AF-P Series
Polishing Alumina
Calcined alumina grades engineered for precision polishing — from heavy stock removal to mirror finishing
AF-P polishing aluminas are calcined alumina powders with precisely controlled alpha-Al₂O₃ content, primary crystal size, and particle size distribution. Each grade is designed for a specific stage of the polishing process: stock removal (cut) followed by smoothing (buffing/lapping). During polishing, alumina agglomerates break down into primary crystals that deliver consistent cutting action, then continue as fine smoothing agents. The balance of cut and polish is tuned by calcination degree, primary crystal size, and agglomerate strength.
Key Features
- ✓ Controlled alpha-Al₂O₃ content for tuned cut/polish balance
- ✓ Well-defined top cut and stable particle size distribution
- ✓ Grades from D50 3 μm (mirror finish) to 65 μm (heavy stock removal)
- ✓ Consistent batch-to-batch quality, contamination-free
Technical Specifications
| Grade | D50 | Top cut | BET | Alpha-Al₂O₃ | Primary crystal | Oil absorption | Na₂O | Cut / Polish |
|---|---|---|---|---|---|---|---|---|
| AF-P-1 Ultra-Finishing | 3.5 μm | 20 μm | 12 m²/g | ~70% | <0.4 μm | 38 ml/100g | 0.35% | 1 / 9 |
| AF-P-2 Standard Polishing | 4 μm | 32 μm | 0.9 m²/g | >97% | 2.5 μm | 22 ml/100g | 0.35% | 5 / 4 |
| AF-P-3 Medium Cut | 15 μm | 90 μm | 1.2 m²/g | >97% | 1.5 μm | 34 ml/100g | 0.04% | 3 / 7 |
| AF-P-4 Heavy Cut (Pre-Polish) | 65 μm | 200 μm | 0.4 m²/g | >97% | 3.2 μm | 50 ml/100g | 0.25% | 8.5 / 2 |
Cut and polish values are on a 1–10 relative scale. Higher cut = faster stock removal. Higher polish = finer surface finish. Contact us for detailed application-specific recommendations.
Applications
Packaging
- • 25 kg paper sacks on 1000 kg pallets
- • 500 kg or 1000 kg big bags
- • Plastic drums available for fine grades on request
Need a grade recommendation?
Tell us your workpiece material, current polishing process, and target surface finish. We'll recommend the right grade and compound formulation.
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