| Fused Silica |
| Mechanical | Units of Measure | SI/Metric | (Imperial) |
| Density | gm/cc (lb/ft3) | 2.2 | -137.4 |
| Porosity | % (%) | 0 | 0 |
| Color | — | clear | — |
| Flexural Strength | MPa (lb/in2x103) | — | — |
| Elastic Modulus | GPa (lb/in2x106) | 73 | -10.6 |
| Shear Modulus | GPa (lb/in2x106) | 31 | -4.5 |
| Bulk Modulus | GPa (lb/in2x106) | 41 | -6 |
| Poisson’s Ratio | — | 0.17 | -0.17 |
| Compressive Strength | MPa (lb/in2x103) | 1108 | -160.7 |
| Hardness | Kg/mm2 | 600 | — |
| Fracture Toughness KIC | MPa•m1/2 | — | — |
| Maximum Use Temperature (no load) | °C (°F) | 1100 | -2000 |
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| Thermal |
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| Thermal Conductivity | W/m•°K (BTU•in/ft2•hr•°F) | 1.38 | -9.6 |
| Coefficient of Thermal Expansion | 10–6/°C (10–6/°F) | 0.55 | -0.31 |
| Specific Heat | J/Kg•°K (Btu/lb•°F) | 740 | -0.18 |
| Electrical |
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| Dielectric Strength | ac-kv/mm (volts/mil) | 30 | -750 |
| Dielectric Constant | @ 1 MHz | 3.82 | -3.82 |
| Dissipation Factor | @ 1 MHz | 0.00002 | -0.00002 |
| Loss Tangent | @ 1 MHz | — | — |
| Volume Resistivity | ohm•cm | >1010 | —
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