Al2O3 balls includes 0--5mm,
Alumina balls characteristics,
High purity,
High echanical strength,
Low thermal conductivity.
Property Indicator | Alumina hollow ball |
Refractoriness °C | 1800 |
Al2O3 % ≥ | 99 |
Fe2O3 % | 0.15 |
Volume Density (g/cm3) | 1.4---1.7 |
Compressive Strength (Mpa) ≥ | 19 |
Linear changing after burnt ≤ | ±0.3 (1600°C*8h) |
Thermal expansivity ≤ | 8.6 (1300°C) |
Coefficient of heat conductivity (300°C±25°C) | 1.0 |
Index
| Alumina hollow ball |
QY---99 | |
Al2O3 % ≥ | 99 |
SiO2 % ≤ | 0.2 |
Fe2O3 % ≤ | 0.15 |
Long-term use temperature °C | 1800 |
Stacking density (g/cm3) | 0.5—1.0 |
Grain size (mm) | 0.2--5 |
The main crystalline phase | a-- Al2O3 |