JPS5556093A - Production of star ruby or star sapphire - Google Patents

Production of star ruby or star sapphire

Info

Publication number
JPS5556093A
JPS5556093A JP12706878A JP12706878A JPS5556093A JP S5556093 A JPS5556093 A JP S5556093A JP 12706878 A JP12706878 A JP 12706878A JP 12706878 A JP12706878 A JP 12706878A JP S5556093 A JPS5556093 A JP S5556093A
Authority
JP
Japan
Prior art keywords
star
microcrystals
central part
ruby
infrared rays
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
JP12706878A
Other languages
Japanese (ja)
Inventor
Akihiko Kawachi
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 JP12706878A priority Critical patent/JPS5556093A/en
Publication of JPS5556093A publication Critical patent/JPS5556093A/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 high quality products of a large size in a high yield by periodically changing the output of infrared rays in production of star ruby and star sapphire by concentrating infrared rays on a sintered raw material rod followed by crystallization.
CONSTITUTION: Infrared rays from halogen lamp 2 or a xenon lamp are concentrated on sintered rod 4 of corundum uniformly contg. titanium oxide with spheroidal mirror 1 to form melting zone 3, and rod 4 is slowly lowered to obtain crystal 5. The resulting crystal is further heat treated to form needlelike microcrystals. At this time, the infrared output of lamp 2 is periodically changed to raise the temp. of the central part, so the microcrystals are prevented from gathering on the central part. Thus, the microcrystals are almost uniformly distributed in the central part and the peripheral part, resulting in star ruby or star sapphire having a large diameter and a perfect star.
COPYRIGHT: (C)1980,JPO&Japio
JP12706878A 1978-10-16 1978-10-16 Production of star ruby or star sapphire Pending JPS5556093A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12706878A JPS5556093A (en) 1978-10-16 1978-10-16 Production of star ruby or star sapphire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12706878A JPS5556093A (en) 1978-10-16 1978-10-16 Production of star ruby or star sapphire

Publications (1)

Publication Number Publication Date
JPS5556093A true JPS5556093A (en) 1980-04-24

Family

ID=14950783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12706878A Pending JPS5556093A (en) 1978-10-16 1978-10-16 Production of star ruby or star sapphire

Country Status (1)

Country Link
JP (1) JPS5556093A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5945998A (en) * 1982-08-31 1984-03-15 Seiko Epson Corp Preparation of corundum
US4948006A (en) * 1986-12-02 1990-08-14 Dai Nippon Insatsu Kabushiki Kaisha Container with metallic cover and method of manufacturing the same
US5257709A (en) * 1988-03-29 1993-11-02 Dai Nippon Insatsu Kabushiki Kaisha Container provided with metallic cover and method and apparatus for manufacturing the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5945998A (en) * 1982-08-31 1984-03-15 Seiko Epson Corp Preparation of corundum
JPH0355436B2 (en) * 1982-08-31 1991-08-23
US4948006A (en) * 1986-12-02 1990-08-14 Dai Nippon Insatsu Kabushiki Kaisha Container with metallic cover and method of manufacturing the same
US5257709A (en) * 1988-03-29 1993-11-02 Dai Nippon Insatsu Kabushiki Kaisha Container provided with metallic cover and method and apparatus for manufacturing the same
US5584634A (en) * 1988-03-29 1996-12-17 Dai Nippon Insatsu Kabushiki Kaisha Container provided with metallic cover and method and apparatus for manufacturing the same

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