Activated alumina powder is also called ρ-alumina powder because of its ρ-type crystal form. It is a form of alumina transition phase, and its main crystal phase is ρ-alumina-based. ρ-alumina is made of aluminum hydroxide by suspended roasting, rapid dehydration, and rapid cooling. Generally, the specific surface area is above 200㎡/g, so it has strong activity and water absorption performance, and has certain hydration activity.
Uses:
1. It can replace pure calcium aluminate cement as a binder for unshaped refractory castables, and can also replace silicon micropowder and ultrafine alumina powder for adhesives and binders of ## corundum products.
2. It can be used as an adsorbent and water absorbent, and can be formed and fired into activated alumina balls/strips, which are widely used in petroleum, chemical, pharmaceutical, health and other industries.
Parameter：
| Item | Indicators |
| Crystalline phase | ρ-Al2o3 |
| Specifications um | 10-12 |
| Appearance | white powder |
| Specific surface area ㎡/g | 250-300 |
| Pore cm3/g | 0.20-0.25 |
| Loss on burning %≤ | 10 |
| Static adsorption capacity %≥ | 12 |
| Package moisture content %≤ | 1 |
| AL2O3 | 92% |
| SiO2 | 0.02% |
| Fe2O3 | 0.02% |
| Na2O | 0.3-0.4% |
