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Aluminum Nitride vs. Hexagonal Boron Nitride

Both aluminum nitride and hexagonal boron 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 aluminum nitride and the bottom bar is hexagonal boron nitride.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 2.9 to 3.3
1.9 to 2.1

Common Calculations

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