Bubble Alumina for Refractory Coating
Bubble Alumina’s structure consists primarily of closed air-filled thin-walled cells which combine to give it exceptional hot strength, high creep resistance, low-density, and low thermal conductivity. This makes Bubble Alumina an effective high-temperature thermal insulator in structural applications where insulating capabilities cannot be sacrificed, and appropriate for use at temperatures as high as 1825°C. It is pre-fired, contains no organics, and exhibits high microwave and RF transparency. Its high alumina content makes it compatible with many extreme chemical environments. Bubble Alumina is manufactured on a custom basis and can be supplied in many sizes.
Data for bubble alumina:
Chemical index for bubble alumina | |||||||||
size | Al2O3 | Fe2O3 | SiO2 | Na2O | MgO | K2O | Cao | ||
0.2-5mm | ≥99% | ≤0.15% | ≤0.3% | ≤0.5% | ≤0.1% | ≤0.1% | ≤0.1% | ||
Physical index for bubble alumina | |||||||||
Bulk density | refractoriness | Shape | |||||||
0.5-1g/cm3 | 1800 degree centigrade | White hollow ball | |||||||
Bulk density for different sizes(g/cm3)
| Item | 5-4mm | 4-3mm | 3-2mm | 2-1mm | 1-0.5mm | 3-0.2mm | 0.5-0.2mm |
| g/cm3 | 0.45 | 0.55 | 0.65 | 0.75 | 0.85 | 0.85 | 0.95 |
bubble alumina:
Hayden (verified owner) –
Very fast delivery.