| Property | Value |
|---|---|
| SIO₂ | 99.9% |
| Density | 2.2 (g/cm³) |
| Degree of hardness moh' scale | 6.6 |
| Melting point | 1732℃ |
| Working temperature | 1100℃ |
| Max temperature can reach in a short time | 1450℃ |
| Visible light transmittance | Above 93% |
| UV spectral region transmittance | 80% |
| Annealing point | 1180℃ |
| Softening point | 1630℃ |
| Strain point | 1100℃ |
| Type | JGS1(ZS-1) | JGS2(ZS-2) | JGS3(HS) |
|---|---|---|---|
| Spectral characteristics | 180-2500nm | 200-2500nm | 260-3500nm |
| The average transmittance | 90% | 85% | 85% |
| Bubble class | 0 | 2 | 2 |
| Birefringence | 1-2 | 1-2 | 1-2 |
| Grain structure | 1 | 2 | 2 |
| Fringe | 1-2 | 2 | 2 |
| Uniformity | 1-2 | 2 | 2 |
| Fluorescence | 1 | 2 | 2 |
| Radiation Performance | Does not change color | Sight discoloration | Change color |