| 摘要 |
PURPOSE:To produce an artificial ruby crystal having large diameter, stably in high rate of growth, by using a raw material of ruby doped with a specific metal oxide in the titled preparation process, thereby changing the spectroscopic properties of the crystal. CONSTITUTION:One or more metal oxides such as TiO2, FeO, Fe2O3, SiO2, V2O5, etc. are used as a dopant. A ruby raw material composed of about 96% of aluminium oxide and about 2.5% of chromium oxide is doped with about 1.5% of the above metal oxides, and is sintered at about 1,650 deg.C for about 5hr. The obtained sintered product is set together with a seed crystal in an FZ-furnace, and the crystal growth is carried out in the atmosphere of argon or nitrogen gas. |
