Explanation
The chemical formula is BN, belonging to the equiaxed crystal system. The crystal is a hexahedron octahedron polymer, octahedron, etc. It is dark brown fine-grained crystal, sometimes gray and light yellow crystal. It is an artificial super hard materials. Not yet discovered in nature. It is usually made from hexagonal boron nitride as raw material, with alkali metal, alkaline earth metal and its nitride as catalyst (under static ultra-high pressure and high temperature conditions above 5GPa and lOO0 ℃), or by explosion without catalyst. The hardness of cubic boron nitride is slightly lower than that of diamond. Its thermal stability and chemical inertness to iron and its alloy are better than diamond. It is especially suitable for processing hard to machine materials such as high hardness quenching steel and stainless steel. It is used to make abrasive tools, multi crystal cubic boron nitride turning tools, milling tools and drills.
Classification
Inorganic non-metallic materials -> Crystal growth and crystal materials