Spherical Alumina
Mineral: Spherical Alumina
Spherical alumina is basically alumina “shaped” in a high temperature fusion process. Spherical alumina therefore has the same intrinsic properties as any other alumina. Its chemical formula is Al2O3.
At Sibelco high purity aluminas are being used to make spherical alumina.
Basic properties
| Property | Value | Unit |
| Moisture | 0.1 | [%] |
| Hardness (Mohs) | 9.0 | [-] |
| Al2O3 | 99.9 | [%] |
| Density | 4 | [kg/ dm3] |
| Thermal conductivity | 36 | (Wm−1K−1) |
Products:
| Name | Grade | D50 |
| Megasil SA | 0020 | 2.3 |
| 0050 | 5.7 | |
| 0080 | 9.3 | |
| 0380 | 46 | |
| 0700 | 72 |
Production Location: Yeonmu (KR)
Application: Spherical Alumina improves the heat-conductivity of the compound and for liquid rubber compounds helps the flowability.
Functionality: Performance
Performance
