Thermal Insulation Boron Nitride Ceramic Products(BN) boron nitride rod,discs Boron Nitride Stick BN products ISO9001:2008 Thermal Insulation Boron Nitride ... by hot pressing hexagonal Boron Nitride powders. The color of BN products is milky, true density is 2.27g/cm , ... corrosion-resistance of acid, alk, molten metal and glass. BN products cannot have chemical reaction with most molten metals, such ...