| 摘要 |
PURPOSE:To prepare transparent diamond usable as the material of a decorative use and an optical part. CONSTITUTION:In the synthesis of diamond by a temp. difference method, an xFe-yCo-zAl alloy (wherein x, y and z are set so that y is 20<=y<=90 and z<=2 on a wt.% basis) is used as a solvent. When a very small amount of one or more kind of element selected from B, Ga, Be, In and Li is added to the xFe- yCo-zAl alloy, diamond having higher transparency can be obtained. Since a colorless and transparent artificial synthetic diamond showing no absorption of nitrogen within an infrared region can be inexpensively and stably prepared and, therefore, this artificial synthetic diamond can be used as a decorative product or an optical part. |
