Hexagonal Boron Nitride -White solid material -Purity quotient:99.5% -High thermal conductivit 1.Hexagonal Boron is a white solid material in the as produced hot pressed form. It is a low porosity solid. It is easily machined into complex shapes using standard carbide tooling. The material is anisotropic in its electrical and mechanical properties due to the platy hexagonal crystals and their ...