3M Boron Nitride Cooling Fillersfor Automotive

High Thermal Conductivity

xEVs - electromotive vehicles such as a hybrid or plug-in hybrid electric vehicles or fuel-cell electric vehicles - present new thermal challenges throughout the vehicle. In some applications, like power electronics, high heat needs to be dissipated from a small area. With an inherently high thermal conductivity, even a small amount of 3M Boron Nitride Cooling Fillers can boost the thermal conductivity of various polymers such as silicones, epoxies, and thermoplastics. 3M Boron Nitride Cooling Filler platelets, flakes, and agglomerates can be used to achieve either through-plane or in-plane heat dissipation, depending on your application needs.

With a material thermal conductivity of 400 w/mK in plane, 3M Boron Nitride Cooling Fillers is 8-20x more thermally conductive than alumina fillers (intrinsic) and 2 – 8x more thermally conductive when mixed in polymers.

Excellent Processability

Abrasive fillers can wear away at equipment being used to process the materials. Compared to other fillers, 3M Boron Nitride Cooling Fillers are one of the least abrasive. This softer material can minimise equipment wear which may help to extend your equipment lifetime.

As you add fillers to your polymer matrix to boost thermal conductivity, the viscosity of the matrix changes. 3M’s multiple cooling filler grades allow you to define the viscosity to optimize your formulation and tailor to your application need.

Electrical Insulation

Compared to other ceramic fillers, 3M Boron Nitride Cooling Fillers provides the highest electrical resistivity at >10¹⁵ Ohm*cm³ with a high breakdown strength. Not only can you boost the thermal conductivity properties of your matrix, you can tackle multiple properties with this one filler by also making it more electrically insulating. This can help to shield more sensitive components and prevent unwanted arcing.

High electrical insulation and breakdown strength are main requirements for thin insulation foils.

Lightweight

With a low density of 2.25 g/cm³, adding 3M Boron Nitride Cooling Fillers to your compound will boost needed properties while keeping the compound density at 1.2 – 1.6 g/cm³.

The low compound density is favorable for housings or LED lamp sockets for example as higher weight aluminum parts can be replaced by the thermal conductive polymer.

Low Loss Factor

In a 5G connected and autonomous driving world, vehicles will generate and process more data at higher speeds and frequencies. Sensors and other automotive electronic designs are smaller, higher-performing – and produce a lot more heat. Also, as signal transmission and frequencies increase, especially in the millimeter wave spectrum, the risk of signal loss intensifies. Managing these challenges will help improve automated driving system performance and reliability for increased safety on the road.