A kind of production process of high temperature resistant ablation graphite nanopowder

Abstract

The invention relates to the technical field of graphite, and concretely relates to a production process of graphite nanometer powder with high temperature ablation resistance. The process comprises the following steps: flake graphite powder and hydrogen peroxide are mixed at 0-15 DEG C and acidizing is carried out, a composite phosphoric acid intercalation agent is used for carrying out an intercalation reaction at 30 DEG C or above, wherein the composite phosphoric acid intercalation agent is complex liquid of phosphoric acid and magnesium oxide; cleaning and drying are carried out, heatingand expansion are carried out at 600 DEG C or above; and finally, crushing is carried out in order to obtain graphite nanometer powder. Because of existence of the phosphoric acid composite material,heat resistance of the nanometer powder is improved.

Description

technical field [0001] The invention relates to the technical field of graphite, in particular to a production process of high-temperature-resistant ablation graphite nanopowder. Background technique [0002] Graphite is an important non-metallic mineral, widely distributed in my country. It has unique physical and chemical properties such as high temperature resistance, oxidation resistance, thermal shock resistance, corrosion resistance, high strength, good toughness, high self-lubricating strength, and strong thermal and electrical conductivity. It is widely used in metallurgy, machinery manufacturing, electronics, batteries, Chemical industry, light industry, military industry, aerospace, national defense and refractory materials and other fields. Among them, micropowder graphite is mainly used in electronics and aviation industries, such as graphite milk and graphite electrodes for picture tubes, oil-based colloidal graphite, lubricating oil additives, batteries and pe...

AI Technical Summary

Problems solved by technology

However, because graphite minerals belong to flake minerals, the higher the fineness of ultrafine grinding, the greater the surface energy of graphite, and the electrostatic adsorption is easy to occur between the flake edges of irregular minerals, and the tendency of mutual agglomeration between fine particles is obviously enhanced. , it is necessary to add surfactant molecules to reduce the surface energy of minerals, so that the adsorption force between particles is weakened, so as to prevent the secondary agglomeration of fine particles

Due to the self-lubricating properties of graphite, the preparation process of fine powder graphite takes a long time and consumes a lot of energy, and it will also cause lattice deformation and a decrease in the degree of graphitization

[0004] Another currently disclosed method for preparing micropowder graphite is to use explosives to mix with prepared expanded graphite powder for detonation, and to use detonation to crack expandable graphite (patent number: CN200410020906.6). This method is used in the preparation of graphite In terms of micropowder, it has the advantages of high efficiency, large output, and no decrease in the degree of graphitization. However, since this method is to detonate high-order GICs, it cannot achieve the purpose of making graphite flakes nanometer.