CA vs. Low Expansion Glass-ceramic
CA and low expansion glass-ceramic belong to fundamentally different material chemistries. CA is a polymeric material, while low expansion glass-ceramic is ceramic. 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 (21, in this case) are not shown.
For each property being compared, the top bar is CA and the bottom bar is low expansion glass-ceramic.
Metric UnitsUS Customary Units
Mechanical Properties
| Flexural Strength, MPa | 40 to 55 | |
| 35 |
| Tensile Strength: Ultimate (UTS), MPa | 30 to 37 | |
| 53 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 1500 | |
| 800 |
| Thermal Conductivity, W/m-K | 0.25 | |
| 1.5 |
| Thermal Expansion, µm/m-K | 14 | |
| 1.7 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 3.6 | |
| 5.7 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 16 | |
| 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 | |
| 2.4 |
| Refractive Index | 1.5 | |
| 1.5 |
Common Calculations
| Strength to Weight: Axial, points | 6.4 to 7.9 | |
| 6.1 |
| Strength to Weight: Bending, points | 17 to 19 | |
| 13 |
| Thermal Diffusivity, mm2/s | 0.13 | |
| 0.76 |