Spherical Alumina Powder

Semicorex spherical alumina powder is manufactured by melting and calcining single-crystal alumina at high temperatures, followed by precision sorting and purification procedures. It is widely adopted as filler in thermal interface materials, conductive engineering plastics and thermal copper-clad boards thanks to its excellent characteristics as follows.

1. Superior Thermal Conductivity

Semicorex spherical alumina powder exhibits regular spherical geometry, which allows for larger contact areas and more uniform particle distribution during heat conduction, thereby greatly prevents discontinuous heat conduction brought on by irregular particle shapes. With this characteristic, the more continuous and smoother thermally conductive network formed by Semicorex spherical alumina powder inside the composite materials can effectively reduce thermal resistance and improve the overall thermal conductivity of composite materials.

2. Excellent flowability and dispersibility

Semicorex spherical alumina powder features high sphericity, a small specific surface area, and controllable particle size. Different from irregular-shaped alumina powder, Semicorex spherical alumina powder has less friction between particles, which enables excellent flowability and dispersibility under high filler loading for silicone and epoxy resin and prevents thermal conductivity fluctuations resulting from localized particle agglomeration.

3. Exceptional chemical stability

Semicorex spherical alumina powder features exceptional chemical stability and hardly reacts with the surrounding medium. Semicorex spherical alumina powder can maintain stable performance in harsh operating conditions with strong acidic, strong alkaline, or high temperatures without corrosion, oxidation, or thermal deterioration, thereby effectively sustaining long-lasting stable performance of thermal conductive materials.

Applications of Semicorex spherical alumina powder

Benefiting from its superior comprehensive properties, our spherical alumina finds extensive applications as follows:

1.Thermal interface materials: conductive silicone sheets, thermal grease, potting glue, thermal adhesive tape, phase change materials

2.Conductive engineering plastics: LED covers, switch & electronic housings, electrical thermal parts

3.Thermally conductive aluminum-based copper clad laminates: high-power LED substrates, power circuit boards

4.Alumina ceramic filters

5.Thermal spray coatings

6.Electronic ceramics