Aluminum Oxide
High-Quality Aluminum Oxide for Industrial Applications
Aluminum Oxide (Al₂O₃) is one of the most versatile ceramic materials used across various industries. With exceptional hardness, thermal stability, and chemical resistance, our premium Aluminum Oxide delivers superior performance in demanding applications.
Key Specifications
- Purity: 99.5% - 99.9% Al₂O₃
- Density: 3.95 g/cm³
- Mohs Hardness: 9 (second only to diamond)
- Melting Point: 2072°C (3762°F)
- Thermal Conductivity: 30 W/mK
- Dielectric Strength: 15 kV/mm
Standard Product Grades
| Grade | Purity | Average Particle Size | Primary Applications |
|---|---|---|---|
| Standard | 99.5% | 10-50 μm | Abrasives, Refractories |
| High Purity | 99.9% | 1-10 μm | Electronics, Technical Ceramics |
| Nano Grade | 99.9% | 30-50 nm | Specialty Coatings, Composites |
Aluminum Oxide FAQ
What are the main industrial uses of Aluminum Oxide?
Aluminum Oxide serves as an abrasive in sandpaper and cutting tools, a refractory material in furnace linings, a substrate in electronic circuits, and as a key component in advanced ceramics. Its chemical inertness makes it ideal for laboratory equipment and medical implants.
How does Aluminum Oxide compare to Silicon Carbide in abrasive applications?
While both are hard abrasives, Aluminum Oxide is tougher and less prone to fracturing, making it better for grinding high-tensile materials like steel. Silicon Carbide is harder but more brittle, better suited for low-tensile materials like cast iron. Aluminum Oxide also generates less heat during grinding operations.
What safety precautions should be taken when handling Aluminum Oxide powder?
Always use NIOSH-approved respiratory protection when handling fine Aluminum Oxide powder to prevent inhalation. Wear protective gloves and goggles to prevent skin/eye contact. Ensure proper ventilation in work areas and avoid creating dust clouds. For large quantities, use dust collection systems.
Technical Properties Table
| Property | Value | Test Method |
|---|---|---|
| Flexural Strength | 300-400 MPa | ASTM C1161 |
| Compressive Strength | 2000-3000 MPa | ISO 18515 |
| Thermal Expansion | 8.0 x 10⁻⁶/°C (20-1000°C) | ASTM E228 |
| Volume Resistivity | 10¹⁴-10¹⁶ Ω·cm | ASTM D257 |
Available Forms
- Powders (various mesh sizes from 60 to 3000)
- Precision-ground substrates
- Beads and grinding media
- Custom-shaped components
- Fused grains
- Thermal spray powders
Industry Applications
Aluminum Oxide is indispensable in multiple sectors:
- Abrasives: Blasting media, grinding wheels, sandpaper
- Refractories: Kiln furniture, furnace linings
- Electronics: IC substrates, insulating washers
- Medical: Dental implants, prosthetic components
- Chemicals: Catalyst supports, filtration media