... ISO9001:2008 Kinds Of Ceramic Boron Nitride Products(BN)Boron Nitride Solids are made by hot pressing hexagonal Boron ... Nitride powders. The color of BN products is milky, true density is 2.27g/cm , Mohs ... high corrosion-resistance of acid, alk, molten metal and glass. BN products cannot have chemical reaction with most molten metals, such ...