1. nano boron carbide powder possesses high purity, narrow range particle size distribution, larger specific surface area and so on; 2. the melting point of nano b4c is up to 2350oc, boiling point higher than 3500℃ hardness up to 9.3, flexural strength ≥ 400mpa; 3. b4c nanoparticle does not react with acid and alkali solution. Download boron carbide sds boron carbide description. boron carbide, or b4c, is an extremely hard ceramic material discovered in 1899. boron carbide is smelted from boric acid and powdered carbon in electric furnace under high temperature. depending on hardness of 4950kgf/mm2, it is even harder than diamond and cubic boron nitride. Oct 06, 2006 · feldco international offers high quality boron carbide powder b4c at a very competitive prices. grain size ranges from 5 mesh to 3 micron with boron content up to 80%. high purity/technical grade powder is ready for delivery. High quality boron carbide powder b4c nanoparticle price , find complete details about high quality boron carbide powder b4c nanoparticle price,boron carbide powder,b4c nanoparticle,boron carbide b4c nano powder from other inorganic chemicals supplier or manufacturer-guangzhou hongwu material technology co., ltd.