A method and equipment of producing graphite and metallic catalyst composite for diamond synthesis

摘要

This invention releases the preparation method and equipment of graphite and catalyst composite for a kind of synthetic diamond. Firstly the clean graphite particle shall be placed into the heating chamber (6) for pre-heating, the lower limit of the heating temperature shall be higher than the boiling point of the coated carbonyl metal complex und the upper limit of the heating temperature shall be set according to the thickness of the coating needed; secondly, the heated graphite particle will be fed into the coating room (7) with vibrator or agitator (11) and the steam of carbonyl metal complex shall be input for coating; finally the coated graphite particle shall be fed into the cooling and passivation room (8) for cooling and passivation of the discharging materials or enter the next round circle of heating and coating. As to the graphite and catalyst composite prepared by this invention, the surface of each graphite particle is plated with metal layer and the continuous metallic contact is formed between the particles of the synthetic cylinder prepared by it. In synthesis, it is easy to form the continuous metallic film so as to continuously feed the carbon to the diamond crystal nucleus to promote the crystal nucleus growing into perfect diamond crystal.