White Aluminum Oxide Powder for Paint & Coating
White Aluminum oxide powder：
| Item | Typical Value |
|---|---|
| Appearance | White fine powder |
| Al₂O₃ Content | ≥ 99.0% |
| Na₂O | ≤ 0.2% |
| Fe₂O₃ | ≤ 0.05% |
| SiO₂ | ≤ 0.05% |
| True Density | 3.95 – 3.97 g/cm³ |
| Mohs Hardness | 9 |
| Melting Point | ~ 2050 °C |
| pH Value (5% suspension) | 6.5 – 8.0 |
| Volatile Matter | ≤ 0.2% |
| Whiteness | ≥ 85 |
| Particle Size Range | 240# – 10000# |
| Oil Absorption | Low to medium |
Key Advantages & Typical Specifications
White Aluminum Oxide (WA) powder is a high-performance functional filler for industrial coatings, automotive paint, repair paint, topcoat, primer, and high-temperature coatings.
1. Main Advantages
- Extreme hardness (Mohs 9)，Improves scratch resistance, abrasion resistance, and film hardness.
- High whiteness & purity (Al₂O₃ ≥99%)，No discoloration, no yellowing, suitable for clear coats and light-colored paints.
- Low iron & low sodium，Prevents rust spots and high-temperature yellowing during baking.
- Excellent chemical resistance， Resists acid, alkali, solvent, salt spray; improves corrosion resistance & weatherability.
- Good particle packing，Increases coating density, adhesion, and durability.
- Narrow particle size distribution， Easy to disperse, good leveling, stable coating system.
2.Key Functional Properties
- High hardness, improves scratch & abrasion resistance
- High whiteness, no discoloration in clear & light-colored coatings
- Excellent chemical inertness & corrosion resistance
- Good dispersion and coating leveling
- High thermal stability for baking coatings
- Improves film density, adhesion and durability
3. Suitable Coatings
- Automotive OEM & refinish paint
- Industrial anti-corrosion coating
- High-temperature coating
- Wear-resistant floor coating
- Polyurethane & epoxy coatings
- High-performance top clear coat