The so-called carbon materials such as artificial graphite molded products are polycrystalline materials with extremely complex structures, and the basic structure of graphite crystallization has strong anisotropy. Therefore, the macroscopic thermal conductivity of carbon materials, apart from relying on empirical data, is almost unpredictable. The factors that have a significant impact on thermal conductivity include:

(1) The differences in the basic properties of the initial raw materials;

(2) The manufacturing process - macroscopic anisotropy;

(3) Heat treatment temperature - the growth degree of graphite microcrystals;

(4) Apparent density, distribution of holes, etc.