Product overview
Microcrystalline alumina is a fine-grained alumina powder with excellent hardness, wear resistance, and thermal stability. Its distinctive crystal structure delivers outstanding performance in ceramics and refractories, especially where high strength and durability are required.
Technical specifications
Physical properties
| Appearance | White powder |
| Crystal phase | α-Al₂O₃ |
| Grain size | 0.5-3 μm |
| Bulk density | 0.8-1.2 g/cm³ |
| True density | 3.9-4.0 g/cm³ |
Chemical composition
| Al₂O₃ content | ≥99.5% |
| Na₂O content | ≤0.1% |
| SiO₂ content | ≤0.05% |
| Fe₂O₃ content | ≤0.03% |
| TiO₂ content | ≤0.01% |
Performance characteristics
| Mohs hardness | 9 | Refractoriness | ≥1850°C |
| Thermal conductivity | 30-35 W/(m·K) | Compressive strength | ≥2000 MPa |
Applications
Microcrystalline alumina is essential in high-performance applications that demand superior hardness and thermal stability.
Technical ceramics
Used to produce high-performance ceramic components for aerospace, automotive, and electronics.
Refractories
A key component in refractory linings and high-temperature industrial processes.
Abrasives
Abrasive media for grinding wheels, polishing compounds, and surface finishing.
Wear-resistant coatings
Wear protection and surface treatment for industrial equipment and parts.
Packaging & storage
📦 Packaging options
- 25 kg paper bags with PE liner
- 1000 kg bulk bags
- Custom packaging available on request
🌡️ Storage conditions
- Store in a dry environment
- Avoid moisture
- Shelf life: 36 months
Ready to order?
Contact our sales team for quotes, availability, and custom specifications.