AF-C Series
Calcined Alumina
High-temperature calcined aluminum oxide with controlled alpha-phase content
AF-C calcined aluminas are produced by high-temperature calcination of high-purity aluminum hydroxide. The controlled calcination process determines the alpha-Al₂O₃ content, primary crystallite size, and morphology. Subsequent grinding and air-separation produce powders with narrow particle size distribution and consistent batch-to-batch quality.
Key Features
- ✓ Alpha-Al₂O₃ ≥ 92% for stable high-temperature performance
- ✓ Controlled particle size from 2 μm to 80 μm
- ✓ Low water demand and good flow properties
- ✓ ISO 9001 certified production
Technical Specifications
| Grade | Al₂O₃ | Na₂O (total) | Fe₂O₃ | SiO₂ | D50 | BET | Alpha phase | Bulk density |
|---|---|---|---|---|---|---|---|---|
| AF-C-1 Standard Calcined | ≥ 99.3% | ≤ 0.30% | ≤ 0.03% | ≤ 0.05% | 40–80 μm | 0.5–1.5 m²/g | ≥ 92% | 0.80–1.00 g/cm³ |
| AF-C-2 Fine Calcined | ≥ 99.3% | ≤ 0.30% | ≤ 0.03% | ≤ 0.05% | 15–40 μm | 1.0–3.0 m²/g | ≥ 92% | 0.70–0.90 g/cm³ |
| AF-C-3 Ground & Air-Separated | ≥ 99.5% | ≤ 0.20% | ≤ 0.03% | ≤ 0.04% | 2–5 μm | 2.0–5.0 m²/g | ≥ 95% | 0.55–0.75 g/cm³ |
Applications
→ Shaped and unshaped refractories
→ Kiln furniture and foundry products
→ Technical ceramics and wear-resistant ceramics
→ Ceramic membranes and catalyst supports
→ Glazes, frits, and porcelain bodies
Packaging
- • 25 kg paper sacks on 1000 kg pallets
- • 500 kg or 1000 kg big bags
- • Bulk tanker delivery available for large-volume orders
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