JPS57191299A - Preparation of single crystal of corundum shedding asterism - Google Patents

Preparation of single crystal of corundum shedding asterism

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Publication number
JPS57191299A
JPS57191299A JP7599381A JP7599381A JPS57191299A JP S57191299 A JPS57191299 A JP S57191299A JP 7599381 A JP7599381 A JP 7599381A JP 7599381 A JP7599381 A JP 7599381A JP S57191299 A JPS57191299 A JP S57191299A
Authority
JP
Japan
Prior art keywords
single crystal
raw material
material bar
under
asterism
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.)
Granted
Application number
JP7599381A
Other languages
Japanese (ja)
Other versions
JPS5938192B2 (en
Inventor
Isamu Shindo
Hidenori Sakauchi
Shunji Takegawa
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.)
National Institute for Research in Inorganic Material
Original Assignee
National Institute for Research in Inorganic Material
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 National Institute for Research in Inorganic Material filed Critical National Institute for Research in Inorganic Material
Priority to JP7599381A priority Critical patent/JPS5938192B2/en
Publication of JPS57191299A publication Critical patent/JPS57191299A/en
Publication of JPS5938192B2 publication Critical patent/JPS5938192B2/en
Expired legal-status Critical Current

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  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

PURPOSE: To prepare a single crystal of corundum shedding asterism, by growing a blend of Al2O3 and TiO3 as a raw material bar under an nonoxidizing atmosphere to give a single crystal, annealing it further under an oxidizing atmosphere.
CONSTITUTION: A seed crystal is set under a raw material bar having a composition of Al2O3 and Ti2O3 in a molar ratio of 1:(0.0005W0.1) or a solvent having a meling point lower than that of the raw material bar is put in the middle of the raw material bar and the seed crystal, one end of the raw material bar is melted under heating directly or through the solvent, and a single crystal is grown by floating zone method to transfer the melt zone. The single crystal is then annealed under oxidizing atmosphere, so the TiO2 component is exsolved and precipitated, to give a single crystal of corundum shedding asterism. The growth of the single crystal is carried out under a reducing atmosphere with an oxygen partial pressure of ≤10-1atm, the prepared single crystal is used as a raw material bar, the growth of single crystal is repeated again, and the prepared single crystal is annealed under an oxidizing atmosphere, to give a single crystal of corumdum having improved quality.
COPYRIGHT: (C)1982,JPO&Japio
JP7599381A 1981-05-20 1981-05-20 Manufacturing method of corundum single crystal that emits starry colors Expired JPS5938192B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7599381A JPS5938192B2 (en) 1981-05-20 1981-05-20 Manufacturing method of corundum single crystal that emits starry colors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7599381A JPS5938192B2 (en) 1981-05-20 1981-05-20 Manufacturing method of corundum single crystal that emits starry colors

Publications (2)

Publication Number Publication Date
JPS57191299A true JPS57191299A (en) 1982-11-25
JPS5938192B2 JPS5938192B2 (en) 1984-09-14

Family

ID=13592306

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7599381A Expired JPS5938192B2 (en) 1981-05-20 1981-05-20 Manufacturing method of corundum single crystal that emits starry colors

Country Status (1)

Country Link
JP (1) JPS5938192B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60226499A (en) * 1984-04-24 1985-11-11 Seiko Epson Corp Synthesis of ruby single crystal
JPS60226498A (en) * 1984-04-19 1985-11-11 Seiko Epson Corp Preparation of starting material for single crystal
WO2024095040A1 (en) * 2022-11-02 2024-05-10 Levchenko Vladimir Viktorovich Method for improving colour characteristics and/or transparency of at least one natural corundum and in particular a ruby

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60226498A (en) * 1984-04-19 1985-11-11 Seiko Epson Corp Preparation of starting material for single crystal
JPS60226499A (en) * 1984-04-24 1985-11-11 Seiko Epson Corp Synthesis of ruby single crystal
JPH0310599B2 (en) * 1984-04-24 1991-02-14 Seiko Epson Corp
WO2024095040A1 (en) * 2022-11-02 2024-05-10 Levchenko Vladimir Viktorovich Method for improving colour characteristics and/or transparency of at least one natural corundum and in particular a ruby

Also Published As

Publication number Publication date
JPS5938192B2 (en) 1984-09-14

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