Boron carbide traits
A hard black shiny crystals. Lower hardness than diamond industry, but higher than that of silicon carbide. Compared with most of the pottery, fragile low. Having a large thermal neutron capture cross section. Strongchemical resistance. From hot hydrogen fluoride and nitric acid erosion. Dissolved in molten alkali, insoluble in water and acid. The relative density (d204) 2.508 ~ 2.512. Melting point 2350 ℃. Boiling point of 3500 ℃.