Borosilicate glass (PYREX Glass International called) physical and chemical properties:
Silicon content | >80% |
---|---|
Strain and Temperature | 520℃ |
Annealing temperature | 560℃ |
Softening temperature | 820℃ |
Index of refraction | 1.47 |
Transmittance | ≧90% |
Elastic modulus E | 67KNmm-2 |
Tensile strength | 40-120Nmm-2 |
Processing temperature(104dpas) | 1220℃ |
Coefficient of thermal expansion(20-300℃) | 3.3×10-6/K-1 |
Poisson's ratio μ | 0.2 |
Density(20℃) | 2.23g/cm3 |
Specific heat | 0.9Jg-1K-1 |
Thermal conductivity | 1.2Wm-1K-1 |
Water resistance(ISO 719) | 1 Level |
Acid resistance(ISO 195) | 1 Level |
Alkali resistance(ISO 695) | 2 Level |
CML resistant glass rod glass rod Φ6 × 30mm | 300℃ |
Borosilicate glass (PYREX internationally known glass) spectra: