Lead-alkali-silica Glass vs. High-silica Glass
Both lead-alkali-silica glass and high-silica glass are glass and glass-ceramics. There are 11 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is lead-alkali-silica glass and the bottom bar is high-silica glass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 67 | |
| 78 |
| Flexural Strength, MPa | 34 | |
| 34 |
Thermal Properties
| Glass Transition Temperature, °C | 450 | |
| 650 to 800 |
| Thermal Expansion, µm/m-K | 9.0 | |
| 0.6 to 0.75 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 Hz | 7.0 | |
| 3.8 |
| Electrical Dissipation At 1 Hz | 0.0024 | |
| 0.00044 to 0.00087 |
| Electrical Dissipation At 1 MHz | 0.0018 | |
| 0.00044 to 0.00088 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 12 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 3.1 | |
| 2.4 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 | |
| 19 |
| Stiffness to Weight: Bending, points | 43 | |
| 61 |