high purityflake graphiteIt has good high temperature resistance, electrical conductivity, thermal conductivity, lubricity and chemical stability of high purity graphite. Graphite powder manufacturers are widely used in metallurgy, machinery, environmental protection, chemical industry, fire protection, electronics, medicine, military industry, aerospace and other fields. It is becoming more and more important in the national economy and is an indispensable non-metallic raw material for the development of modern industry and high technology. Trace impurities have a great influence on the performance of graphite products. The higher the carbon content of high-purity flake graphite, the better its performance as a functional material.

In order to analyze trace impurities in high-purity flake graphite, the sample is usually ashed or wet digested to remove carbon, the ash is dissolved with acid, and then the impurity content in the solution is determined. The ashing method does not require the use of ultra-pure acid to dissolve the ash, avoiding the risk of introducing the element to be tested, so it is widely used. However, it is very difficult to detect the ash content of high-purity flake graphite, because high-temperature combustion is required to enrich the ash, and the ash will stick to the sample boat at high temperature, which is difficult to separate, resulting in the inability to accurately determine the composition and content of impurities.

The existing methods all use the characteristics of the platinum crucible which does not react with acid. A platinum crucible was used to burn high-purity flake graphite to enrich ash, and then the crucible was directly heated with acid to dissolve the sample. The impurity content in flake graphite can be calculated by measuring the composition in the solution. However, this method has certain limitations, because high-purity flake graphite contains a large amount of carbon, which will make the platinum crucible brittle at high temperature, which will easily lead to the fracture of the platinum crucible, and the detection cost is very high, so it is difficult to be widely used. Because the traditional method can not detect the impurity components in high purity flake graphite, it is necessary to improve the detection method.

Flake graphite is widely used in high-grade refractories and coatings in the metallurgical industry. Such as magnesia carbon brick, crucible, etc. Stabilizer for industrial explosives, desulfurization accelerator for smelting industry, pencil lead for light industry, carbon brush for electrical industry, electrode for battery industry, catalyst for fertilizer industry, etc. After deep processing of graphite flakes, graphite emulsion can be produced, which can be used as lubricant, release agent, wire drawing agent, conductive coating, etc. It can also produce expanded graphite, which is used as a raw material for flexible graphite products, such as flexible graphite seals, flexible graphite composite products, etc.

Flake graphite is used as a functional filler for coatings, mainly for anti-corrosion coatings, fireproof coatings and conductive coatings. As an anti-corrosion material, it is an anti-rust primer made of carbon black, talc and oil, which has good chemical resistance and solvent corrosion resistance. If chemical pigments such as zinc yellow are added to the formula, the anti-rust effect will be better.

The above is some knowledge about flake graphite, I hope you can seriously learn to understand the relevant knowledge.