Alkali-lime-silica Glass vs. High-silica Glass
Both alkali-lime-silica glass and high-silica glass are glass and glass-ceramics.
For each property being compared, the top bar is alkali-lime-silica glass and the bottom bar is high-silica glass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 78 | |
| 78 |
| Flexural Strength, MPa | 34 to 170 | |
| 34 |
Thermal Properties
| Glass Transition Temperature, °C | 530 | |
| 650 to 800 |
| Thermal Expansion, µm/m-K | 9.0 | |
| 0.6 to 0.75 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 Hz | 7.1 to 7.5 | |
| 3.8 |
| Dielectric Strength (Breakdown Potential), kV/mm | 28 | |
| 34 |
| Electrical Dissipation At 1 Hz | 0.022 to 0.052 | |
| 0.00044 to 0.00087 |
| Electrical Dissipation At 1 MHz | 0.0088 to 0.053 | |
| 0.00044 to 0.00088 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 10 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.7 | |
| 2.4 |
Common Calculations
| Stiffness to Weight: Axial, points | 16 | |
| 19 |
| Stiffness to Weight: Bending, points | 53 | |
| 61 |