HEXAGONAL BORON NITRIDE HBN is a kind of white powder of loose, lubricious and easy moisture absorption with theoretical density 2.27g/cm3, Moh抯 hardness 2, low mechanical strength , but high than graphite. It has fine insulation, thermal conductivity, chemical corrosion resisting property, anti-oxygenation property and lubricating property. It has strong neutron absorbent power. Because of its stable chemical property, it is not reactive to almost every melting metals. It can bear high temperature of 2000℃, thus has the fine property of mechanical process. The parameter of Hexagonal Boron Nitride Index name The parameter Chemistry structural formula BN Molecular weight 24.82 Color White Crystal structure Hexagonal Density (g/cm3) 2.27 Resistivity (Ω.cm) 1016~1018 Thermal conductivity W/(m.k) 1.5 Dielectric constant 3~5 Breakdown strength (kv/mm) 30~40 Mohs hardness 2 Thermal expansion coefficient 7.5 ?0-6