For atomic energy industry and defense industry: Graphite powder has a good neutron moderator, used in nuclear reactors. The uranium and graphite powder reactor is one of the most widely used atomic reactors. As a deceleration material for power in nuclear power reactors, it should have a high melting point, stability and corrosion resistance. Graphite powder can fully meet the above requirements. The graphite powder used in the atomic reactor is very pure, and the impurity content does not exceed several tens of PPM. In particular, the boron content should be less than 0.5 PPM. In the defense industry, graphite powder is also used to make nozzles for solid-fuel rockets, nose cones for missiles, parts for space navigation equipment, thermal insulation and radiation-resistant materials.
Graphite powder has excellent chemical stability. The specially processed graphite powder has the characteristics of corrosion resistance, good thermal conductivity and low permeability. Widely used in the manufacture of heat exchangers, reaction tanks, condensers, combustion towers, absorption towers, coolers, heaters, filters, etc. pump equipment. It is widely used in petrochemical, hydrometallurgy, acid and alkali production, synthetic fiber, papermaking and other industrial sectors, which can save a lot of metal materials.
Graphite powder can be used as casting, sand turning, molding, high-temperature metallurgical materials: due to the small thermal expansion coefficient of graphite powder, it can withstand rapid changes, so it can be used as a mold for glassware. After using graphite powder, ferrous metals can obtain accurate casting size and smooth surface high utilization rate, can be used without machining or a little machining, thus saving a lot of metal. In the production of powder metallurgy processes such as cemented carbide, graphite powder materials are usually used to make ceramic boats for stamping and sintering. Crystal growth crucibles, regional refining vessels, fixtures, induction heaters, etc. of single crystal silicon are all processed with high-purity graphite powder.
In addition, graphite powder is also a polishing agent and rust inhibitor for glass and paper in light industry. It is an indispensable raw material for the manufacture of pencils, inks, black pigments, inks, artificial diamonds and diamonds. It is a perfect energy-saving and environmentally friendly material and has been used as a car battery in the United States. With the development of modern technology and industry, the application field of graphite powder is still expanding. It has become an indispensable raw material for new composite materials in the high-tech field and plays a vital role in the national economy.