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Spherical micro-powder possesses excellent press-forming and sintering properties, which are extremely beneficial for producing high-quality ceramic products.
Using alumina balls as polishing abrasives can avoid the formation of scratches.
In the petrochemical industry, increasingly high requirements are put forward for the pore size distribution and pore structure of alumina carriers. Spherical alumina powder can regulate the pore size and its distribution of the formed catalyst carrier particles by adjusting the particle size configuration.
Spherical alumina used directly as a catalyst can reduce wear and tear, prolong the service life of the catalyst, thereby lowering the production cost.
When spherical alumina powder particles are sprayed on metals, plastics, etc., they can greatly improve the surface hardness, corrosion resistance, wear resistance and fire resistance. It is used for surface protection of machinery, cutting tools, chemical pipelines and other components.
Spherical alumina powder has a high bulk density, which can reduce the scattering of luminophores and effectively minimize the loss of transmitted light, thereby improving light transmittance.
Due to its excellent electrical, thermal and mechanical properties, spherical alumina is widely used in the field of semiconductor electronic packaging.
| Parameter | 95% Alumina Beads | 99% Alumina Beads |
|---|---|---|
| Material Purity | 95% Al₂O₃ | 99% Al₂O₃ |
| Density | 3.6–3.7 g/cm³ | 3.8–3.9 g/cm³ |
| Hardness (Vickers) | ≥1000 HV | ≥1200 HV |
| Fracture Toughness | 3.5–4.0 MPa·m¹/² | 4.0–4.5 MPa·m¹/² |
| Wear Rate | ≤0.008%/1000 hours | ≤0.005%/1000 hours |
| Diameter Range | 1–20 mm | 0.5–15 mm |
| Sphericity | ≤0.01 mm | ≤0.005 mm |
| Surface Roughness (Ra) | ≤0.08 μm | ≤0.05 μm |
| Max Operating Temperature | 1200°C | 1600°C |
| Chemical Resistance | Resistant to acids (except strong alkalis) | Highly resistant to most acids and weak alkalis |
Spherical alumina powder is widely utilized in high-performance ceramics, grinding and polishing media, petrochemical catalyst carriers, surface protective coatings, luminescent materials, and semiconductor electronic packaging.
99% Alumina Beads offer higher material purity, greater Vickers hardness (≥1200 HV), lower wear rates (≤0.005%/1000 hours), and higher maximum operating temperatures (up to 1600°C) compared to 95% Alumina Beads.
The smooth spherical shape prevents surface scratching during precision polishing and reduces equipment wear, resulting in consistent surface quality and extended abrasive service life.
When thermal-sprayed onto metals or plastics, spherical alumina significantly enhances surface hardness, wear resistance, corrosion protection, and thermal resistance for cutting tools, machinery, and chemical pipelines.
Due to its high bulk density, spherical alumina powder reduces light scattering within luminophores and minimizes transmitted light loss, noticeably boosting overall light transmittance.
