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Hexagonal Boron Nitride (hBN) Powder Lower (六角氮化硼(hBN)粉低)
Hexagonal Boron Nitride (hBN) Powder
Hexagonal Boron Nitride (hBN) is also known as ‘White Graphite’, has similar (hexagonal) crystal
structure as of Graphite. This crystal structure provides excellent lubricating properties. hBN is much
superior to Graphite and has following characteristics:
Physical Properties of Hexagonal Boron Nitride
CAS Number 10043-11-5
Chemical Formula BN
Crystal Structure Hexagonal
Color White
3
Density (gm/cm ) 2.3
o
Melting Point 3000 C Dissociates
Coefficient of Friction (COF) 0.15 to 0.70
Dielectric Constant (MHz) 4
Dielectric Breakdown 35 KV/mm
strength
Youngs Modulus (MPa) 20-102
-6 o
Thermal Expansion 1 x 10 / C (Parallel to press dir.)
-6 o
Coefficient 4 x 10 / C (Perpendicular to press
o o dir.)
@ 25 C-1000 C
Thermal Conductivity 0.08 cal/ cm.sec.K
(at 293 K, directional average)
o
Temperature Stability
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