GB968253A - Monocrystalline metal oxide materials - Google Patents

Monocrystalline metal oxide materials

Info

Publication number
GB968253A
GB968253A GB3746362A GB3746362A GB968253A GB 968253 A GB968253 A GB 968253A GB 3746362 A GB3746362 A GB 3746362A GB 3746362 A GB3746362 A GB 3746362A GB 968253 A GB968253 A GB 968253A
Authority
GB
United Kingdom
Prior art keywords
per minute
litres per
samarium
yttrium oxide
boule
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
GB3746362A
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.)
NAT LEAD CO
NL Industries Inc
Original Assignee
NAT LEAD CO
NL Industries 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 NAT LEAD CO, NL Industries Inc filed Critical NAT LEAD CO
Publication of GB968253A publication Critical patent/GB968253A/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
    • C30B11/00—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method
    • C30B11/04—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method adding crystallising materials or reactants forming it in situ to the melt
    • C30B11/08—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method adding crystallising materials or reactants forming it in situ to the melt every component of the crystal composition being added during the crystallisation
    • C30B11/10—Solid or liquid components, e.g. Verneuil method
    • 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
    • C04B35/50—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare-earth compounds
    • C04B35/505—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare-earth compounds based on yttrium oxide
    • 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
    • C30B29/26—Complex oxides with formula BMe2O4, wherein B is Mg, Ni, Co, Al, Zn, or Cd and Me is Fe, Ga, Sc, Cr, Co, or Al

Abstract

Samarium or yttrium oxide in the form of a boule is prepared by melting powdered samarium or yttrium oxide of at least 99% purity in an oxy-hydrogen flame, samarium oxide at a temperature between 2320 DEG and 2370 DEG C., yttrium oxide at a temperature between 2430 DEG and 2480 DEG C., and allowing crystallization of the molten mass on a support. A preferred form of apparatus, illustrated in Fig. 1, consists of concentric tubes 1, 2, 3 vertically mounted over a pedestal 5, e.g. of firebrick. or zirconia contained in a chamber 6 e.g. of firebrick. In an example powdered samarium oxide together with 3 litres per minute of oxygen were <PICT:0968253/C1/1> fed through tube 1, while 3.5 litres per minute of oxygen were introduced through tube 2, and 27 litres per minute of hydrogen through tube 3. The oxide melted in the intensely heated zone of the flame at 2320 DEG C. and crystallized upon the pedestal as the latter was lowered, to form a boule of increasing diameter and length. After reaching the desired size the boule was removed and annealed at a temperature between 800 DEG C. and 1400 DEG C. In a second example powdered yttrium oxide with 4 litres per minute of oxygen, a further supply of 3 litres per minute of oxygen and 26 litres per minute of hydrogen were fed into the furnace and heated to 2430 DEG C. In both cases the crystalline product had a refractive index greater than 1.8, a hardness greater than 6.0, and allowed infra-red transmission up to about 9 microns.ALSO:Mononcrystalline samarium or yttrium oxide prepared by melting the powdered oxides in an oxy-hydrogen flame and crystallizing as a boule (see Division C1) may be cut as gemstones.
GB3746362A 1961-10-04 1962-10-03 Monocrystalline metal oxide materials Expired GB968253A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14291261A 1961-10-04 1961-10-04
US14999761A 1961-11-03 1961-11-03

Publications (1)

Publication Number Publication Date
GB968253A true GB968253A (en) 1964-09-02

Family

ID=26840525

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3719662A Expired GB969413A (en) 1961-10-04 1962-10-01 Mono crystalline metal oxide materials
GB3746362A Expired GB968253A (en) 1961-10-04 1962-10-03 Monocrystalline metal oxide materials

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB3719662A Expired GB969413A (en) 1961-10-04 1962-10-01 Mono crystalline metal oxide materials

Country Status (3)

Country Link
CH (1) CH433205A (en)
GB (2) GB969413A (en)
NL (1) NL283979A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111926293A (en) * 2019-04-26 2020-11-13 佳能株式会社 Optical device and method for manufacturing the same
CN116283291A (en) * 2023-03-20 2023-06-23 中国矿业大学(北京) Insulation tube preparation method
US11971520B2 (en) 2019-04-26 2024-04-30 Canon Kabushiki Kaisha Optical device and manufacturing method therefor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57211267A (en) * 1981-06-22 1982-12-25 Toshiba Corp Semiconductor device and manufacture thereof
US7616210B2 (en) 2005-08-23 2009-11-10 Canon Kabushiki Kaisha Memory apparatus and memory control method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111926293A (en) * 2019-04-26 2020-11-13 佳能株式会社 Optical device and method for manufacturing the same
US11971520B2 (en) 2019-04-26 2024-04-30 Canon Kabushiki Kaisha Optical device and manufacturing method therefor
CN116283291A (en) * 2023-03-20 2023-06-23 中国矿业大学(北京) Insulation tube preparation method
CN116283291B (en) * 2023-03-20 2024-02-23 中国矿业大学(北京) Insulation tube preparation method

Also Published As

Publication number Publication date
NL283979A (en)
GB969413A (en) 1964-09-09
CH433205A (en) 1967-04-15

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