GB1057543A - Method of growing lithium ferrite - Google Patents

Method of growing lithium ferrite

Info

Publication number
GB1057543A
GB1057543A GB12304/64A GB1230464A GB1057543A GB 1057543 A GB1057543 A GB 1057543A GB 12304/64 A GB12304/64 A GB 12304/64A GB 1230464 A GB1230464 A GB 1230464A GB 1057543 A GB1057543 A GB 1057543A
Authority
GB
United Kingdom
Prior art keywords
nutrient
lithium ferrite
ratio
li2co3
fe2o3
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
GB12304/64A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB1057543A publication Critical patent/GB1057543A/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
    • C04B35/2691—Other ferrites containing alkaline metals
    • 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
    • C30B9/00—Single-crystal growth from melt solutions using molten solvents
    • C30B9/04—Single-crystal growth from melt solutions using molten solvents by cooling of the solution
    • C30B9/08—Single-crystal growth from melt solutions using molten solvents by cooling of the solution using other solvents
    • C30B9/12—Salt solvents, e.g. flux growth

Landscapes

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

Abstract

Single crystal lithium ferrite, Li0.5Fe2.5O4 is grown by heating a nutrient (e.g. Li2CO3 and Fe2O3) together with a flux of B2O3 and Pb to a temperature sufficient to dissolve the nutrient (e.g. 1200 DEG C.) and cooling at a controlled rate to precipitate the crystals. The weight ratio of B2O3:PbO is in the range 1 : 5.8 to 1 : 6.6 and the nutrient to flux ratio from 1 : 3.7 to 1 : 4. The Li2CO3 to Fe2O3 ratio may be from 1 : 2.8 to 1 : 3.7. In examples the starting ingredients are heated initially to 1000-1200 DEG C. and maintained there for 1 to 3 hours, the furnace is cooled rapidly to 850 DEG C., maintained there for 1 hour and controlled cooling at 1/2 to 5 DEG C per hour is applied until the temperature falls to approx. 500 DEG C. The lithium ferrite has a highly ordered structure and a spin wave line width of 0.5.
GB12304/64A 1963-04-03 1964-03-24 Method of growing lithium ferrite Expired GB1057543A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US270183A US3305301A (en) 1963-04-03 1963-04-03 Process for the growth of ordered lithium ferrite

Publications (1)

Publication Number Publication Date
GB1057543A true GB1057543A (en) 1967-02-01

Family

ID=23030257

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12304/64A Expired GB1057543A (en) 1963-04-03 1964-03-24 Method of growing lithium ferrite

Country Status (6)

Country Link
US (1) US3305301A (en)
JP (1) JPS4837790B1 (en)
DE (1) DE1219913B (en)
FR (1) FR1385230A (en)
GB (1) GB1057543A (en)
NL (1) NL140434B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386799A (en) * 1965-11-16 1968-06-04 Bell Telephone Labor Inc Growth of yttrium iron garnet
US3498836A (en) * 1966-04-25 1970-03-03 Ibm Method for obtaining single crystal ferrite films
US4093781A (en) * 1975-05-27 1978-06-06 Rockwell International Corporation Epitaxial, sodium-substituted lithium ferrite films

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2957827A (en) * 1957-04-30 1960-10-25 Bell Telephone Labor Inc Method of making single crystal garnets
US3079240A (en) * 1960-05-13 1963-02-26 Bell Telephone Labor Inc Process of growing single crystals

Also Published As

Publication number Publication date
FR1385230A (en) 1965-01-08
DE1219913B (en) 1966-06-30
JPS4837790B1 (en) 1973-11-13
NL140434B (en) 1973-12-17
NL6402751A (en) 1964-10-05
US3305301A (en) 1967-02-21

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