Fused Silica vs. Glass-bonded Mica
Both fused silica and glass-bonded mica are glass and glass-ceramics. There are 19 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is fused silica and the bottom bar is glass-bonded mica.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 1100 | |
| 270 |
| Elastic (Young's, Tensile) Modulus, GPa | 73 | |
| 71 |
| Flexural Strength, MPa | 67 | |
| 79 |
| Tensile Strength: Ultimate (UTS), MPa | 50 | |
| 39 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 1080 | |
| 450 |
| Specific Heat Capacity, J/kg-K | 720 | |
| 500 |
| Thermal Conductivity, W/m-K | 1.4 | |
| 23 |
| Thermal Expansion, µm/m-K | 0.5 | |
| 6.7 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 3.8 | |
| 6.8 |
| Dielectric Strength (Breakdown Potential), kV/mm | 30 | |
| 20 |
| Electrical Dissipation At 1 MHz | 0.00011 | |
| 0.0016 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 14 | |
| 10 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.2 | |
| 2.6 |
Common Calculations
| Stiffness to Weight: Axial, points | 18 | |
| 15 |
| Stiffness to Weight: Bending, points | 63 | |
| 52 |
| Strength to Weight: Axial, points | 6.3 | |
| 4.1 |
| Strength to Weight: Bending, points | 14 | |
| 9.7 |
| Thermal Diffusivity, mm2/s | 0.85 | |
| 18 |
| Thermal Shock Resistance, points | 97 | |
| 5.9 |