Comparison of Thermally Conductive Fillers

Important Points for Thermally Conductive Fillers

Thermal conductivity is an important factor for many applications in the electronics industry. To improve the thermal management of these components, thermally conductive fillers are often added to composites. There are a variety of thermally conductive fillers available on the market, each with different properties and advantages.

Aluminum oxide, or alumina, is a common choice among thermally conductive fillers. It is inexpensive, chemically inert, and has a low electrical conductivity, making it ideal for electrically sensitive applications. However, it has a low thermal conductivity and its spherical shape can impede flowability. Copper is another widely used filler, as it is highly conductive and naturally occurring. Its excellent thermal and electrical conductivity makes it a great choice for materials that require both properties. However, it has poor thermal properties at high temperatures. 

Other thermally conductive fillers include graphite, boron nitride, and carbon nanotubes. Graphite is a low-cost material that is highly thermally and electrically conductive. Boron nitride is a synthetic material that is highly thermally conductive but has poor electrical properties. Carbon nanotubes are the most thermally conductive material on the list, but they are expensive and difficult to work with. 

The choice of thermally conductive filler should be based on the properties required for the application and the cost of the materials. Different fillers will have different advantages and disadvantages, and it is important to take these into account when selecting the best material for the job.

Video 01: Thermal Conductive Gap Fillers Tensile Strength Test | Gap Filler | AOK