JPS5562890A - Production of alexandrite single crystal - Google Patents
Production of alexandrite single crystalInfo
- 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
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
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)
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 |
-
1978
- 1978-10-31 JP JP13432578A patent/JPS5562890A/en active Pending
Cited By (3)
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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