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Item | value |
Fused silica (SiO2) | > 99.7% |
Cristobalite | < 2% |
Bulk density (g/cm3) | 1.92 1.99 |
Apparent porosity (%) | 6 - 12 |
Service temperature (°C) | Up to 1,200 |
Thermal expansion coefficient (×10-6 /°C)* | ≤ 0.6 |
Thermal conductivity (W/m°C)* | < 0.65 |
Thermal shock resistance (25 1200°C) | Very good |
Bending strength (room temperature) (MPa) | ≥ 25 |
Bending strength (1100°C, 0.5 hour) (MPa) | ≥ 28 |
Compressive strength (room temperature) (MPa) | ≥ 60 |
Tolerance in diameter (mm)* | ± 0.05 |
T.I.R. over full length: (mm)* | < 0.12 |
Surface roughness (μm)* | < 1.6 |