Properties
| Items | Data |
| SiO2 Content | ≥ 99.5 % |
| Bulk Density | 1.9 ~ 1.99 g/cm3 |
| Apparent Porosity | 7 ~ 13 % |
| Compressive Strength (at room temperature) | ≥ 60 MPa |
| Flexural Strength (at room temperature) | ≥ 25 MPa |
| Flexural Strength (at 1100℃ for 30mins.) | ≥ 28 MPa |
| Coefficient of Thermal Expansion (RT ~ 1000℃) | ≤ 0.6 x 10-6/℃ |
| Thermal Conductivity (at 500℃) | 0.66 W/m℃ |
| Cristobalite | ≤ 2 % |
| Surface Roughness | ≤ 2.0 µm |
| Diameter Accuracy | ± 0.05 mm |
