Spherical Alumina Powder

A Brief Overview of Spherical Aluminum Oxide Powder

Spherical Aluminum Oxide (Al₂O₃) powder is an advanced material with a unique geometrical form in which the particles have a nearly perfect spherical structure. Compared to traditional irregularly shaped alumina, spherical alumina has a more uniform particle size distribution and higher flowability, which not only helps to reduce frictional resistance during processing, but also improves the filling density of the material. This powder has found a place in many high-tech applications due to its excellent physical and chemical properties, such as high melting point, good electrical insulation and chemical stability. Spherical alumina is widely used in electronic packaging, ceramic substrates, composite materials, and catalyst carriers, driving technological progress in related industries.

Advantageous features of spherical alumina powder

Spherical alumina powder brings multiple advantages with its unique shape. First, because the particles are spherical, the contact area between them is reduced, which significantly reduces wear and friction, especially important for industrial applications that require frequent movement or handling. Second, spherical alumina powders offer excellent flowability, which makes it easier to mix with other materials and allows for better filling of molds during the molding process, increasing productivity. In addition, its high purity and uniform particle size ensure product stability and consistency, thereby reducing defect rates. Further, spherical alumina has excellent thermal conductivity, which can be used to manufacture electronic components that dissipate heat efficiently. Finally, the material also exhibits good mechanical strength and compressive properties, making it suitable for use in a variety of harsh operating environments.

Specifications Table for Spherical Alumina Powder

Parameter	Specification
Material Composition	High-purity alumina (Al₂O₃)
Particle Morphology	Nearly spherical
Particle Size Distribution	Typically ranges from 1 µm to 50 µm
Purity Level	≥99.8%
Bulk Density	Approximately 1.0 - 1.5 g/cm³
Tap Density	Higher than bulk density, depends on particle size
Surface Area	Moderate, varies with particle size
Color	White
Thermal Conductivity	Good
Electrical Insulation	Excellent
Chemical Stability	Excellent, inert to most chemicals
Packaging	Vacuum-sealed bags or containers for protection

Production process for spherical alumina powder

The preparation of spherical alumina powders usually involves complex process steps and techniques. The first step is the selection of raw materials, which requires the use of high-purity aluminum salts as precursors. Then comes the solution preparation stage, where the precursors are dissolved in a suitable solvent to form a homogeneous solution. For spherical alumina, the next key step is spray drying or flame synthesis. Spray drying rapidly evaporates water by spraying the solution into a hot environment, while flame synthesis directly converts the precursors into alumina microspheres in a combustion gas. Both methods are effective in controlling particle size and morphology. Afterwards, the resulting primary products are subjected to high-temperature sintering to ensure the purity and crystallinity of the final product. During this process, temperature and atmosphere conditions must be strictly controlled. The finished product also undergoes post-treatment processes such as sieving and cleaning to obtain the desired particle size distribution and surface quality. Finally, the products undergo strict quality testing, including particle size analysis and purity testing, to ensure compliance with industry standards.

Application areas of spherical alumina powder

Spherical alumina powder has been widely used in many high-tech fields due to its excellent characteristics. In the electronics industry, it is ideal for use as a high-performance thermally conductive filler to enhance the thermal performance of plastic, rubber and ceramic substrates while maintaining electrical insulation. In the field of precision grinding and polishing, spherical alumina has become a key material in the manufacture of ultra-fine grinding media due to its low friction characteristics and good fluidity, and is particularly suitable for the surface treatment of semiconductor wafers and other high-precision parts. In addition, spherical alumina is used as a highly efficient catalyst carrier, with its large specific surface area and uniform pore structure facilitating catalytic reactions. In the pharmaceutical industry, it is used as a carrier in drug delivery systems to provide a stable platform for drug release. And in the coatings and cosmetics industry, spherical alumina provides UV protection and increases the gloss and texture of products. In short, spherical alumina powders are expanding into new application scenarios due to their versatility and adaptability.

Company Profile

Alumina Technology Co., Ltd.! We focus on the research and development, production and sales of alumina products, serving the electronics, ceramics, chemical and other industries. Since its establishment in 2005, the company has been committed to providing customers with the best products and services, and has become a leader in the industry through continuous technological innovation and strict quality management.

Our products includes but not limited to Alumina Boat, Alumina Crucible, Alumina Dish, Alumina Foam Filter, Alumina Plate, Alumina Rod, Alumina Bar, Alumina Balls, Filter Alumina, Nano Alumina Powder, Spherical Alumina Powder, ect. please feel free to contact us.(nanotrun@yahoo.com)

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

5 FAQs on Spherical Aluminum Oxide Powder

Q: What is the difference between spherical alumina powder and ordinary alumina powder?
A: The main difference lies in the particle morphology. Spherical alumina powders have rounded particles with better flowability and lower coefficient of friction, making them more suitable for demanding applications.
Q: Are spherical alumina powders prone to agglomeration?
A: Although spherical alumina powder has good dispersibility, slight agglomeration may still occur in some cases. Appropriate dispersion measures should be taken according to specific needs.
Q: Can spherical alumina powder withstand high temperatures?
A: Spherical alumina powders have a high melting point and can generally withstand high temperatures in excess of 1600°C, making them suitable for a wide range of high temperature applications.
Q: How does the particle size of spherical alumina powder affect its performance?
A: Particle size directly affects the flowability and packing density of the material, with smaller particle sizes usually meaning higher specific surface area and better mechanical properties.
Q: What is the market price of spherical alumina powder?
A: Prices are influenced by factors such as production process, purity grade, particle size specification and market demand. High quality and special specifications tend to be more costly.