King's Fused Silica roller has low dilatability and does not transfer heat; 20-30% heat absorbed by glass is transferred by the gap between the rollers.
As an important role in the process of glass heating, ceramic roller is positioned between the glass and the bottom furnace.
| Bulk density | g/cm3 | 1.92-1.99 |
|---|---|---|
| Apparent porosity | % | 6-12 |
| Compressive strength(RT) | MPa | ≥60 |
| Bending strength(RT) | MPa | ≥25 |
| Bending strength(HT) | (1100℃×0.5h)(MPa) | ≥28 |
| Thermal Expansion | (RT-1100℃) ×10-6/℃ | ≤0.6 |
| Thermal Conductivity(500℃) | W/m·℃ | 0.65 |
| Roughness | μm | Ra≤1.6 |
| Diameter tolerance | mm | ±0.05 |
| T.I.R | mm | ≤0.08 |
| Chemical composition | SiO2 (wt%) | ≥99.5 |