I. Application
Outer tube for automotive lamps and other U V-resistant quartz materials
II. Product Features
Cerium-doped quartz glass absorbs all UV-B and C, and its softening point is about 50℃ lower than that of conventional tr ansparent quartz glass. Low OH, extreme appearance, and dimensional toleranc es can meet quartz materials that used in high-end UV protection.
III. Product Type
WQPQ323,High Deep cut off UV block Quartz tube
IV. Typical Size
| OD Range | ODTolerance | WallThickness | WTTolerance | Out ofRound | Siding | Bow |
| 3＜Ф≤10 | ±0.1 | 1～2.0 | ±15% | 2% | 12% | 0.15% |
| 10＜Ф≤20 | ±0.2 | 1～2.5 | ±15% | 1.25% | 12% | 0.15% |
| 20＜Ф≤30 | ±0.25 | 1.5～3.0 | ±15% | 1.25% | 12% | 0.15% |
V. Physical and Chemical Properties
i. Mechanical and Thermal Properties
| Density（20℃kg/m3） | ThermalExpansion | SofteningPoint（℃） | AnnealingPoint | Strain Point（℃） |
| （200-300℃℃-1） | （℃） | |||
| 2.1*103 | 5.8*10-7 | 1620 | 1160 | 1060 |
ii. Impurity Value
| Impurity | Na | K | Mg | Li | Ca | Fe | Al | Ti | Cu |
| Typicalvalue | 1.1 | 1.2 | 0.5 | 0.9 | 1.0 | 0.5 | 16.2 | 1.5 | 0.05 |
iii. OH Content
| Typical Value without Baking | After baking |
| 130 | ＜2 |
iv. Optical Properties
