Hexagonal boron nitride is a boron nitride phase that exists in nature, belonging to the hexagonal crystal system. It appears white and has a layered structure and lattice parameters similar to graphene, hence it is also known as white graphene. It has excellent comprehensive characteristics such as high temperature resistance, thermal shock resistance, high temperature thermal stability, corrosion resistance, and easy cutting processing, and has broad application prospects in metallurgy, chemical industry, electronics, and new energy fields.