Characteristics of high purity flake graphite

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

For the analysis of trace impurities in high-purity flake graphite, the sample is usually pre 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 need to dissolve ash with ultra-pure acids, so as to avoid the risk of introducing elements to be measured, so it is used more. The detection of high-purity flake graphite ash is also very difficult, because the enriched ash needs to be burned at high temperature, and it is difficult to separate the ash from the sample boat at high temperature, which makes it impossible to accurately determine the composition and content of impurities.

The existing methods take advantage of the characteristic that the platinum crucible does not react with acid, burn the high-purity flake graphite in the platinum crucible to enrich the ash, and then heat the sample directly with acid in the crucible to dissolve the sample. By measuring the composition in the solution, the impurity content in the flake graphite can be calculated. However, this method has certain limitations, because high-purity flake graphite contains a large amount of carbon, which can make the platinum crucible brittle and fragile at high temperature, which is easy to cause the rupture of the platinum crucible, and the detection cost is very high, which is difficult to be widely used. Because the conventional method can not detect the impurity components of high-purity flake graphite, the detection method needs to be improved.

Although the price of large flake graphite is higher than the general fine flake graphite, the performance of large flake graphite is superior, becoming the choice of more and more enterprises, the factory will also work harder to make more good quality large flake graphite.