Low Expansion Glass-ceramic vs. Soda-lime Glass
Both low expansion glass-ceramic and soda-lime glass are glass and glass-ceramics. There are 18 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is low expansion glass-ceramic and the bottom bar is soda-lime glass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 83 | |
| 70 to 71 |
| Knoop Hardness | 530 | |
| 570 |
| Poisson's Ratio | 0.22 | |
| 0.23 |
| Tensile Strength: Ultimate (UTS), MPa | 53 | |
| 41 to 180 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 690 | |
| 300 |
| Specific Heat Capacity, J/kg-K | 800 | |
| 720 to 800 |
| Thermal Conductivity, W/m-K | 1.5 | |
| 1.0 to 1.1 |
| Thermal Expansion, µm/m-K | 1.7 | |
| 8.8 to 9.0 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 5.7 | |
| 7.3 to 7.4 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.4 | |
| 2.4 |
| Light Transmission Range, µm | 0.5 to 2.7 | |
| 0.35 to 2.5 |
| Refractive Index | 1.5 | |
| 1.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 19 | |
| 16 |
| Stiffness to Weight: Bending, points | 59 | |
| 56 |
| Strength to Weight: Axial, points | 6.1 | |
| 4.6 to 20 |
| Strength to Weight: Bending, points | 13 | |
| 11 to 28 |
| Thermal Diffusivity, mm2/s | 0.76 | |
| 0.51 to 0.6 |
| Thermal Shock Resistance, points | 28 | |
| 4.7 to 20 |