六硼氮化硼（hBN）粉末

Hex-Boron Nitride (hBN)Powder六硼氮化硼（hBN）粉末六硼氮化硼（hBN）粉末cronsto 30 micronsableidea. .HexagonalBoron Nitride (hBN) is also known as ‘White Graphite’, has similar(hexagonal) crystal structure as of Graphite. This crystalstructure provides excellent lubricating properties. hBN is muchsuperior to Graphite and has following characteristics: PhysicalProperties of HexagonalBoron Nitride CAS Number 10043-11-5 Chemical Formula BN CrystalStructure HexagonalColor White Density (gm/cm3 ) 2.3 Melting Point 3000o C DissociatesCoefficient of Friction (COF) 0.15 to 0.70 DielectricConstant(MHz) 4 Dielectric Breakdown strength 35 KV/mm Youngs Modulus (MPa)20-102 Thermal Expansion Coefficient @ 25o C-1000o C 1 x 10-6/ o C(Parallel to press dir.) 4 x 10-6/ o C (Perpendicular to pressdir.) Thermal Conductivity(at 293 K, directionalaverage) 0.08 cal/ cm.sec.K Temperature Stability 1000o C in Air1400o C in Vacuum 1800o C in Inert atmosphere • ExcellentLubricating Properties due to low Coefficient of Friction at 0.15to 0.70 • Good Chemical Inertness • Electrical Insulator • ThermalConductor(result: better heat dissipation) • High Temperature Stability,1000o C in Air, 1400o C in Vacuum and 1800o C in Inert gas • LowThermal Expansion • Low Dielectric Constant• High Load bearing properties • Non-Wetting: hBN is not wetted byGlasses, Salts and (most) metals,therefore it provides strong resistance to chemical attack • EasyMachineability (in hot pressed state). Complex shapes can bemachined from hot pressed structure.