KOSNANO supplies high-purity alpha alumina powder for industrial coating systems that require improved hardness, scratch resistance, wear resistance, thermal stability, and surface durability.
We support particle size matching, surface modification, sample testing, and technical document preparation based on your formulation requirements.
99.99% Assay
100 nm Particle Size
α-Phase Al₂O₃
SSA 5–8 m²/g
Alpha Alumina Powder for Coatings
Alpha-alumina powder is a stable crystalline alumina material ， which is commonly used as a functional powder in coatings industry . Compared to mixed crystalline alumina powders, alpha-alumina exhibits higher hardness, heat resistance, and better chemical stability, that making it more suitable for coating formulations requiring long-term surface protection.
KOSNANO is committed to becoming an expert in functional powder solutions. We help coating manufacturers obtain matched alpha-alumina powder and formulation technical support based on coating type, resin system, target hardness, dispersion method, film thickness, and final surface performance requirements.
The Specification
| Product Type | Alpha alumina powder / α-Al₂O₃ |
| Formula | Al₂O₃ |
| Appearance | White powder |
| Crystal Structure | Alpha phase |
| Purity / Assay | 99.99% |
| Average Particle Size | 100 nm |
| pH Value | 7.20 |
| Specific Surface Area | 5–8 m²/g |
| Bulk Density | 0.35–0.55 g/cm³ |
| Loss on Drying | ≤0.5% |
| Si Content | ≤0.003% |
| Fe Content | ≤0.005% |
Note: The above values are based on available reference test data. Customized specifications can be discussed according to coating formulation requirements.
The Value of Our Alpha Alumina Powder in Industrial Coatings
If you want to improved wear resistance in your resin coatings, our premium alpha-alumina powder is a goods choice, which have high-hardness crystalline structure, can effectively enhances coating performance in harsh industrial environments..
- Improves coating hardness and surface abrasion resistance
- Supports scratch resistance in protective coating systems
- Helps enhance wear resistance in industrial equipment coatings
- Provides inorganic reinforcement in composite coatings
- Supports thermal stability depending on the formulation system
The Applications of Our Alpha Alumina Powder
| Application Area | Function of Alpha Alumina Powder |
|---|---|
| Scratch-resistant coatings | Helps improve surface hardness and resistance to mechanical damage |
| Wear-resistant coatings | Supports durability in friction or abrasion-prone environments |
| Ceramic coatings | Provides inorganic reinforcement and thermal stability |
| Protective industrial coatings | Helps improve coating film strength and service performance |
| Metal surface coatings | Supports hardness and anti-wear performance |
| Composite coatings | Works as a functional filler for performance enhancement |
| High-temperature coatings | Supports thermal resistance depending on the full formulation system |
Grade Selection Guide for Coating Formulations
In practical applications, you may encounter different challenges because your solvent type may be alcohol, ester, or ether. Our technical team can formulate different Alpha Alumina Powder dispersions to meet your specific application needs..
| Requirement | Recommended Selection Direction |
|---|---|
| Better scratch resistance | Fine particle alpha alumina with good dispersion behavior |
| Higher hardness | High-purity α-Al₂O₃ with controlled particle size |
| Better coating smoothness | Narrow particle size distribution and optimized dispersion |
| Water-based coating compatibility | Surface treatment or dispersion support may be required |
| Solvent-based coating compatibility | Grade selection based on resin and solvent system |
| Reduced sedimentation risk | Particle size, surface area, and dispersion process should be evaluated |
| Customized performance | Particle size, surface modification, and dosage can be adjusted |
Customization Support
As a functional powder expert and alumina powders manufacturer, KOSNANO understands conventional alpha-alumina powders and is dedicated to meeting diverse application needs. We offer customized alpha-alumina powder services in various specifications and morphologies to meet your formulation requirements. Please contact our technical team and inform us of your required particle size, coating system, and application scenario. We will recommend the best model and provide technical documentation support.
- Particle size and surface area discussion
- Surface treatment and dispersion behavior support
- TDS, SDS, COA, and sample support for qualified B2B buyers
- Standard packaging and customized bulk packaging options
Need Alpha Alumina Powder for Coating Formulations?
Not sure which alpha alumina powder grade is suitable for your coating system? Send us your application, resin system, target performance, and required particle size. KOSNANO will recommend a suitable grade for testing.
FAQ
What is alpha alumina powder?
Alpha alumina powder is a crystalline form of aluminum oxide, also known as α-Al₂O₃. It is widely used as a functional inorganic powder in coatings, ceramics, polishing, thermal materials, and composite systems.
Why is alpha alumina used in industrial coatings?
Alpha alumina is used in coatings because of its high hardness, thermal stability, chemical resistance, and wear resistance. It can help improve surface durability and mechanical performance in selected coating formulations.
Can KOSNANO provide 100nm alpha alumina powder?
Yes. KOSNANO can supply 100nm alpha alumina powder and recommend suitable grades according to coating application, resin system, dispersion process, and target performance.
Can alpha alumina powder be customized?
Yes. Particle size, surface treatment, dispersion behavior, and packaging can be discussed based on customer requirements.