Product Description
| Physical properties | |
| SiO2 : | 0.999 |
| Density : | 2.2(g/cm3) |
| Degree of hardness moh' scale : | 6.6 |
| Cofficient of expansion 25--300℃ ℃-1 ( ×10-6 ) | 0.58 |
| Melting point: | 1732°C |
| Working temperature : | Under 1100°C |
| Max temperature can reach in a short time : | 1450°C |
| Acid tolerance: | 30 times than Ceramics , 150 times than Stainless steel |
| Visible light transmittance : | above 93% |
| UV spectral region transmittance: | 0.8 |
| Resistance value : | 10000 times than ordinary glass |
| Annealing point: | 1180°C |
| softening point: | 1630°C |
| Strain point: | 1100°C |
| Dimension Tolerance(mm) | |||||
| Designation | OD | WT | Max. Siding | Max.Ovality | Max.Bow |
| 1-3mm | ±0.05 | ±0.05 | 0.05 | 0.05 | 1‰ |
| 3-10mm | ±0.1 | ±0.1 | 0.1 | 0.15 | 2‰ |
| 10-20mm | ±0.2 | ±0.1 | 0.1 | 0.2 | 2‰ |
| 20-30 | ±0.2 | ±0.15 | 0.15 | 0.2 | 2‰ |
| 30-40 | ±0.4 | ±0.15 | 0.2 | 0.2 | 2‰ |
| 40-50 | ±0.5 | ±0.2 | 0.25 | 0.25 | 2‰ |
| 50-65 | ±0.6 | ±0.2 | 0.35 | 0.25 | 2.5‰ |
| 65-85 | ±0.8 | ±0.3 | 0.45 | 0.3 | 2.5‰ |
| 85-100 | ±1 | ±0.3 | 0.5 | 0.5 | 2.5‰ |
| 100-150 | ±1.5 | ±0.4 | 0.5 | 0.8 | 3‰ |
| 150-200 | ±2 | ±0.6 | 0.6 | 1 | 4‰ |
| 200-300 | ±3 | ±0.8 | 0.7 | 2 | 5‰ |
| Spectral Transmission at 1.0mm Thickness | ||||||||
| nm | 220 | 255 | 280 | 315 | 350 | 380 | 590 | 780 |
| % | 89 | 91 | 93 | 93 | 93 | 93 | 93.2 | 93.4 |
| Chemical Composition, unit:PPM | ||||||||
| K+Na | Ca | Fe | Al | Mg | Ti | Ba | Li | Cu |
| <10 | <3 | <1.5 | <20 | <1.0 | <3.0 | <0.2 | <1.0 | <0.5 |
Packaging & Shipping
Packing method:
Each product with a bubble bag, and put into carton box, and then packed in wooden case, the quantity of product in each wooden case is decided by product size.