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Bubble Alumina is produced by atomizing melted high-purity alumina. The atomized particles form hollow spheres. Bubble Alumina, by nature of its structure, has very low thermal conductivity and low bulk density. While Bubble Alumina exhibits a bulk density twice that of a premium-grade alumina fiber insulator. Bubble Alumina’s structure consists primarily of closed air-filled thin-walled cells that combine to give it exceptional hot strength 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.
Sizes:
| Sizing | Bulk Density | Sizing | Bulk Density |
| 0-0.2mm | 1000-1450 | 0-3mm | 650-950 |
| 0-0.5mm | 800-1100 | 0-5mm | 600-900 |
| 0.5-1mm | 650-850 | 1-2mm | 550-800 |
| 0-1mm | 700-1050 | 1-3mm | 550-800 |
| 1-1.5mm | 550-800 | 2-3mm | 500-750 |
| 0-2mm | 650-1000 | 2-5mm | 500-750 |
| 1.5-2mm | 550-800 | 3-5mm | 450-700 |
Chemical Composition:
| Chemical Composition (wt%) | |||||
| Al2O3 | SiO2 | MgO | Na2O | Fe2O3 | CaO |
| 98.8 | 0.8 | 0.05 | 0.1 | 0.03 | 0.3 |
Properties:
-High Hardness
-Abrasion / Wear-Resistance
-Chemical Inertness
-Superior Insulating Properties
-Resistance to Thermal Shock
-Dielectric Properties
-High Melting Point
-Filtration
-High-Porosity Application
-Coatings
Our Bubble Alumina is carefully handled during storage and transportation to preserve the quality of our product in its original condition.
