Calcined Alumina Oxide Powder
Stable alpha-alumina powder for ceramics and refractories
Calcined alpha alumina powder with high hardness, thermal stability and dielectric performance for advanced ceramics.
Product Overview
Calcined alumina oxide powder (α-Al₂O₃) is produced by calcining alumina hydrate at 1200-1400°C, converting it to the dense, thermodynamically stable alpha phase. It offers exceptional hardness (9 on Mohs scale), high thermal conductivity, electrical insulation and chemical inertness, making it fundamental to advanced ceramics.
Our calcined alumina is available in standard, low-soda and fine-ground grades, with controlled alpha conversion and particle size for applications from spark plug insulators and wear parts to electronic substrates and refractory castables.
Key Features
- Alpha-phase content ≥ 95%
- Mohs hardness 9 for wear applications
- Excellent electrical insulation properties
- Thermal stability to 1800°C+
- Standard, low-soda and fine grades
Technical Specifications
| Al₂O₃ content | ≥ 99% |
|---|---|
| Alpha-phase content | ≥ 95% |
| Na₂O content | ≤ 0.1% (low-soda ≤ 0.05%) |
| Particle size D50 | 1-45 μm (grade dependent) |
| Specific surface area | 0.5-5 m²/g |
Applications
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