Spherical Alumina (Al2O3) Powder, also known as alumina microspheres, is a widely used material in various industries due to its unique properties and versatility.

Spherical Alumina (Al2O3) Powder Uses

Spherical alumina powder has a wide range of uses and is mainly applied in the following fields:

• Thermal conductivity filler: thanks to its high thermal conductivity (up to 200W/mK or more), spherical alumina powder can effectively improve the thermal conductivity of silica gel, epoxy resin, plastics and other materials, which is widely used in the fields of heat dissipation of electronic devices, thermal conductivity of automotive parts, and thermal insulation of chemical pipelines.
• Wear-resistant materials: with high hardness (Mohs hardness up to 9 or more) and high wear resistance, spherical alumina powder can be used to manufacture wear-resistant parts, abrasives and polishing materials, effectively extending the service life of machinery and equipment, and improve production efficiency.
• Catalyst carrier: the high specific surface area (up to 100m2/g or more) and good activity of spherical alumina powder make it an ideal catalyst carrier, which can significantly improve the efficiency of catalytic reaction and reduce the production cost, and it is widely used in the chemical industry, petroleum, medicine and other industries.
• Other uses: spherical alumina powder can also be used in ceramics, electronics, medicine and other fields, such as the manufacture of ceramic tiles, electronic components, medical devices and so on.

Properties of spherical alumina (Al2O3) powder

Spherical alumina powder has the following outstanding characteristics:

• High sphericity: sphericity ≥95%, good fluidity, easy to disperse, can effectively avoid powder agglomeration, improve the filling effect and processing efficiency.
• High purity: Al2O3 content ≥ 99.9%, low impurity content, to ensure the stability and reliability of the material, suitable for demanding application scenarios.
• High specific surface area: the specific surface area can reach more than 100m2/g, with strong adsorption ability, which can improve the catalyst activity and enhance the bonding force between the material and other substances.
• High thermal conductivity: the thermal conductivity can reach more than 200W/mK, which is an ideal thermal conductivity material and can effectively solve the heat dissipation problem.
• High abrasion resistance: Mohs hardness can be up to grade 9 or more, wear-resistant, long service life, can reduce maintenance costs.

Application of spherical alumina powder

Electronic field:

• As a thermally conductive filler, it is used in the manufacture of heat dissipation materials for electronic components, such as CPU heat sinks, LED lamp heat sinks, etc., to enhance the heat dissipation efficiency of electronic equipment and ensure its stable operation.
• As an encapsulation material, it is used in the manufacture of encapsulation body of electronic components, to improve the high temperature resistance, corrosion resistance and impact resistance of electronic components, and prolong the service life.
• As a conductive material, used in the manufacture of circuit boards, wires and cables, etc., to improve the conductive efficiency and reduce resistance loss.

Automotive field:

• As a wear-resistant material, it is used in the manufacture of automobile brake pads, cylinder blocks, pistons and other parts to improve the wear resistance and service life of automobiles and reduce maintenance costs.
• As a thermally conductive material, it is used in the manufacture of automobile engine radiators, water tanks and other components to enhance the heat dissipation efficiency of automobiles and reduce fuel consumption and emissions.

Mechanical field:

• As a wear-resistant material, it is used in the manufacture of bearings, gears, seals and other mechanical parts to improve the wear resistance and service life of mechanical equipment and reduce the failure rate.
• As a polishing material, it is used for polishing precision instruments, optical devices, etc. to improve surface finish and precision.

Chemical field:

• As a catalyst carrier, used in the manufacture of chemical products, such as catalysts, fillers and auxiliaries, to improve the efficiency of catalytic reaction and reduce production costs.
• As fillers, used to improve the performance of chemical products, such as enhancing the strength and abrasion resistance of plastics, improving the elasticity and aging resistance of rubber.
• As an additive, it is used to improve the processing properties of chemical products, such as improving the fluidity and dispersibility of coatings and lowering the sintering temperature of ceramics.

Building materials field:

• As a ceramic raw material, it is used in the manufacture of ceramic bricks, refractory materials and decorative materials, to improve the strength, hardness and abrasion resistance of ceramics, and to prolong the service life.
• As an additive, it is used to improve the performance of building materials, such as improving the strength and durability of concrete, enhancing the waterproofing and seepage resistance of waterproof materials.

Manufacturing Methods for Spherical Alumina (Al2O3) Powder

There are several established methods for the production of Spherical Alumina Powder, each with its own advantages and characteristics. Include:

1. Chemical precipitation
2. Hydrothermal synthesis
3. Sol-gel processing
4. Spray drying

Conclusion

Spherical Alumina (Al2O3) Powder is a versatile and indispensable material, with a wide range of applications across diverse industries. Its unique properties, including high surface area, thermal stability, and chemical purity, make it a valuable asset in today’s rapidly evolving technological landscape. As research and development continue, the future of Spherical Alumina Powder holds exciting prospects for the advancement of various industries and the betterment of our world.