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Aluminum Nitride vs. CVD Diamond

Both aluminum nitride and CVD diamond are non-oxide engineering ceramics. There are 13 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is aluminum nitride and the bottom bar is CVD diamond.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 330
1050
Fracture Toughness, MPa-m1/2 2.9
5.5
Poisson's Ratio 0.21 to 0.31
0.1

Thermal Properties

Specific Heat Capacity, J/kg-K 780
500
Thermal Conductivity, W/m-K 80 to 190
1900
Thermal Expansion, µm/m-K 4.2 to 5.4
1.0

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 6.9 to 28
5.7
Electrical Dissipation At 1 MHz 0.00020 to 0.0010
0.00020
Electrical Resistivity Order of Magnitude, 10x Ω-m 10 to 12
13

Otherwise Unclassified Properties

Density, g/cm3 2.9 to 3.3
3.5

Common Calculations

Stiffness to Weight: Axial, points 55 to 63
170
Stiffness to Weight: Bending, points 69 to 80
96
Thermal Diffusivity, mm2/s 31 to 74
1080