Zirconia of Tundish nozzle core
Zirconia of Tundish nozzle core
The zirconium core has the characteristics of high refractoriness, good thermal shock resistance, corrosion resistance, erosion resistance, small diameter expansion and long service life.
Lower-consumption on refractory material.
Simple-structure, light on weight.
Reliable on working performance.
Improve the working efficiency.
Use temperature up to 2400 ℃
High density
Low thermal conductivity (20% than of alumina)
Chemical inertness
Resistance to molten metals
Ionic electrical conduction
Wear resistance
High fracture toughness
High hardness
| ZrO2+HfO2 % | ≥ | 93 | 94 | 95 |
| Bulk Density (g/cm3) | ≥ | 5 | 5.2 | 5.4 |
| Apparent Porosity % | ≤ | 8 | 7 | 6 |
| Cold Crushing Strength (Mpa) | ≥ | 90 | 100 | 100 |
| Refractoriness under Load 0.2Mpa (℃) | ≥ | 1790 | 1790 | 1790 |
