AF-R Series
Reactive Alumina
Ultra-fine, high-surface-area alumina for advanced ceramics and refractories
AF-R reactive aluminas are engineered with high specific surface area (BET) and controlled primary crystallite size. Monomodal and bimodal grades provide optimal particle packing, enabling high green density and low sintering temperature. Doped variants with MgO are available for spinel-forming applications.
Key Features
- ✓ BET from 1.5 to 8 m²/g for controlled reactivity
- ✓ Monomodal and bimodal size distributions available
- ✓ Sintering temperature as low as 1550°C with MgO doping
- ✓ Green density up to 2.70 g/cm³ at 100 MPa
Technical Specifications
* Sintered density measured at 100 MPa with 0.1% MgO, 1750°C. Green density: 2.37–2.40 g/cm³.
| Grade | Al₂O₃ | Na₂O (total) | Fe₂O₃ | SiO₂ | D50 | BET | Alpha phase | Sintered density* |
|---|---|---|---|---|---|---|---|---|
| AF-R-1 Standard Reactive (Monomodal) | ≥ 99.6% | ≤ 0.20% | ≤ 0.03% | ≤ 0.05% | 1.5–2.5 μm | 1.5–3.0 m²/g | ≥ 96% | ≥ 3.86 g/cm³ |
| AF-R-2 Bimodal Reactive | ≥ 99.7% | ≤ 0.10% | ≤ 0.03% | ≤ 0.05% | 1.5–2.0 μm | 3.0–5.0 m²/g | ≥ 96% | ≥ 3.87 g/cm³ |
| AF-R-3 Super-Reactive (Monomodal) | ≥ 99.7% | ≤ 0.10% | ≤ 0.03% | ≤ 0.05% | 0.8–1.0 μm | 5.0–8.0 m²/g | ≥ 95% | ≥ 3.88 g/cm³ |
Applications
→ High-performance technical ceramics
→ Electronic substrates and electro-ceramics
→ Ballistic armor ceramics
→ Refractory castables with low cement content
→ Dental ceramics and bio-ceramics
Packaging
- • 25 kg paper sacks with moisture barrier liner
- • 500 kg or 1000 kg big bags
- • Custom packaging available for high-humidity shipping routes
Request a sample or quotation
Tell us your target sintering temperature and density — we'll recommend the optimal grade.
Contact us →