Quartz glass has a very low coefficient of thermal expansion, high temperature resistance, excellent chemical stability, excellent electrical insulation, low and stable ultrasonic delay performance, the best UV-Vis spectral performance and visible and near infrared spectroscopy Performance, and has a higher than ordinary glass mechanical properties.
Density | 2.5 g/cm3 |
Hardness | 5.5-6.5 |
Tensile strength | >90 MPa |
Compressive strength | 40-90MPa |
Bulk modulus | ~37 GPa |
Rigidity modulus | 31 GPa |
Poisson's ratio | 0.2 |
Coefficient of thermal expansion | 5.8×10-7 cm/(cmK) |
Thermal conductivity | 6.2 W/(mK) |
Softening point | 500°C |
Annealing point | 350°C |
Strain point | 300°C |
Electrical resistivity | >1018 Ωm |
Dielectric constant | 3.75 at 20°C 1 MHz |