Product overview
Our α-type microcrystalline alumina features a stable crystal structure and unique performance characteristics, composed of fine-grained, high-purity particles with controllable specific surface area and stable physicochemical properties. It offers excellent resistance to high temperatures, wear, and corrosion, as well as outstanding electrical insulation — serving CED/IGBT ceramic substrates, high-end insulators, 5G microwave devices, lithium battery separator coatings, specialty ceramic bearings, cutting tools, and medical ceramics such as ceramic joint components.
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 |
α-Type microcrystalline alumina specifications
| Grade | CaO (ppm) | SiO₂ (ppm) | Fe₂O₃ (ppm) | Na₂O (ppm) | MgO (ppm) | Calcination temp (°C) | α-phase (%) | Particle size (μm) |
|---|---|---|---|---|---|---|---|---|
| MC-01 | ≤200 | ≤45 | ≤50 | ≤150 | 12 | 1230 | ≥96 | 0.5 |
Note: Specifications can be adjusted to customer requirements.
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.