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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.
