GB1515543A - Method for producing r-plane single crystal alpha alumina - Google Patents

Method for producing r-plane single crystal alpha alumina

Info

Publication number
GB1515543A
GB1515543A GB27222/75A GB2722275A GB1515543A GB 1515543 A GB1515543 A GB 1515543A GB 27222/75 A GB27222/75 A GB 27222/75A GB 2722275 A GB2722275 A GB 2722275A GB 1515543 A GB1515543 A GB 1515543A
Authority
GB
United Kingdom
Prior art keywords
unicrystalline
seed rod
melt
alumina
producing
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
GB27222/75A
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Publication of GB1515543A publication Critical patent/GB1515543A/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
    • C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
    • 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
    • C30B29/20—Aluminium oxides

Landscapes

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

Abstract

1515543 Unicrystalline α-Al 2 O 3 UNION CARBIDE CORP 27 June 1975 [28 June 1974] 27222/75 Heading C1A Massive unicrystalline α-Al 2 O 3 is produced by:-(i) melting alumina by heating it to at least 2040‹C with at least one oxide selected from the oxides of Cr, Fe and Mg, the aggregate of the oxides being sufficient to provide at least 90 ppm by wt. of metal ion and sufficient to provide a unicrystalline product of substantially circular cross-section; (ii) inserting a seed rod of unicrystalline α-Al 2 O 3 having an orientation such that its longitudinal axis is normal to an R-plane of the seed rod into the melt; (iii) maintaining an atmosphere over the melt which is substantially chemically inert to the melt; (iv) withdrawing the seed rod from the melt such that alumina is solidified and crystallized on the seed rod to form a massive unicrystalline alpha-alumina product of increasing length and substantially circular in cross-section having a growth axis common with the longitudinal axis of the seed rod.
GB27222/75A 1974-06-28 1975-06-27 Method for producing r-plane single crystal alpha alumina Expired GB1515543A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US48425774A 1974-06-28 1974-06-28

Publications (1)

Publication Number Publication Date
GB1515543A true GB1515543A (en) 1978-06-28

Family

ID=23923402

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27222/75A Expired GB1515543A (en) 1974-06-28 1975-06-27 Method for producing r-plane single crystal alpha alumina

Country Status (4)

Country Link
JP (1) JPS5118999A (en)
DE (1) DE2528585C3 (en)
FR (1) FR2276094A1 (en)
GB (1) GB1515543A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113825577A (en) * 2019-05-13 2021-12-21 赛峰飞机发动机公司 Mould for manufacturing a component by casting metal and epitaxial growth and related manufacturing process

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2702145C3 (en) * 1976-02-09 1981-06-04 Union Carbide Corp., 10017 New York, N.Y. Process for the production of a doped α-alumina single crystal oriented in the r-plane and having a circular cross-section
JP2006151745A (en) * 2004-11-29 2006-06-15 Kyocera Corp Method for producing single crystal and oxide single crystal obtained by using the same
JP4735334B2 (en) * 2006-03-02 2011-07-27 住友金属鉱山株式会社 Method for producing aluminum oxide single crystal
JP5888198B2 (en) * 2012-09-26 2016-03-16 住友金属鉱山株式会社 Sapphire single crystal manufacturing equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113825577A (en) * 2019-05-13 2021-12-21 赛峰飞机发动机公司 Mould for manufacturing a component by casting metal and epitaxial growth and related manufacturing process
CN113825577B (en) * 2019-05-13 2024-01-09 赛峰飞机发动机公司 Mold for manufacturing components by casting metal and epitaxial growth and related manufacturing process
US11878338B2 (en) 2019-05-13 2024-01-23 Safran Aircraft Engines Mould for manufacturing a component by pouring metal and epitaxial growth, and associated manufacturing method

Also Published As

Publication number Publication date
FR2276094A1 (en) 1976-01-23
DE2528585C3 (en) 1979-10-11
DE2528585A1 (en) 1976-01-08
JPS554690B2 (en) 1980-01-31
JPS5118999A (en) 1976-02-14
DE2528585B2 (en) 1979-02-22
FR2276094B1 (en) 1978-09-22

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19950626