On the basis of the salt water hydrolysis method, the "improved direct hydrolysis method" high-purity alumina preparation technology, namely the high-purity aluminum direct hydrolysis method, was successfully developed through technological innovation. This technology replaces aluminum foil with high-purity and high-activity aluminum powder, and replaces isopropanol with high-purity water. The aluminum powder reacts with pure water at a certain pressure and temperature to form aluminum hydroxide, which is then dried and roasted to obtain high-purity aluminum oxide.
| Product Code | BT-AL-3.0 | |
| Appearance | White Powder | |
| Material | 4NAL2O3 | |
| Phase state | α | |
| Apparent Density | 0.45±0.1g/cm3 | |
| Specific surface area (BET) | 4.5±0.5m2/g | |
| Water content | <1% | |
| Granularity (um) | D50 | 15±5 |
| Analysis of other compliments (PPM) | ||||||||
| Element | Na | Mg | K | Ca | Fe | Cu | Zn | Si |
| Content | <10 | <3 | <3 | <2 | <5 | <3 | <5 | <15 |






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