AlN Thermal Fillers for Power Electronics

In IGBT/SiC modules for new energy vehicles, heat generation is immense, and temperatures fluctuate drastically during acceleration and deceleration. If the thermal interface material (TIM) cracks or fails, the entire electronic control system could be at risk.

Aluminum Nitride thermal filler powder offers a coefficient of thermal expansion (CTE) closely matched to that of semiconductor chips, combined with ultra-high thermal conductivity. It efficiently extracts heat from SiC modules, reduces junction temperature fluctuations, and ensures the stability and longevity of the electronic control system. This is precisely why AlN filler for power module TIM is irreplaceable in new energy vehicle applications.

In photovoltaic inverters and energy storage converters, equipment is typically installed outdoors, exposed to sun, rain, and wide daily temperature swings—often operating reliably for over a decade. After moisture-resistant AlN passivation, the filler is dispersed into silicone or epoxy resins to produce high-performance potting compounds. AlN-epoxy potting composites offer both high thermal conductivity and excellent electrical insulation, effectively protecting internal power devices from moisture and contaminant ingress.

AlN particle gradation design also plays a critical role: by scientifically combining fillers of different particle sizes, denser packing can be achieved in AlN filler for thermal grease systems, balancing thermal conductivity and viscosity. It should be noted that automotive-grade power modules more commonly use gels, pads, and potting compounds, while grease-based systems are typically employed in serviceable applications such as CPUs and GPUs.

As a professional AlN filler supplier, we are committed to providing high-thermal-conductivity, high-reliability AlN powder solutions for the power electronics, new energy vehicle, and photovoltaic & energy storage sectors.

Xiamen Juci specializes in manufacturing High Purity AlN Powder, AlN Granule, Thermal Conductive Filler, and AlN Ceramics—products that have earned consistent recognition and positive feedback from customers worldwide. Should you have any requirements, please do not hesitate to contact us.

Contact: Jenny Qin / 진현혜 

Phone: +86 151-5177-8700

Wechat ID: JENNY-8866

Xiamen Juci Technology Co., Ltd.

Email: qinxianhui@chinajuci.com

Website: www.jucialnglobal.com