PTFE vs. Zirconia
PTFE and zirconia belong to fundamentally different material chemistries. PTFE is a polymeric material, while zirconia is ceramic. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 11 material properties with values for both materials. Properties with values for just one material (18, 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 PTFE and the bottom bar is zirconia.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 6.9 to 24 | |
| 1260 to 3080 |
| Flexural Strength, MPa | 13 to 50 | |
| 630 to 970 |
| Tensile Strength: Ultimate (UTS), MPa | 13 to 25 | |
| 410 to 450 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 260 to 270 | |
| 500 to 1330 |
| Thermal Conductivity, W/m-K | 0.24 to 0.65 | |
| 2.2 to 4.3 |
| Thermal Expansion, µm/m-K | 110 to 120 | |
| 8.8 to 9.5 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 2.1 to 2.4 | |
| 28 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 2.0 to 18 | |
| 4.5 to 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.1 to 2.3 | |
| 5.7 to 6.0 |
Common Calculations
| Strength to Weight: Axial, points | 1.7 to 3.2 | |
| 19 to 22 |
| Strength to Weight: Bending, points | 5.7 to 8.7 | |
| 21 to 23 |