TRUNNANO has launched a surface-modified spherical alumina powder, marking progress in functional materials used across aluminium-related thermal management applications in electronics.

A KH570 silane coupling agent is used by the product for surface treatment and is designed to be used in high-performance thermal fillers with applications like thermal interface materials, thermally conductive potting compounds, conductive plastics and copper-clad laminates to support high demands for efficient heat dissipation in electronic components. 

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Spherical alumina is also used widely in such applications due to high thermal conductivity, high packing density and low abrasion, whereas conventional alumina powders face complications such as poor compatibility with organic materials, which can cause issues such as particle agglomeration, higher system viscosity and weaker thermal conduction networks and restricting performance in advanced use cases.

TRUNNANO said that their surface-modified alumina works around these complications through improved interfacial compatibility, which enables better dispersion within composite materials and more efficient thermal pathways.

According to CEO Roger Luo, the development reflects the company’s focus on improving product performance through innovation while also helping customers enhance thermal conductivity, streamline processing and reduce costs.

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The technical team has worked to solve problems linked to the performance of alumina powder. One of the main areas of focus was increasing the particle sphericity, which plays an important role in packing density and surface treatment effectiveness.

The development team has refined the high temperature spheroidization processes and stages, such as shaping, cooling or melting, which produced high purity alumina powder with a sphericity of ≥0.95, a smooth surface and a narrow particle size distribution, which provides for a more stable base for surface modification, allowing for a more uniform and densely coated layer. 

Also read: TRUNNANO develops high-purity spherical aluminum nitride for next-gen EVs

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