| Customization: | Available |
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| Color: | Transparent |
| Certification: | ISO9001, RoHS |
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| Physical Property | |||||||||
| No. | Physical performance | Numerical Value | Unit | ||||||
| 1 | Coefficient of mean linear thermal expansion(20°C,300°C) | 3.3±0.1 | 10-6K-1 | ||||||
| 2 | Transformation temperature | 525±15 | °C | ||||||
| 3 | Softening point | 820±10 | °C | ||||||
| 4 | Working point | 1260±20 | °C | ||||||
| 5 | Density at 20°C | 2.23±0.02 | g/cm3 | ||||||
| 6 | Mean thermal conductivity(20°C-100°C) | 1.2 | w/m2k | ||||||
| 7 | Refractive index | 0.92 | 1 | ||||||
| Main Composition | |||||||||
| SiO2 | B2O3 | Na2O+K2O | Al2O3 | ||||||
| 81 | 13 | 4 | 2 | ||||||
| Chemical Property | |||||||||
| Hydrolytic resistance at 98°C | ISO719-HGB 1 | ||||||||
| Hydrolytic resistance at 121°C | ISO720-HGA 1 | ||||||||
| Acid resistance Class | ISO1776-First Class | ||||||||
| Optical Property | |||||||||
| Refractive: | nd : 1.47384 | ||||||||
| Light transmission: | 92%thickness≤4mm,91%thickness≥5mm | ||||||||
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