White Ceramic Alumina Grinding Balls Diamonds Ultra Hard Milling Media
Price:
Negotiable
MOQ:
1kg
Delivery Time:
within 15 days
Brand:
Zhongli
Product Description
White Ceramic Alumina Grinding Balls: Ultra-Hard Milling Media
Known as the "White Diamonds of Milling," our ultra-hard alumina grinding media delivers exceptional performance in precision milling applications across multiple industries.
Product Overview
Alumina grinding media consists of spherical balls made from high-purity alumina ceramic (Al₂O₃). With a density of 3.6 g/cm³ and hardness exceeding 80 HRA, these grinding balls offer superior durability and efficiency for material processing.
Key Advantages
- High Hardness: Mohs hardness of 9 ensures effective milling without excessive wear
- Abrasion Resistance: Exceptional durability for long-term use with minimal degradation
- Chemical Inertness: Resists pH 1-14, making it safe for acids/alkalis and pharmaceuticals
- Purity: White color signifies high purity for contamination-sensitive applications
Technical Specifications
Chemical Composition
| Composition | Al₂O₃ | SiO₂ | CaO+MgO | Fe₂O₃ |
|---|---|---|---|---|
| Wt% | ≥92 | 7 max | ≤2 | <0.1 |
Physical Properties
| Specific Gravity (g/cm³) | Bulk Density (kg/L) | Hardness (Moh's) | Water Absorption (%) | Self Wearing Loss (24hrs) | Compression (MPa) |
|---|---|---|---|---|---|
| ≥3.65 | ≥2.2 | 9 | <0.01 | ≤0.012 | ≥2000 |
Available Sizes (mm)
| 0.5-1.0 | 6.0 | 20.0 | 70.0 |
| 1.0 | 8.0 | 25.0 | 80.0 |
| 2.0 | 10.0 | 30.0 | 90.0 |
| 3.0 | 13.0 | 40.0 | 100.0 |
| 4.0 | 15.0 | 50.0 | |
| 5.0 | 18.0 | 60.0 |
Performance Comparison
Mechanical & Physical Properties
| Property | Alumina (92%) | Alumina (99%) | Zirconia | Steel | Silica Sand |
|---|---|---|---|---|---|
| Density (g/cm³) | 3.6 | 3.9 | 6.0 | 7.8 | 2.2 |
| Hardness (Mohs/HV) | 9 (~1,500 HV) | 9 (~1,800 HV) | 8.5 | 6-7 | 7 |
| Wear Rate (g/ton) | 10-50 | 5-20 | 1-5 | 100+ | 300+ |
| Compressive Strength | 2,000 MPa | 2,500 MPa | 2,200 MPa | 500 MPa | Low |
Key Takeaways:
- 99% Alumina offers 30% lower wear than 92% grade
- 2-5x longer lifespan vs. steel in abrasive slurries
- Harder than zirconia but less tough (ideal for fine grinding)
Chemical & Thermal Resistance
| Property | Alumina (99%) | Performance Impact |
|---|---|---|
| Chemical Inertness | Resists pH 1-14 | Safe for acids/alkalis, pharmaceuticals |
| Max Temperature | 1,600°C | Stable in kilns, calcination |
| Thermal Shock | Moderate | Avoid rapid quenching (>200°C/min) |
| Contamination Risk | None | Zero metal ions (critical for Li-ion batteries) |
Industry Applications
| Industry | Benefit of Alumina Balls |
|---|---|
| Mining | 50% lower replacement cost vs. steel in ore grinding |
| Pharma | FDA-compliant, no endotoxin release |
| Batteries | Prevents Fe/Ni contamination in cathode materials |
| Paints | Maintains color purity (no metal leaching) |
Product Sets Available
- 1L Alumina Planetary Mill Jar Set: 12×20mm, 239×10mm, 1145×5mm balls
- 500ml Alumina Planetary Mill Jar Set: 14×15mm, 119×10mm, 573×5mm balls
- Small Size Media Set for 1L Jars: 95×10mm, 3728×4mm, 9163×2.5mm balls
Packaging Information
Standard packaging: 25kg woven bags, 1000-1250kg per pallet with shrink wrap.
Handling & Safety Guidelines
- Store in dry, clean environment to prevent contamination
- Avoid sudden thermal shocks (>200°C/min temperature changes)
- Regularly inspect for wear, cracks, or surface damage
- Not recommended for high-impact applications
- Follow all manufacturer guidelines for optimal performance
Quality Assurance
Global Distribution
Our alumina grinding media has been successfully shipped to clients worldwide, including:
Frequently Asked Questions
What are alumina ceramic balls made of?
They are made from aluminium oxide (Al₂O₃), a high-purity ceramic material known for its hardness and wear resistance.
What are the key properties?
High hardness, excellent wear resistance, chemical stability, high-temperature resistance (up to 1600°C), and electrical insulation.
Why choose alumina over steel or other ceramics?
They offer superior wear resistance, chemical stability, and are lighter than steel, making them ideal for specific applications.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Guangzhou Zoli Technology Co.,Ltd.
Location
Room 702A, No. 585, Airport Road, Tangjing Street, Baiyun District, Guangzhou City, Self-compiled 2341
Contact Person
Ain Qiu