For many people, it may not be known that high-purity graphite has very good wear resistance and self-lubricating property, which is because the graphite crystal forms a very thin graphite crystal film on the surface, which makes the friction coefficient reduce. However, in the actual process, the friction performance of the material is related to the sliding speed. With the increase of sliding speed, the temperature of friction surface will increase, the friction material will change irreversibly, and the wear resistance will decrease. However, graphite materials have good thermal conductivity, which helps to quickly transfer heat from the friction surface. Therefore, the impact of sliding speed on friction coefficient and wear is very small, which does not reduce its wear resistance. The self-lubricating effect of high-purity graphite comes from its own structure. Because the binding force between the graphite layer and the layer is relatively weak, it is easy to slide. In the air with a temperature of 300-400, the oxidation of graphite will increase the friction coefficient. Even when the temperature reaches 300-1000 ℃, it can maintain good wear resistance.
High purity graphite has been widely concerned because of its excellent properties. It is an ideal inorganic non-metallic material. It is widely used in production. High purity graphite has thin flake, good toughness, complete scale crystal, excellent and stable performance. It can be divided into natural high-purity graphite and synthetic high-purity graphite. Nano scale carbon powder with high thermal conductivity is synthetic high-purity graphite, compared with natural high-purity graphite Graphite, with smaller particle size and higher purity, has the characteristics of lubrication, high temperature resistance and corrosion resistance. Its thickness is within the scope of nanoscale, but its radial width can reach several or dozens of microns, with a large shape ratio, and with the original plane carbon ring conjugate crystal structure of graphite, with conductivity, thermal conductivity, mechanical strength, etc Excellent performance. High purity graphite is widely used in many fields. It can be used in advanced refractories, military, coating, light industry, chemical fertilizer industry catalyst additives, etc. it can also be used in deep processing of high purity graphite. It can also be used in a variety of high-tech products such as graphite sealing materials, composite materials, graphite milk, graphite antifriction additives, etc. it is also used in important non-metallic industrial sectors Mineral raw materials. High purity graphite has become the first choice in production by virtue of its excellent properties.
