PES vs. Silicon Nitride
PES and silicon nitride belong to fundamentally different material chemistries. PES is a polymeric material, while silicon nitride is ceramic. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 13 material properties with values for both materials. Properties with values for just one material (22, in this case) are not shown.
For each property being compared, the top bar is PES and the bottom bar is silicon nitride.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 2.6 | |
140 to 310 |
Flexural Strength, MPa | 130 | |
130 to 810 |
Thermal Properties
Maximum Temperature: Mechanical, °C | 200 | |
1000 to 1330 |
Specific Heat Capacity, J/kg-K | 1100 | |
720 to 800 |
Thermal Conductivity, W/m-K | 0.18 | |
12 to 31 |
Thermal Expansion, µm/m-K | 53 | |
2.5 to 3.2 |
Electrical Properties
Dielectric Constant (Relative Permittivity) At 1 MHz | 3.5 | |
8.0 to 10 |
Dielectric Strength (Breakdown Potential), kV/mm | 16 | |
18 |
Electrical Resistivity Order of Magnitude, 10x Ω-m | 15 | |
11 to 12 |
Otherwise Unclassified Properties
Density, g/cm3 | 1.4 | |
2.2 to 3.4 |
Common Calculations
Stiffness to Weight: Axial, points | 1.1 | |
34 to 53 |
Stiffness to Weight: Bending, points | 33 | |
65 to 78 |
Thermal Diffusivity, mm2/s | 0.12 | |
7.5 to 13 |