Suzhou Nutpool Materials Technology Co., Ltd

With aMohs hardnessbetween 9 and 10, boroncarbideis one of the hardestsyntheticsubstances known, being exceeded only by cubicboron nitrideanddiamond. As an abrasive, it is used in powdered form in the lapping (fine abrading) of metal and ceramic products, though its low oxidation temperature of 400–500° C (750–930° F) makes it unable to withstand the heat of grinding hardened tool steels. Because of its hardness, together with its very lowdensity, it has found application as a reinforcing agent for aluminum in military armour and high-performance bicycles, and its wear resistance has caused it to be employed in sandblasting nozzles and pump seals. A neutron absorber, boron carbide is used in powdered or solidified form to control the rate of fission in nuclear reactors.

Boron carbide is produced by reducing boron oxide with carbon at high temperatures in anelectric furnace. After grinding, theblack powderis solidified by pressing at temperatures exceeding 2,000° C (3,630° F). Itsmelting pointis approximately 2,350° C (4,260° F).