Now we have dark blue, light blue,amber, light yellow, green, pink, purple, red and opaque black colors available.
The regular stocked sizes include 25*4mm, 32*3.2mm, 32*4mm, 38*3.2mm, 38*4mm, 44*4mm, 51*4mm, 51*4.8mm. We could also make your customized sizes.
| Physical Property |
| No. |
Physical performance |
Numerical Value |
Unit |
| 1 |
Coefficient of mean linear thermal expansion(20℃,300℃) |
3.3±0.1 |
10-6K-1 |
| 2 |
Transformation temperature |
525±15 |
℃ |
| 3 |
Softening point |
820±10 |
℃ |
| 4 |
Working point |
1260±20 |
℃ |
| 5 |
Density at 20℃ |
2.23±0.02 |
g/cm3 |
| 6 |
Mean thermal conductivity(20℃-100℃) |
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℃ |
ISO719-HGB 1 |
| Hydrolytic resistance at 121℃ |
ISO720-HGA 1 |
| Acid resistance Class |
ISO1776-First Class |
|
