Physical and chemical properties of boron carbide

　　With acid, alkali solution does not react with high chemical potential, neutron absorption, abrasion resistance and semiconductor conductivity. Acid is one of the most stable substance, all concentrated or dilute acid oralkaline aqueous solutions are stable. Sulfuric acid, hydrofluoric acid mixed acid treatment, calcined in air at 800 ℃ 21h, can be completely decomposed and the formation of carbon trioxide and boron trioxide.

　　When there are a number of transition metals and their carbides coexist with exceptional stability.

　　Boron carbide in 1000 ~ 1100 ℃ under the conditions of the first periodic table Ⅳ, Ⅴ and Ⅵ group transition metal and boron carbide powder to form strong metal boride.

　　In the presence of nitric acid with sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, when melted, readily decomposed and boron carbide to form a solution.

　　Its Mohs hardness of 9.3, and is the second boron nitride, diamond, fullerene compounds, and the whole diamond quill fifth hardest known substance.