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: Megasil SA grades improve the heat-conductivity of the rubber compound and if liquid helps flowability.
Functionality: Performance
Performance
