Fabrication and dielectric properties of Ba_0.6Sr_0.4TiO₃ / acrylonitrile–butadiene–styrene resin composites

Ba_0.6Sr_0.4TiO₃ (BST)/acrylonitrile–butadiene–styrene (ABS) composites were prepared via solution casting method. Effects of volume fraction of BST on microstructure and dielectric properties of composites were studied. Dielectric constants were simulated by Lichtenecker, Maxwell, Landzu–Lifishitz, and Yamada models. It was found that the permittivity of BST/ABS resin composites increases from 4.5 to 18 while loss tangent from 0.021 to 0.082 at 1 kHz with BST fillers increasing from 10 to 40 vol%. The permittivity value calculated by Yamada’s model matched well with the experimental results and the deviation was less than 2% with a shape factor (n) of 3.2. The dielectric tunability of the composites improved with increasing the amount of BST fillers. Dielectric properties of ABS resins were enhanced by increasing BST fillers due to the interface polarization mechanism. The development of BST/ABS dielectric functional composites broadens the range of candidate materials for 3D printed electronic devices.