China`s leading manufacturer of carbon-based/ceramic-based composites, carbon fiber/silicon carbide fiber, and high-performance ceramics, HNDL, is mainly engaged in the development of high-purity C powder in SiC single crystals in silicon carbide single crystals, and has mastered the 5N and below C powder is purified to 6N and above. The performance indicators of high-purity carbon powder and high-purity graphite products researched and developed have reached the international leading level. At present, the high-purity carbon powder produced by the company has achieved commercial mass production.