Borosilicate Glass vs. PAI
Borosilicate glass and PAI belong to fundamentally different material chemistries. Borosilicate glass is a ceramic material, while PAI is polymeric. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 15 material properties with values for both materials. Properties with values for just one material (23, in this case) are not shown.
For each property being compared, the top bar is borosilicate glass and the bottom bar is PAI.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 2000 | |
| 260 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 67 to 80 | |
| 4.0 to 8.3 |
| Flexural Strength, MPa | 34 to 69 | |
| 160 to 320 |
| Tensile Strength: Ultimate (UTS), MPa | 280 | |
| 100 to 180 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 360 | |
| 260 |
| Specific Heat Capacity, J/kg-K | 830 | |
| 910 to 1000 |
| Thermal Conductivity, W/m-K | 1.2 | |
| 0.26 to 0.53 |
| Thermal Expansion, µm/m-K | 3.3 to 5.1 | |
| 15 to 34 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.2 to 2.6 | |
| 1.4 to 1.6 |
Common Calculations
| Stiffness to Weight: Axial, points | 15 to 17 | |
| 1.6 to 3.2 |
| Stiffness to Weight: Bending, points | 55 to 61 | |
| 38 to 47 |
| Strength to Weight: Axial, points | 30 to 35 | |
| 19 to 34 |
| Strength to Weight: Bending, points | 36 to 43 | |
| 33 to 49 |
| Thermal Diffusivity, mm2/s | 0.54 to 0.63 | |
| 0.16 to 0.41 |
| Thermal Shock Resistance, points | 50 to 91 | |
| 48 to 110 |