Alumina Bubble Brick
1. High Crushing Strength;
2. High Crushing Strength;
3. Good Thermal Shock Resistance;
4. Good Thermal Stability;
5. Lightweight and Energy-saving
6. Lower Thermal Conductivity;
Technical Data
| Item/Grade | 85 | 90 | 99 |
|---|---|---|---|
| Max Service Temperature, ℃ | 1680 | 1700 | 1800 |
| Al2O3, % | ≥85 | ≥90 | ≥99 |
| SiO2, % | ≤13 | ≤8 | ≤0.2 |
| Fe2O3, % | ≤0.2 | ||
| Bulk Density, g/cm³ | 1.4-1.7 | ||
| Cold Crushing Strength, MPa | ≥12 | ≥10 | ≥9 |
| Reheating Linear Change, % (1600℃*3h) | ±0.3 | ||
| Thermal Expansion Coefficient (Room temp-1300℃) | ~7.8 | ~8.0 | ~8.6 |
| Thermal Conductivity Coefficient (1800℃), W/(m·K) | ≤0.8 | ≤1.3 | ≤1.5 |
Applications of Alumina Bubble Brick
Commonly used as the working layer and heat insulation layer of high temperature kilns in petrochemical industry gasifiers, carbon black reactors, metallurgical induction furnaces and other industries.