GB1045260A - Garnet compositions - Google Patents

Garnet compositions

Info

Publication number
GB1045260A
GB1045260A GB13945/65A GB1394565A GB1045260A GB 1045260 A GB1045260 A GB 1045260A GB 13945/65 A GB13945/65 A GB 13945/65A GB 1394565 A GB1394565 A GB 1394565A GB 1045260 A GB1045260 A GB 1045260A
Authority
GB
United Kingdom
Prior art keywords
april
lies
hours
initial oxides
presintered
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
GB13945/65A
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
CSF Compagnie Generale de Telegraphie sans Fil 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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB1045260A publication Critical patent/GB1045260A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/025—Other inorganic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/32—Non-reciprocal transmission devices

Landscapes

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

Abstract

1,045,260. Magnetic compositions. CSFCOMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. April 1, 1965 [April 22, 1964], No. 13945/65. Heading H1H. A ferromagnetic garnet has the composition: 3[(1 - x) Y 2 O 3 x Gd 2 O 3 ] 5 (1 - z) Fe 2 O 3 . y MnO 2 . where x lies between 0À3 and 0.6 z lies between 0.005 and 0.020 and y is a sole percentage of the initial oxides lying between 0À1 and 1-0. In preparation the initial oxides are ground, dried, presintered at a temperature above 1000‹ C., preferably 1200‹ C., for 2 hours, reground, mixed with a polyvinyl alcohol solution to form a granulate pressed into shape, sintered in O 2 at between 1368‹ C. and 1385‹ C. for two hours, and cooled at a rate of 50‹ C. to 150‹ C. per hour. The material is suitable for microwave devices and exhibits high resistivity.
GB13945/65A 1964-04-22 1965-04-01 Garnet compositions Expired GB1045260A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR971828A FR1405866A (en) 1964-04-22 1964-04-22 Composition of garnets intended for the production of devices for transmitting electromagnetic waves at ultra high frequency

Publications (1)

Publication Number Publication Date
GB1045260A true GB1045260A (en) 1966-10-12

Family

ID=8828365

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13945/65A Expired GB1045260A (en) 1964-04-22 1965-04-01 Garnet compositions

Country Status (4)

Country Link
US (1) US3419496A (en)
FR (1) FR1405866A (en)
GB (1) GB1045260A (en)
NL (1) NL6505150A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE759910A (en) * 1969-12-06 1971-06-04 Philips Nv MAGNETISABLE SUBSTANCE FOR DETECTION AND / OR RECORDING OF ELECTROMAGNETIC RADIATION AND ELECTRONS
JP2504192B2 (en) * 1989-06-15 1996-06-05 株式会社村田製作所 Microwave / millimeter wave magnetic composition

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1174680A (en) * 1957-05-09 1959-03-13 Csf Improvements to manufacturing processes for ternary manganese and zinc ferrites
US3038861A (en) * 1957-12-27 1962-06-12 Bell Telephone Labor Inc Polycrystalline garnet materials
NL272060A (en) * 1960-12-06

Also Published As

Publication number Publication date
US3419496A (en) 1968-12-31
NL6505150A (en) 1965-10-25
FR1405866A (en) 1965-07-16

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