Boron Nitride is a very hard material, second only to diamond. It is formed by heating boric oxide with ammonia. The powder obtained is purified to remove metallic residues before commercial use.
Boron Nitride is used in electric insulators and in cutting tools. It also has good chemical resistance. Its resistance to abrasion makes it suitable for use in nozzles which handle slurry and in high pressure water jet cutters.
