Alumina Near-Spherical Powder
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Alumina Near-Spherical Powder is high-purity aluminum oxide with rounded particles, offering better flowability and packing density than irregular powders at a lower cost than fully spherical grades. It delivers good thermal conductivity, electrical insulation, and wear resistance for thermal sprays, ceramic fillers, and 3D printing.NexusX Advanced Materials, as a premier manufacturer and supplier of high-quality. Alumina (Al2O3) products, focuses on producing high-precision aluminum nitride silicon structural compenents through advanced technologies for diverse application fields.
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Alumina Near-Spherical Powder Data Sheet
Purity: | 99.9%-99.99% |
Morphology: | Near-spherical |
Appearance: | White Powder |
Alumina Near-Spherical Powder Descriptions
Alumina Near-Spherical Powder is a high-purity ceramic powder characterized by its rounded, nearly spherical particle shape. While not perfectly round, this morphology delivers significantly improved flowability and packing density compared to conventional angular or irregular powders, yet remains more economical to produce than fully spherical grades. The material exhibits good thermal conductivity, excellent electrical insulation, high wear resistance, and strong chemical inertness at elevated temperatures. It is commonly used in thermal spray coatings, ceramic-filled epoxy compounds for electronic packaging, refractory castables, and additive manufacturing processes where enhanced powder performance is required but ultra-high flowability is not critical. Its near-spherical shape also reduces abrasive wear on processing equipment such as nozzles, feeders, and mixing blades, extending tool life and lowering production costs.
Alumina Near-Spherical Powder Specifications
Product | Particle Size (D50) | PH | Morphology | Specific Surface Area | Electricity Conductivity | Moisture | SiO₂ | Fe₂O₃ | Na₂O |
μm | – | – | ㎡/g | μS/cm | % | ppm | ppm | ppm | |
NSAR-05 | 0.6 | 8.52 | Near-spherical | 4.4 | 30.52 | 0.1 | 466 | 92 | 81 |
NSM-1S | 0.69 | 8.69 | Near-spherical | 4.24 | 23.03 | 0.07 | 234 | 113 | 56 |
NSM-2S | 1.05 | 8.57 | Near-spherical | 2.40 | 16.34 | 0.08 | 310 | 95 | 26 |
Alumina Near-Spherical Powder Advantages
- Improved Flowability – The rounded, near-spherical shape reduces inter-particle friction, providing better flow than irregular angular powders, though slightly less than fully spherical grades.
- Higher Packing Density – Near-spherical particles pack more densely than irregular shapes, minimizing voids and improving the mechanical strength and thermal conductivity of final products.
- Lower Production Cost – Compared to fully spherical alumina powder, near-spherical powder is more economical to manufacture while still offering significant performance improvements over irregular powders.
- Reduced Equipment Wear – The smoother, rounded surface causes less abrasion to nozzles, feeders, mixing blades, and other processing equipment compared to sharp, angular particles.
- Good Thermal Conductivity – Enables efficient heat dissipation in composites, electronic packaging materials, and thermal interface applications.
- Excellent Electrical Insulation – Provides high dielectric strength, making it suitable for electrically insulating but thermally conductive filler applications.
- Superior Wear Resistance – Hard alumina particles offer durable protection against abrasion, erosion, and surface degradation in coatings and linings.
- Chemical Stability at High Temperatures – Resistant to oxidation and most corrosive environments, ensuring long-term reliability in refractory and high-temperature applications.
Alumina Near-Spherical Powder Applications
- Thermal Spray Coatings – Used in plasma and HVOF spraying to produce wear-resistant, corrosion-resistant, and thermal barrier coatings on metal and ceramic substrates.
- Electronic Packaging Fillers – Mixed with epoxy or silicone resins as thermally conductive but electrically insulating fillers for heat dissipation in power modules, LEDs, and IC substrates.
- Refractory Materials – Added to castables, ramming mixes, and gunning materials for kilns, furnaces, and incinerators requiring high thermal shock resistance.
- Additive Manufacturing (3D Printing) – Serves as a feedstock for powder bed fusion and binder jetting processes where ultra-high flowability is not critical but improved performance over irregular powder is desired.
- Ceramic Injection Molding – Combined with binders to mold precision ceramic parts such as insulators, nozzles, and wear-resistant components.
- Polishing and Lapping Abrasives – Provides uniform material removal for fine polishing of metals, glass, and optical components.
- Composite Reinforcements – Incorporated into polymers, metals, or ceramics to improve hardness, thermal conductivity, and dimensional stability.
- Catalyst Supports – Used as a carrier for catalysts in petrochemical and chemical processing applications due to its thermal stability and surface characteristics.
Alumina Near-Spherical Powder Packaging
Alumina Near-Spherical Powder is typically packaged in sealed, moisture-proof plastic bags, then placed in sturdy drum containers or fiber cartons to prevent contamination and ensure safe transport.
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- SAFETY DATA SHEET (SDS) -Alumina Near-Spherical Powder
FAQ
What is Alumina Near-Spherical Powder?
Alumina Spherical Powder is primarily used as a thermally conductive filler in electronic packaging, a feedstock for thermal spray coatings, a raw material for ceramic 3D printing, a catalyst support, and a polishing abrasive.
How does Alumina Near-Spherical Powder compare to fully spherical powder?
It offers slightly lower flowability and packing density than fully spherical powder, but is significantly more cost-effective, making it ideal for applications where ultra-high performance is not required.
What are the main advantages of Alumina Near-Spherical Powder?
Key advantages include improved flowability, higher packing density, reduced equipment wear, good thermal conductivity, electrical insulation, wear resistance, and lower production cost than spherical grades.
Is Alumina Near-Spherical Powder suitable for thermal spray coatings?
Yes, it is widely used in plasma and HVOF thermal spray processes to create wear-resistant, corrosion-resistant, and thermal barrier coatings on metal and ceramic surfaces.
What industries use Alumina Near-Spherical Powder?
Industries include electronics (thermal fillers), aerospace (thermal spray coatings), refractories, additive manufacturing, battery (separator coatings), polishing, and catalysts.
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