GB595445A - Annealing single crystals of synthetic corundum - Google Patents

Annealing single crystals of synthetic corundum

Info

Publication number
GB595445A
GB595445A GB17907/45A GB1790745A GB595445A GB 595445 A GB595445 A GB 595445A GB 17907/45 A GB17907/45 A GB 17907/45A GB 1790745 A GB1790745 A GB 1790745A GB 595445 A GB595445 A GB 595445A
Authority
GB
United Kingdom
Prior art keywords
synthetic corundum
single crystals
annealing single
temperature
unicrystalline
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
GB17907/45A
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.)
Linde Air Products Co
Original Assignee
Linde Air Products Co
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 Linde Air Products Co filed Critical Linde Air Products Co
Publication of GB595445A publication Critical patent/GB595445A/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
    • 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

595,445. Gems. LINDE AIR PRODUCTS CO. July 13, 1945, No. 17907. Convention date, Sept. 29, 1944. Drawings to Specification. [Class 43] A unicrystalline body of synthetic corundum is annealed to improve its resistance to splitting by heating it to between 1600‹ C. and 2000‹C., holding it at that temperature for a while and then cooling it to room temperature. The body should be cooled slowly to between 1000‹ C. and 1500‹ C. at a progressively increasing rate over a period of time greater than 2 hours, the rate thereafter being greatly increased so long as it is not sufficiently rapid to cause breakage. A formula is given for a suitable cooling curve.
GB17907/45A 1944-09-29 1945-07-13 Annealing single crystals of synthetic corundum Expired GB595445A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US595445XA 1944-09-29 1944-09-29

Publications (1)

Publication Number Publication Date
GB595445A true GB595445A (en) 1947-12-04

Family

ID=22023659

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17907/45A Expired GB595445A (en) 1944-09-29 1945-07-13 Annealing single crystals of synthetic corundum

Country Status (1)

Country Link
GB (1) GB595445A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4587035A (en) * 1985-05-20 1986-05-06 Union Carbide Corporation Process for enhancing Ti:Al2 O3 tunable laser crystal fluorescence by annealing
US5277366A (en) * 1992-07-09 1994-01-11 Ursic Thomas A High pressure fluid jet orifice made of oxygen enhanced sapphire and process for making same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4587035A (en) * 1985-05-20 1986-05-06 Union Carbide Corporation Process for enhancing Ti:Al2 O3 tunable laser crystal fluorescence by annealing
US5277366A (en) * 1992-07-09 1994-01-11 Ursic Thomas A High pressure fluid jet orifice made of oxygen enhanced sapphire and process for making same

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