White Hexagonal Boron Nitride Powder--BN Powder BN White powder BN Purity quotient:99.5% BN High quality ISO9001:2008 White Hexagonal Boron Nitride Powder is a white solid material in ... 7) Oxidizing additive for refractory materials Boron Nitride ,Boron Nitride,BN,BN,BN,Hexagonal Boron Nitride,Hexagonal Boron Nitride,Hexagonal Boron NitrideCategory/IndexItem/UnitHigh purity born nitrideDensityg/ ...