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Elmet Technologies

Boron Nitride, Cubic BN, (Borazone)
Categories: Ceramic; Nitride

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Physical PropertiesMetricEnglishComments
Density 3.49 g/cc0.126 lb/in³
a Lattice Constant 3.615 Å3.615 Å
 
Mechanical PropertiesMetricEnglishComments
Knoop Microhardness 210 - 390210 - 390hot pressed; (100 g load) kg/mm²
Hardness, Mohs 1010
Tensile Strength, Ultimate 41.0 - 55.0 MPa5950 - 7980 psihot pressed, parallel to processing direction
Modulus of Elasticity 41.0 - 97.0 GPa5950 - 14100 ksihot pressed, parallel to processing direction
 41.0 - 103 GPa5950 - 14900 ksihot pressed, perpendicular to pressing direction
Compressive Strength 52.0 - 290 MPa7540 - 42100 psihot pressed, perpendicular to pressing direction
 41.0 - 317 MPa5950 - 46000 psihot pressed, parallel to processing direction
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity  >= 3.00e+12 ohm-cm
@Temperature 150 °C
>= 3.00e+12 ohm-cm
@Temperature 302 °F
 2.00e+14 ohm-cm
@Temperature 23.0 °C
2.00e+14 ohm-cm
@Temperature 73.4 °F
Dielectric Constant 4.08
@Frequency 1e+6 Hz
4.08
@Frequency 1e+6 Hz
Dielectric Strength 374 kV/mm9500 kV/in
Dissipation Factor 0.00034
@Frequency 1e+6 Hz
0.00034
@Frequency 1e+6 Hz
Band Gap 4.6 eV4.6 eV
 
Thermal PropertiesMetricEnglishComments
CTE, linear 4.80 µm/m-°C
@Temperature 21.0 - 500 °C
2.67 µin/in-°F
@Temperature 69.8 - 932 °F
Specific Heat Capacity 0.793 J/g-°C0.190 BTU/lb-°F
Thermal Conductivity 20.0 W/m-K139 BTU-in/hr-ft²-°F
Melting Point 3027 °C5481 °FApproximate
Maximum Service Temperature, Air 985 °C1810 °F
 1300 °C2370 °FOxidation limit
Maximum Service Temperature, Inert 2000 °C3630 °F
Heat of Formation 815 kJ/mol815 kJ/mol
Debye Temperature 1627 °C2961 °FApproximate
 
Descriptive Properties
Crystal StructureCubicSphalerite Structure - Space Group F(-4)3m

References for this datasheet.

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