White Boron Nitride Gasket---BN gasket BN Crucible Gasket BN crucible of aluminum BN Gasket ISO9001:2008 Nitride Crucible GasketBoron 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 value is 2, they have a high melting point(sublimate point is 3000°C). When in a condition of inert atmosphere, their maximum ...