Grade A Lava vs. PES
Grade A lava and PES belong to fundamentally different material chemistries. Grade A lava is a ceramic material, while PES 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 (22, in this case) are not shown.
For each property being compared, the top bar is grade A lava and the bottom bar is PES.
Metric UnitsUS Customary Units
Mechanical Properties
| Flexural Strength, MPa | 28 to 69 | |
| 130 |
| Tensile Strength: Ultimate (UTS), MPa | 6.9 to 21 | |
| 87 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 650 to 1130 | |
| 200 |
| Specific Heat Capacity, J/kg-K | 840 | |
| 1100 |
| Thermal Conductivity, W/m-K | 2.0 | |
| 0.18 |
| Thermal Expansion, µm/m-K | 2.5 to 3.3 | |
| 53 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 5.3 to 5.8 | |
| 3.5 |
| Dielectric Strength (Breakdown Potential), kV/mm | 3.2 to 3.9 | |
| 16 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.3 to 2.5 | |
| 1.4 |
Common Calculations
| Strength to Weight: Axial, points | 0.77 to 2.5 | |
| 18 |
| Strength to Weight: Bending, points | 3.2 to 7.3 | |
| 32 |
| Thermal Diffusivity, mm2/s | 1.0 | |
| 0.12 |