Low melting point UV filtering quartz tubes for automotive lamps
Mainly used in automobile, motorcycle headlight and other small power lamp casing; It can also be applied to other transition materials for sealing.
Product Feature：
It is a doped transparent quartz tube that is approximately 150°C cooler than conventional quartz glass materials, and its extreme dimensional tolerance control provides superior processability for high-speed, fast-machining lines, as well as low hydroxyl, UV-C filtering properties.
Typical Size:（mm）
| O.D. Fange | O.D. Tolerance | Thickness | WT Tolerance | Out of Round | Siding | Bow |
|---|---|---|---|---|---|---|
| 8<OD≦14.2 | ±0.10 | 1.0∼1.20 | ±0.15 | 1.5% | 0.08 | 0.15% |
Mechanical & Thermal Properties：
| Density（20°C kg/m3） | Thermal Expansion (200 ~300°C C-1) | Softening Point (°C ) | Annealing Poing (°C ) | Strain Point (°C ) |
|---|---|---|---|---|
| 2.2*103 | 6.3*10-7 | 1535 | 1020 | 965 |
Impurity Value: (ppm)
| Impurity | Na | K | Mg | Li | Ca | Fe | Al | Ti | Cu |
|---|---|---|---|---|---|---|---|---|---|
| typical value | 7 | 5 | 0.5 | 1 | 3 | 1.5 | 25 | 2 | 0.5 |
OH Content: (ppm)
| Typical Value without Baking | After baking |
|---|---|
| 70 | <10 |
Optical Properties:
