2024-12-19
Customized High quality, glass tube used to patio gas heater
1. Materials is borosilicate glass, Belongs to hard glass
2. Transmittance: Thickness 3 mm glass tube can reach 92%
3. Can bear 600°C temp.
Temp. difference can reach 250°C,
After semi-tempered technology, Temp. difference can reach 350°C
Physical Properties:
| Coefficient of expansion (20°C–30°C) | 3.3 X 10-6 K-1 |
| Density | 2.23g/cm3 |
| Refractive index | (Sodium D line) 1.474 |
| Dielectric constant (1MHz, 20°C) | 4.6 |
| Specific heat (20°C) | 750J/kg°C |
| coefficient of heat conductivity(20°C) | 1.14 W/m°C |
| Visible light transmittance, 3 mm thick glass | 92% |
| Strain temperature | 520°C |
| Annealing temperature | 560°C |
| Softening point at which Borosilicate may deform | 820°C |
| Temp. difference | 250°C |
| Water resistance(ISO 719) | 1级 |
| Acid resistance(ISO 195) | 1级 |
| Alkali Resistance(ISO 695) | 2级 |
Chemical Composition
| SiO2 | 80% |
| B2O3 | 13% |
| NA2O+K20 | 4.3% |
| Al2O3 | 2.4% |
