Premium Calcined Alumina for Fine Ceramics
High-performance calcined alumina featuring high alpha phase content (>95%), low sodium (<0.08%), and controlled particle size for die pressing, isostatic pressing and other ceramic forming processes.
High-Purity Calcined Alumina for Demanding Fine Ceramic Applications
Our premium calcined alumina is engineered for manufacturers of high-performance technical ceramics. Produced in a tunnel kiln under strict thermal controls, it delivers a consistent and reliable foundation for components where purity, microstructure, and sintering performance are critical.
Core Product Advantages
- High Alpha Phase Content (>95%): Ensures optimal sintering behavior and final ceramic density, leading to superior mechanical and thermal properties.
- Low Alkali Content (Na₂O ≤ 0.08%): Minimizes the risk of glass phase formation and grain growth anomalies during firing, resulting in a more predictable and stable microstructure.
- Exceptional Chemical Purity (Al₂O₃ ≥ 99.7%): Reduces impurities that can compromise the performance, color, and electrical insulation of the final ceramic product.
- Precisely Controlled Particle Size: Multiple grades available with tightly controlled particle and crystal sizes, allowing for tailored powder packing and shrinkage management.
Technical Data Sheet: Calcined Alumina Grades
The following table outlines key specifications for our standard grades. Custom formulations are available upon request.
| Grade |
Al₂O₃ (%) ≥ |
SiO₂ (%) ≤ |
Fe₂O₃ (%) ≤ |
Na₂O (%) ≤ |
α-phase (%) ≥ |
Average Particle Size (µm) |
Primary Crystal Size (µm) |
| ALC-11 |
99.7 |
0.04 |
0.02 |
0.03 |
95 |
- |
3.0 - 7.0 |
| ALC-12 |
99.7 |
0.05 |
0.04 |
0.05 |
95 |
- |
1.0 - 3.0 |
| ALC-11G |
99.7 |
0.10 |
0.03 |
0.05 |
95 |
4.0 - 6.0 |
- |
| ALC-12G |
99.7 |
0.10 |
0.04 |
0.05 |
95 |
3.0 - 4.0 |
- |
| ALC-13G |
99.7 |
0.15 |
0.04 |
0.08 |
95 |
2.0 - 3.0 |
- |
| ALC-21G |
99.7 |
0.10 |
0.04 |
0.05 |
95 |
2.5 - 3.5 |
- |
Applications in Advanced Ceramics
Our calcined alumina is the material of choice for a wide range of technical ceramic forming processes and end-products:
Forming Processes
- Dry Pressing & Isostatic Pressing: Excellent flowability and compaction for high-density green bodies.
- Hot Pressure Casting: Suitable for complex shapes and high-volume production.
End-Use Components
- Structural Ceramics: High-wear components, liners, and nozzles
- Ceramic Seals: Mechanical face seals requiring high hardness and corrosion resistance
- Electronic Substrates & Insulators: Where high purity ensures excellent electrical properties
- High-Quality Alumina Grinding Media & Balls: Used as raw material for granulation in premium alumina grinding bodies
Your Partner for High-Performance Ceramic Materials
We understand that your ceramic products are only as good as the raw materials you use. By providing consistently high-purity calcined alumina with tailored physical properties, we empower you to manufacture more reliable, higher-performing ceramic components.
Interested in seeing how our alumina can improve your product? Contact our technical team today to discuss your specific requirements and request product samples or a technical datasheet.
