Calcined Alumina
Product Overview: Calcined Alumina
Calcined Alumina is produced through controlled thermal processing to achieve high purity, extreme hardness, and superior thermal stability. It is specifically suited to demanding ceramic, surface-finishing, and wear-resistant applications across modern industrial formulations.
Its fine particle structure and excellent abrasion resistance support densification, mechanical strength, and controlled finishing performance, making it suitable for advanced technical ceramic, refractory, and industrial polishing systems.
Key Benefits
High Hardness
Provides strong wear resistance across demanding components and formulations.
High Thermal Stability
Maintains performance and structural integrity at elevated operating temperatures.
High Purity
High alumina purity supporting demanding technical ceramics and electrical insulation systems.
Fine Particle Structure
Enables controlled processing, uniform dispersion, and efficient particle packing.
Good Mechanical Strength
Supports structural performance, flexural strength, and resistance to physical shock.
Excellent Wear Resistance
Improves overall durability and operational lifespan in high-friction environments.
Applications
Ceramics
Brake Composites & Friction
Refractories & High-Temp Castables
Abrasives & Precision Polishing
Electrical Insulation
Other Industrial Applications
Technical Specifications
| Parameter | Refractory Premium | Ceramic Low Soda | Glass Polishing | Abrasive Grade | Glaze Grade |
|---|---|---|---|---|---|
| Al2O3 Content | ≥ 99.5% | ≥ 99.6% | ≥ 99.2% | ≥ 99.0% | ≥ 98.5% |
| Na2O Content | ≤ 0.35% | ≤ 0.10% | ≤ 0.40% | ≤ 0.45% | ≤ 0.55% |
| Fe2O3 Content | ≤ 0.02% | ≤ 0.015% | ≤ 0.03% | ≤ 0.04% | ≤ 0.05% |
| SiO2 Content | ≤ 0.03% | ≤ 0.02% | ≤ 0.04% | ≤ 0.05% | ≤ 0.08% |
| Alpha Al2O3 Phase | ≥ 95% | ≥ 92% | ≥ 90% | ≥ 93% | ≥ 85% |
| Loss on Ignition (LOI) | ≤ 0.2% | ≤ 0.3% | ≤ 0.4% | ≤ 0.5% | ≤ 0.8% |
| Specific Surface BET | 1.0 - 2.5 m2/g | 0.8 - 1.5 m2/g | 3.0 - 5.0 m2/g | 1.2 - 2.0 m2/g | 2.0 - 4.0 m2/g |
| Median Particle (D50) | 3.5 - 5.0 µm | 2.0 - 3.5 µm | 1.5 - 2.5 µm | 12 - 18 µm | 5.0 - 8.0 µm |
Why Choose Us?
Precision Calcination
Controlled high-temperature processing ensures high alpha-alumina phase conversion and uniform crystalline morphology.
High Chemical Purity
Tested for Al₂O₃ content (≥ 99.5%), ultra-low soda (Na₂O), and trace iron oxide to guarantee peak electrical and thermal performance.
Tailored Particle Distribution
Available in multiple particle cuts from micronized grades for fine polishing up to refractory-grade powders.
Dependable Bulk Supply
Available in 25 kg / 50 kg moisture-barrier bags and 1 MT jumbo bags with rapid dispatch across India.