SAPPHIRE SINGLE CRYSTAL CAPABLE OF DEVELOPING COLOR FROM YELLOW GREEN TO SKY BLUE

摘要

PROBLEM TO BE SOLVED: To provide a sapphire single crystal capable of developing a color from yellow green to blue sapphire.;SOLUTION: The sapphire single crystal contains 0.5-5.0 wt.% iron oxide, 0.04-3.0 wt.% titanium oxide and 0.5-5.0 wt.% nickel oxide in terms of an oxide in a matrix Al₂O₃ and a part of iron, titanium and nickel are ionized and dissolved as solid.;COPYRIGHT: (C)2008,JPO&INPIT