GB968835A - Improvements in or relating to the production of ferrimagnetic ceramic materials - Google Patents

Improvements in or relating to the production of ferrimagnetic ceramic materials

Info

Publication number
GB968835A
GB968835A GB43094/59A GB4309459A GB968835A GB 968835 A GB968835 A GB 968835A GB 43094/59 A GB43094/59 A GB 43094/59A GB 4309459 A GB4309459 A GB 4309459A GB 968835 A GB968835 A GB 968835A
Authority
GB
United Kingdom
Prior art keywords
oxide
nickel
per cent
mol per
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
GB43094/59A
Inventor
Henley Frank Sterling
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB43094/59A priority Critical patent/GB968835A/en
Priority to BE598211A priority patent/BE598211R/en
Publication of GB968835A publication Critical patent/GB968835A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/10—Inorganic compounds or compositions
    • C30B29/16—Oxides
    • C30B29/22—Complex oxides
    • 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
    • C04B35/265—Compositions containing one or more ferrites of the group comprising manganese or zinc and one or more ferrites of the group comprising nickel, copper or cobalt
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
    • C30B15/10—Crucibles or containers for supporting the melt
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
    • C30B15/14—Heating of the melt or the crystallised materials

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Metallurgy (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

A single crystal of a ferrimagnetic ceramic material is pulled from a melt heated by induction in a metal crucible of high electrical and thermal conductivity having hollow walls through which cooling fluid is passed. The ferrimagnetic ceramic material may be nickel-zince ferrite, cobalt ferrite, or yttrium oxide-ferric oxide. The nickel-zinc ferrite may contain 25 mol per cent nickel oxide, 25 mol per cent zinc oxide, and 50 mol per cent ferric oxide. The crucible may be of silver and may be formed of a number of adjacent tubes. Specifications 871,157 and 889,615 also are referred to.
GB43094/59A 1959-12-18 1959-12-18 Improvements in or relating to the production of ferrimagnetic ceramic materials Expired GB968835A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB43094/59A GB968835A (en) 1959-12-18 1959-12-18 Improvements in or relating to the production of ferrimagnetic ceramic materials
BE598211A BE598211R (en) 1959-12-18 1960-12-16 Method and apparatus for heat treatment of semiconductor products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB43094/59A GB968835A (en) 1959-12-18 1959-12-18 Improvements in or relating to the production of ferrimagnetic ceramic materials

Publications (1)

Publication Number Publication Date
GB968835A true GB968835A (en) 1964-09-02

Family

ID=10427298

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43094/59A Expired GB968835A (en) 1959-12-18 1959-12-18 Improvements in or relating to the production of ferrimagnetic ceramic materials

Country Status (2)

Country Link
BE (1) BE598211R (en)
GB (1) GB968835A (en)

Also Published As

Publication number Publication date
BE598211R (en) 1961-06-16

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