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Aluminum Nitride vs. PEEK

Aluminum nitride and PEEK belong to fundamentally different material chemistries. Aluminum nitride is a ceramic material, while PEEK is polymeric. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 12 material properties with values for both materials. Properties with values for just one material (25, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

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

Aluminum Nitride (AlN)Polyetheretherketone (PEEK)
Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 2100
120 to 300
Elastic (Young's, Tensile) Modulus, GPa 330
4.0 to 24
Flexural Strength, MPa 190 to 400
150 to 330

Thermal Properties

Maximum Temperature: Mechanical, °C 1380
330
Specific Heat Capacity, J/kg-K 780
1390 to 1700
Thermal Conductivity, W/m-K 80 to 190
0.25 to 0.93
Thermal Expansion, µm/m-K 4.2 to 5.4
15 to 52

Electrical Properties

Electrical Resistivity Order of Magnitude, 10x Ω-m 10 to 12
3.0 to 14

Otherwise Unclassified Properties

Density, g/cm3 2.9 to 3.3
1.3 to 1.5

Common Calculations

Stiffness to Weight: Axial, points 55 to 63
1.5 to 10
Stiffness to Weight: Bending, points 69 to 80
36 to 73
Thermal Diffusivity, mm2/s 31 to 74
0.1 to 0.51