PRODUCTION METHOD OF RUTILE (TiO2) SINGLE CRYSTAL, RUTILE (TiO2) SINGLE CRYSTAL, AND ORNAMENT OBTAINED BY USING THE SINGLE CRYSTAL

摘要

PROBLEM TO BE SOLVED: To provide a production method of a rutile (TiO₂) single crystal, by which a colored rutile (TiO₂) single crystal having transparent feeling, especially a blue rutile (TiO₂) single crystal can be produced by controlling the light transmittance of the rutile (TiO₂) single crystal.;SOLUTION: In the production method of the rutile (TiO₂) single crystal, comprising forming a molten zone by melting a joined part of a rutile raw material rod and a rutile seed crystal in a prescribed growth atmosphere and then growing the rutile (TiO₂) single crystal while moving the molten zone, the color of the rutile (TiO₂) single crystal is adjusted by adding a different kind of metal ion having a lower atomic valence than that (+4) of titanium into the molten zone to change the light transmittance of the rutile (TiO₂) single crystal being grown. At this time, the different kind of metal ion is added into the molten zone so that the concentration of the different kind of metal ion becomes within a range of 0.005-1.0 atom% based on all metal ions.;COPYRIGHT: (C)2009,JPO&INPIT