Patent ID: 8088436

Claim:
A method of coating graphite particles with a metallic catalyst layer for diamond synthesis comprising following steps: a. placing graphite particles use for diamond synthesis in a heating chamber for preheating the graphite particles in protection of vacuum or nitrogen or argon gas; b. feeding the heated graphite particles into a plating chamber with vibrator or agitator, then opening an inlet switch to feed steam of metal carbonyl complex into the planting chamber; after that, operating the vibrator or agitator, the metal carbonyl complex being decomposed to form a metal catalyst layer on the surface of the graphite particles evenly by the heat released from the pre-heated graphite particles; c. feeding the plated graphite particles coated with a metallic catalyst layer into a cooling and passivation chamber for cooling and passivation or feeding the graphite particles coated with a metallic catalyst layer into a next round of heating and coating until the coated graphite particles with a metallic catalyst layer having a required coating thickness; finally, cooling, passivating and packaging the graphite particles coated with a metallic catalyst layer.