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.Precision Borosilicate Glass Tubes for Telecommunications
Density | 2.203 g/cm3 |
Hardness | 7 (Modified Scale); 5.36.5 (Mohs Scale) |
Modulus of elasticity | 63·103N·mm-2 |
| Poisson's ratio | 0.18 |
Tensile strength | 48.3 MPa |
Compressive strength | >1.1 GPa |
Bulk modulus | ~37 GPa |
| Rigidity modulus | 31 GPa |
Poisson's ratio | 0.16 |
Coefficient of thermal expansion | 5.5×10-7 cm/(cmK) ( from 20°C to 320°C) |
Thermal conductivity | 1.3 W/(mK) |
Softening point | 1730°C |
Annealing point | 1180°C |
Strain point | 1075°C |
Electrical resistivity | >1018 Ωm |
Dielectric constant | 3.75 at 20°C 1 MHz |
