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High-purity aluminum oxide (Al₂O₃) powder is a premium ceramic material known for its exceptional hardness, thermal stability, and chemical resistance. It is widely used in advanced ceramics, abrasives, catalysts, electronic components, and specialized coatings. Due to its superior insulating properties and structural durability, aluminum oxide plays a crucial role in precision engineering, semiconductor applications, and high-performance industrial solutions.
Product Overview
High-purity aluminum oxide powder is a white powder with a chemical composition of Al₂O₃ and an extremely high purity of 99.99%. The powder is available in the form of white fused aluminum oxide or brown fused aluminum oxide and is widely used in various high-precision industrial applications. With excellent chemical stability and high-temperature resistance, this powder performs exceptionally well in demanding environments.
Features
- Extremely high purity (99.99%), suitable for precision processing.
- Excellent chemical stability and strong corrosion resistance.
- High-temperature resistance, ideal for use in harsh industrial environments.
- Fine particle sizes (20nm, 30nm, 50nm) are suitable for high-precision applications.
Applications
High-purity aluminum oxide powder is widely used in applications such as aluminum oxide polishing products, high-temperature ceramic parts, wear-resistant ceramic parts, electronic substrates, high-alumina ceramics, and rollers. It is also suitable for high-alumina refractories, amorphous refractories (e.g., high-alumina castables), and products that meet MIL-A-22262B standards.
| Property | Unit | ≥95 | ≥99 | ≥99.5 | ≥99.8 |
| Bulk Density | g/cm³ | 3.7 | 3.8-3.85 | 3.85 | 3.85 |
| Hardness | MPa≥ | 86 | 88 | 88 | 88 |
| Bending Strength | HRA≥ | 300 | 350 | 400 | 400 |
| Max Operating Temp | ℃ | 1500 | 1500 | 1500 | 1500 |
| Coefficient of Thermal Expansion | ×10⁻⁶/℃ | 7.5 | 8.2 | 8.2 | 8.2 |
| Dielectric Constant | tr(20℃,1MHz) | 9 | 9.2 | 9.2 | 9.2 |
| Dielectric Loss | tanδ×10⁻⁴,1MHz | 3 | 2 | 2 | 2 |
| Volume Resistivity | cm(20℃) | 10¹³ | 10¹⁴ | 10¹⁴ | 10¹⁴ |
| Breakdown Strength | KV/mm,DC≥ | 20 | 20 | 20 | 20 |
| Acid Resistance | mg/cm²≤ | 0.7 | 0.7 | 0.7 | 0.7 |
| Alkali Resistance | mg/cm²≤ | 0.2 | 0.1 | 0.1 | 0.1 |
| Abrasion Resistance | g/cm²≤ | 0.2 | 0.1 | 0.1 | 0.1 |
| Compressive Strength | MPa≥ | 2500 | 2500 | 2500 | 2800 |
| Flexural Strength | MPa≥ | 200 | 350 | 350 | 350 |
| Elastic Modulus | GPa | 300 | 350 | 350 | 350 |
| Poisson's Ratio | - | 0.2 | 0.22 | 0.22 | 0.22 |
| Thermal Conductivity | W/m·K(20℃) | 20 | 25 | 25 | 25 |
