Preparation method of micro nano graphite nodule

Abstract

The invention belongs to the field of the inorganic non-metallic material, and relates to a preparation method of micro-nano graphite spheres, which adopts natural flake graphite as a source of elemental carbon, and comprises the following steps: heating the nickel in a high-frequency induction melting furnace to be 1500-1900 DEG C, and placing a graphite flake into the molten nickel; pouring Ni-C alloy into a copper mold and cooling after 15 minutes; placing the Ni-C alloy into a glass tube for remelting, rapidly cooling the Ni-C alloy with a single-roller chilling device, and throwing the Ni-C alloy into a thin strip type object; and corroding the Ni-C alloy with hot concentrated hydrochloric acid in a clean small beaker, and drying obtained products for 30-50 minutes at the temperature of 60-80 DEG C, thereby obtaining black micro-nano graphite spheres. The invention has the advantages of simple process, low cost and high production efficiency. The prepared micro-nano graphite spheres have good stability, the particle sizes are 100nm to 1 mum, and 97 percent of the graphite particles are of a perfect spherical shape.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic materials, and relates to a preparation method of micro-nano graphite spheres. Background technique [0002] Since the discovery of fullerene in 1985, various new carbon materials such as carbon nanotubes, carbon nanotrees, carbon microrods, carbon spheres, etc. have received extensive attention and research. Among them, graphite ball has excellent thermal conductivity, corrosion resistance, thermal stability and lubricity, etc. Therefore, it can be used as a catalyst, special rubber additive, conductive, wear-resistant, corrosion-resistant materials, etc. in an industry. For example, in the metallurgical industry, graphite is mainly used to make crucibles for smelting metals, precious metals and rare metals; in the atomic energy and national defense industries, it is one of the important structural materials for building nuclear reactors, and it is used as shielding...

AI Technical Summary

Problems solved by technology

Most of these methods use chemical methods to prepare micro-nano carbon spheres, and some methods require relatively harsh reaction conditions, such as high temperature and high pressure; some methods require expensive equipment and complicated operations, and the cost is relatively high and the output is low; some methods Such as the nano-casting method, the shape and size of the prepared graphite balls are not easy to control, etc.