Calcined Alumina Polishing: Precision Surface Finishing for Metals, Ceramics & Glass | Banlan Chem
Date: 2025-05-15 Categories: News、Alumina、Aluminium Hydroxide Views: 48
What is Calcined Alumina Polishing?
Calcined alumina polishing refers to the use of thermally treated aluminum oxide (Al₂O₃) powder for surface finishing applications. It offers exceptional hardness, thermal stability, and chemical purity—making it ideal for polishing hard substrates such as ceramics, metals, glass, and semiconductor components.
Why Choose Calcined Alumina for Polishing?
- High Mohs Hardness (9+): Enables effective material removal
- Controlled Particle Size: Ensures uniform polishing
- Excellent Thermal Resistance: Handles high-speed polishing
- Chemical Inertness: Ideal for cleanroom-level polishing
Typical Applications
- Metal polishing (e.g., stainless steel, titanium)
- Ceramic finishing (e.g., alumina substrates)
- Optics (glass, lenses)
- Semiconductors & HDDs
Technical Specifications from Banlan Chem
| Parameter | Specification Range |
|---|---|
| Purity (Al₂O₃) | ≥ 99.5% |
| Particle Size (D50) | 0.3 µm – 5 µm |
| Surface Area (BET) | 3 – 6 m²/g |
| Moisture Content | < 0.1% |
| Bulk Density | 0.8 – 1.2 g/cm³ |
Calcined vs. Fused Alumina
| Feature | Calcined Alumina | Fused Alumina |
|---|---|---|
| Structure | Porous, fine-grain | Dense, crystalline |
| Polishing Action | Gentle, uniform | More aggressive |
| Heat Generation | Lower | Higher |
| Surface Finish | Smoother | Rougher |
FAQs About Calcined Alumina Polishing
Q: Can it be used for automated polishing lines?
A: Yes, it is suitable for rotary and vibratory systems.
Q: Does it leave residue?
A: No, it produces a clean finish with minimal cleanup.
Q: What’s the ideal storage method?
A: Store in a sealed, moisture-proof container at room temperature.
Why Banlan Chem?
- Strict quality control and fast lead times
- Custom particle sizes and surface treatments
- Technical support from materials engineers
Request a Sample or Quote
If you're looking for a consistent polishing solution, Banlan Chem is your trusted partner. Contact us today to request samples, get datasheets, or consult with our experts.
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