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Hexagonal Boron Nitride vs. Aluminum Nitride

Both hexagonal boron nitride and aluminum nitride are non-oxide engineering ceramics. There are 17 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is hexagonal boron nitride and the bottom bar is aluminum nitride.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 21 to 250
2100
Elastic (Young's, Tensile) Modulus, GPa 14 to 60
330
Flexural Strength, MPa 18 to 140
190 to 400
Poisson's Ratio 0.11
0.21 to 0.31

Thermal Properties

Maximum Temperature: Mechanical, °C 1030 to 2350
1380
Specific Heat Capacity, J/kg-K 840 to 1610
780
Thermal Conductivity, W/m-K 29 to 96
80 to 190
Thermal Expansion, µm/m-K 0.54 to 18
4.2 to 5.4

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 4.0 to 4.4
6.9 to 28
Dielectric Strength (Breakdown Potential), kV/mm 61 to 200
15 to 56
Electrical Dissipation At 1 Hz 0.0017
0.0019
Electrical Dissipation At 1 MHz 0.00075 to 0.0018
0.00020 to 0.0010
Electrical Resistivity Order of Magnitude, 10x Ω-m 13 to 15
10 to 12

Otherwise Unclassified Properties

Density, g/cm3 1.9 to 2.1
2.9 to 3.3

Common Calculations

Stiffness to Weight: Axial, points 4.1 to 18
55 to 63
Stiffness to Weight: Bending, points 42 to 69
69 to 80
Thermal Diffusivity, mm2/s 9.9 to 34
31 to 74