| Index | Cordierite mullite composite brick burner | Dome composite brick | Pipe combination brick |
| Al2O3 % | ≥65 | ≥65 | ≥65 |
| Fe2O3 % | ≤1.8 | ≤1.8 | ≤1.9 |
| Refractoriness | ≥1790 | ≥1790 | ≥1790 |
| Apparent Porosity | ≤20 | ≤20 | ≤19 |
|
g/cm3 Bulk density |
≥2.6 | ≥2.5 | ≥2.6 |
|
MPa Cold Crushing Strength |
≥60 | ≥55 | ≥60 |
|
Refractoriness under load (0.2MPa) ℃ |
≥1600 | ≥1500 | ≥1450 |
| linear change rate on reheating（1450℃ x2h） | 0.1～-0.2 | 0.1～-0.2 | 0.1～-0.2 |
