| 摘要 |
PURPOSE:To advantageously produce a colorless, transparent high-quality single- crystal diamond in the synthesis thereof employing temp. difference process by a method where Ti, etc., are added as nitrogen getter to a solvent metal, a metal plate such as made of Al is interposed between solvent metal and seed crystal and, in this condition, the synthesis of the diamond is started. CONSTITUTION:In the synthesis of a single crystal diamond employing temp. difference process, one or more metals selected as nitrogen getter from among Ti, Zr, Hf, V, Nb and Ta are added to a solvent metal 2, a metal plate 3 consisting of one or more metals selected from among Al, Ga, In, Tl, Sn and Pb is interposed between the solvent metal 2 and seed crystal 4 and, in this condition, the diamond synthesis is started. Since, in this way, a colorless, transparent high quality IIa type diamond almost free from inclusion can be synthesized inexpensively and stably, a synthetic diamond useable in accessory or optical part application can be produced advantageously. |
