Material: Borosilicate Glass(PYREX Glass)
| Silicon content | >80% |
| Strain and Temperature | 520℃ |
| Annealing temperature | 800℃ |
| Index of refraction | 1.47 |
| Transmittance | ≧90％ |
| Elastic modulus E | 67KNmm-2 |
| Tensile strength | 40-120Nmm-2 |
| Processing temperature(104dpas) | 1220℃ |
| Coefficient thermal expansion | (20-300℃) (3.3±0.1)×10-6/K -1 |
| Poisson's ratio μ | 0.2 |
| Density（20℃） | 2.23g/cm3 |
| Specific heat | 0.9Jg-1K-1 |
| Thermal conductivity | (20-100℃）1.2Wm-1K-1 |
| Water resistance | 1 Level |
| Acid resistance | 1 Level |
| Alkali resistance | 2 Level |
