| 摘要 |
PURPOSE:To manufacture easily diamond while inhibiting the spontaneous formation of diamond nuclei by mixing a carbonaceous substance with a metal for synthesizing diamond and diamond particles for seeds and by bringing the mixture into a reaction at a specified high temp. under a specified high pressure. CONSTITUTION:Artificial graphite as a starting material for diamond and a metal such as Fe, Co, Ni, Rh, Ru, Pd, Os, Ir, Pt, Cr, Ta or Mn as a flux for dissolving the graphite are laminated, and plural diamond particles of about 500mum size for seeds are arranged at the boundary part. A vessel contg. them is put in a superhigh temp. and pressure apparatus, and it is heated to a temp. above the temp. at which graphite reacts with said metal to cause recrystallization while applying a pressure below the minimum pressure required to cause spontaneous formation of diamond nuclei from recrystallized graphite. The artificial graphite is first recrystallized, and the diamond for seeds is grown while inhibiting the spontaneous formation of diamond nuclei. Thus, diamond particles are easily manufactured. |
