China T5, T8 Coating Glass Tube for LED Lamp, Find details about China Soda Lime Glass Tube, Glass Tube from T5, T8 Coating Glass Tube for LED Lamp
No. | glass tube (Composition) | Tolerance | ||
1 | Density | g/cm3 | 2.48g/cm3 | |
2 | Coefficient of expansion (20ºC~300ºC) | 10-7K-1 | 91.5×10-7 | +/-1.5 |
3 | Softening point | ºC | 690 oC | +/-15 |
4 | SiO2 | Wt.% | 71.5 | +/-1.0 |
5 | Al2O3 | Wt.% | 2.80 | +/-0.3 |
6 | Na2O | Wt.% | 15.20 | +/-0.5 |
7 | K2O | Wt.% | 1.2 | +/-0.2 |
8 | B2O3 | Wt.% | 1 | +/-0.2 |
9 | MgO | Wt.% | 2.8 | +/-0.4 |
10 | BaO | Wt.% | ≤0.5 | |
11 | CaO | Wt.% | 5.0 | +/-0.5 |
12 | Fe2O3 | Wt.% | ≤0.25 | |
13 | LiO | Wt.% | ≤0.3 | |
14 | Others | Wt.% |