High purity graphite. High purity isotropic graphite products is usually used for hot pressing dies. This graphite material has high temperature stability, high strength, low expansion coefficient and excellent thermal conductivity, and is suitable for manufacturing high-precision and high-quality molds. In the hot pressing process, the graphite mold can withstand the high temperature and high pressure environment, provide uniform pressure distribution, and will not react chemically with the processed material, thus ensuring the molding quality of the product.