JPS5562890A - Production of alexandrite single crystal - Google Patents

Production of alexandrite single crystal

Info

Publication number
JPS5562890A
JPS5562890A JP13432578A JP13432578A JPS5562890A JP S5562890 A JPS5562890 A JP S5562890A JP 13432578 A JP13432578 A JP 13432578A JP 13432578 A JP13432578 A JP 13432578A JP S5562890 A JPS5562890 A JP S5562890A
Authority
JP
Japan
Prior art keywords
zone
crystal
interface
beo
feo
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.)
Pending
Application number
JP13432578A
Other languages
Japanese (ja)
Inventor
Hironao Kojima
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP13432578A priority Critical patent/JPS5562890A/en
Publication of JPS5562890A publication Critical patent/JPS5562890A/en
Pending 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
    • C30B13/00—Single-crystal growth by zone-melting; Refining by zone-melting
    • C30B13/16—Heating of the molten zone
    • C30B13/22—Heating of the molten zone by irradiation or electric discharge

Landscapes

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

Abstract

PURPOSE: To produce a high quality alexandrite single crystal assuming a dark green color under natural light and a red color under artificial light at a low cost in a short time by melting a rodlike high density sintered raw material consisting of a specified amt. of Al2O3, BeO and Cr2O3 or FeO with infrared rays followed by crystallization on the interface of the molten part.
CONSTITUTION: Halogen lamp 2 is set at one focus of spheroidal mirror 1, and rodlike high density sintered raw material 3 consisting of an equimolar amt. of Al2O3 and BeO and 0.05W5% of Cr2O3 or FeO at the other focus. Material 3 and seed crystal 5 are fixed to upper and lower rotary shafts 4, 6, respectively, and they are sealed in transparent quartz tube 7. Infrared rays from lamp 2 are concentrated on the tip of material 3 to form melting zone 8, and crystal 5 is contacted to zone 8. After an equilibrium state is attained, by moving shafts 4, 6 material 3 is melted at the interface between zone 8 and material 3, and crystallization takes place at the interface between zone 8 and crystal 5.
COPYRIGHT: (C)1980,JPO&Japio
JP13432578A 1978-10-31 1978-10-31 Production of alexandrite single crystal Pending JPS5562890A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13432578A JPS5562890A (en) 1978-10-31 1978-10-31 Production of alexandrite single crystal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13432578A JPS5562890A (en) 1978-10-31 1978-10-31 Production of alexandrite single crystal

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP5826387A Division JPS632899A (en) 1987-03-13 1987-03-13 Production of alexandrite single crystal

Publications (1)

Publication Number Publication Date
JPS5562890A true JPS5562890A (en) 1980-05-12

Family

ID=15125674

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13432578A Pending JPS5562890A (en) 1978-10-31 1978-10-31 Production of alexandrite single crystal

Country Status (1)

Country Link
JP (1) JPS5562890A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4634492A (en) * 1983-07-14 1987-01-06 Sumitomo Cement Co., Ltd. Chrysoberyl single crystal and method of producing the same
JPS632899A (en) * 1987-03-13 1988-01-07 Seiko Epson Corp Production of alexandrite single crystal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4634492A (en) * 1983-07-14 1987-01-06 Sumitomo Cement Co., Ltd. Chrysoberyl single crystal and method of producing the same
JPS632899A (en) * 1987-03-13 1988-01-07 Seiko Epson Corp Production of alexandrite single crystal
JPH0361635B2 (en) * 1987-03-13 1991-09-20 Seiko Epson Corp

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