE (1) BE797370A (en)
DE (1) DE2315558C3 (en)
FR (1) FR2177632B1 (en)
GB (1) GB1382555A (en)
IT (1) IT980076B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4929077B1 (en) * 1970-10-12 1974-08-01
JPS6024568B2 (en) * 1975-05-19 1985-06-13 日立金属株式会社 Gd, Ca, Sn substituted yttrium iron garnet
JPS5642311A (en) * 1979-09-17 1981-04-20 Hitachi Ltd Garnet film for magnetic bubble
IT1213266B (en) * 1984-02-21 1989-12-14 Selenia Ind Elettroniche METHOD FOR THE SUPPRESSION OF MAGNETOSTATIC WAVES IN MAGNETIC GARNET FILM FOR MICROWAVE CIRCUITS
FR2586134B1 (en) * 1985-08-06 1989-12-01 Thomson Csf TEMPERATURE STABLE MAGNETIC MATERIAL FOR MICROWAVE USE AND MANUFACTURING METHOD THEREOF
KR100208882B1 (en) * 1996-01-11 1999-07-15 . Magnetostatic wave device
KR0171371B1 (en) * 1996-10-31 1999-01-15 양승택 A magnetic ceramic composition for microwave device, a magnetic ceramic for microwave devices therefrom and a preparation method thereof
US20050260331A1 (en) * 2002-01-22 2005-11-24 Xingwu Wang Process for coating a substrate
JP2005097044A (en) * 2003-09-25 2005-04-14 Alps Electric Co Ltd Garnet ferrite for irreversible circuit element and irreversible circuit element using the same
FR3044308B1 (en) * 2015-11-27 2017-11-24 Thales Sa FERRITE MATERIAL OF GRENATE TYPE WITH VERY LOW SATURATION MAGNET AND COMPONENT COMPRISING SAID MATERIAL WITH VERY LOW SATURATION MAGNETIZATION
CN114436637B (en) * 2022-03-07 2023-05-05 西南应用磁学研究所(中国电子科技集团公司第九研究所) High-dielectric constant high-power microwave ferrite material and preparation method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3479292A (en) * 1965-12-20 1969-11-18 Bell Telephone Labor Inc Manufacture of garnet ceramic
US3563897A (en) * 1968-04-03 1971-02-16 Trans Tech Inc Ferromagnetic garnet with stress insensitive b-h loop and method of making same
FR2041241A5 (en) * 1969-04-17 1971-01-29 Thomson Csf

Also Published As

Publication number Publication date
FR2177632B1 (en) 1978-03-03
US3886077A (en) 1975-05-27
FR2177632A1 (en) 1973-11-09
IT980076B (en) 1974-09-30
JPS498798A (en) 1974-01-25
DE2315558C3 (en) 1981-02-26
BE797370A (en) 1973-07-16
DE2315558A1 (en) 1973-10-04
DE2315558B2 (en) 1980-06-04

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee