Novel catalytic agent for diamond synthesis and preparation method thereof

Abstract

The invention discloses a novel catalytic agent for diamond synthesis and a preparation method thereof. The novel catalytic agent comprises the following components in percentage by weight: 15-25% of aluminum, 2-3% of rhenium, 2-4% of chromium, less than or equal to 0.02% of carbon, less than or equal to 0.001% of boron, less than or equal to 0.003% of silicon and the balance of Fe. According to the novel catalytic agent disclosed by the invention, the formula design is reasonable, the cost performance of the catalytic agent is improved, the molding granularity and crystal color purity of diamond are improved, and the novel catalytic agent has excellent self-sharpening ability and high thermal stability.

Description

technical field [0001] The invention relates to the technical field of diamond production, in particular to a novel catalyst for diamond synthesis and a preparation method thereof. Background technique [0002] Diamond is the crystal material with the highest hardness among the known natural materials in the world. It has a wide range of uses in the industrial field. Because of its crystal clear structure and dazzling reflective color, it is also worn and treasured as high-end jewelry by the world. , due to the limited reserves of natural diamonds, it is more precious. Through people's continuous experimentation and research, the production process of synthetic diamond has been developed, and it has been put into industrial production and large-scale application of synthetic diamond. The production of artificial diamond needs to be carried out under very high pressure and temperature. In order to quickly incubate and crystallize graphite materials into diamond crystal struc...

AI Technical Summary

Problems solved by technology

The production of artificial diamond needs to be carried out under very high pressure and temperature. In order to quickly incubate and crystallize graphite materials into diamond crystal structures, people have explored and invented various catalyst materials. The catalyst materials are mainly NiFeCo, NiMnCo, 4J36 series materials, etc. A large amount of precious metal materials need to be added to the ingredients of these materials. The production process cost is high, the production process is complicated, and the yield is low. In the case of impure materials, the diamond growth process will be slow, and the resulting crystal color will be contaminated. Diamond forms polycrystalline structure during growth