Preparing method and device of composite material of black lead for synthesizing diamond and catalyst

Abstract

The invention discloses a method for preparing graphite-catalyst composite material used to compose diamond, and relative device. The inventive method comprises that first arranges clean graphite particles into a heating room (6) to be preheated while the low limit of heating temperature is higher than the boiling point of plated carbonyl metal complex and the high limit is designed according to plated thickness, then feeds the heated graphite particles into a plating room (7) with a vibrator or mixer (11), feeds carbonyl metal complex steam to plate, at last feeds the graphite particles into a cooling inactivating room (8) to be cooled and inactivated to be fed out or fed into next cycle. The inventive graphite-catalyst composite material has metal layer on the face of each graphite particle, with continuous metal contact between the particles in composite rod, while the invention can realize continuous catalyst metal membrane in composition, and continuously feed carbon source into diamond crystal nucleus to obtain complete crystal nucleus.

Description

technical field [0001] The invention relates to a preparation method and equipment for composite materials, in particular to a method of utilizing carbonyl metal complexes such as nickel tetracarbonyl, iron pentacarbonyl, dimanganese decacarbonyl, and dicobalt octacarbonyl to decompose on the surface of graphite particles to form nickel, iron, and manganese. , cobalt and other catalytic elements single-layer or composite coating method and equipment, especially a kind of heat that utilizes the heat brought by the heated graphite particles to decompose carbonyl nickel, iron, manganese and cobalt vapor on the graphite surface to form nickel, iron, manganese and cobalt The coating layer method and equipment, the composite material of graphite and nickel, iron, manganese and cobalt catalyst are used to press synthetic rod to synthesize diamond. Background technique [0002] Static high-pressure synthetic diamond must rely on the catalysis of transition metals or alloys to achiev...

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Problems solved by technology

[0003] The above-mentioned powder catalyst process is based on the mixing of metal powder and graphite powder. Due to the large difference in density between metal powder and graphite, segregation is easy to occur during mixing, and the distribution of metal powder in graphite powder is discontinuous. It is difficult to form a continuous metal film in the environment of the synthesis cavity or the appearance of a single graphite particle, which affects the growth of diamond crystals

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