99.5% alumina (Al₂O₃) ceramic balls are premium-grade grinding media and industrial filler materials known for their exceptional hardness, wear resistance, and chemical stability. With near-purity composition, these advanced ceramic balls outperform standard alumina products in demanding applications across industries like mining, electronics, and pharmaceuticals.
Key Properties of 99.5% Al₂O₃ Ceramic Balls
1.Superior Hardness
Mohs Hardness: 9 (equivalent to natural corundum/sapphire).
Vickers Hardness: 1,800–2,000 HV, ideal for grinding ultra-hard materials (e.g., silicon carbide, tungsten carbide).
2.Unmatched Wear Resistance
Abrasion loss: ≤0.05%/100 hours (vs. 0.1–0.5% for 95% Al₂O₃).
Lifespan 2–3× longer than lower-purity alumina balls.
3.Chemical Inertness
Resists acids/alkalis (pH 1–14), ensuring zero contamination in food/pharma applications.
Na₂O content <0.05%, preventing material degradation.
4.Thermal Stability
Withstands temperatures up to 1,750°C, suitable for high-heat processes.
Manufacturing Excellence
Raw Materials: High-purity α-Al₂O₃ powder (D50 <1µm).
Sintering: HIP (Hot Isostatic Pressing) at 1,600°C for zero porosity.
Quality Control: Laser-scanned sphericity (>95%), ISO 9001 certified.
Why Choose 99.5% Over 95% Al₂O₃?
50% lower wear rate in abrasive environments.
30% higher grinding efficiency due to denser structure.
Critical for precision applications (e.g., LED/LCD glass substrates).
Technical Specifications
Al₂O₃ Content: ≥99.5%
Apparent Particle Density: ≥3.63 g/cm³
Hardness, Mohs: 9
Available Sizes: 3mm–50mm
Conclusion
99.5% Al₂O₃ ceramic balls represent the pinnacle of grinding media technology, delivering unmatched durability and performance for mission-critical industrial processes. Whether for ultrafine powder production or harsh chemical environments, their near-theoretical purity ensures long-term cost savings and consistent quality.
Request a quote or free samples today to test in your application!
Contact:
Email: info@xintaokeji.com
Website: www.xintaokeji.com