Design of Co2Z ferrite/PDMS composites with enhanced magnetic-dielectric properties for flexible electronics

Abstract

In this study, Ba_1.5Sr_1.5Co_1.8Mn_0.2Fe₂₃O₄₁ ferrite particles were prepared by the solid-phase reaction method and dispersed in the PDMS matrix. The obtained composite films were systematically studied. The ferrite particles were dispersed uniformly in the PDMS matrix, except the sample at x = 2 g, which showed agglomeration. With the increase of filler content, the saturation magnetization of the composite films increases, and the permeability and permittivity also increase to different degrees. In particular, the dielectric loss is low (tan𝛿_ε ⪅ 0.005 at 500 MHz). The filling of Co₂Z ferrite improves the high-frequency magneto-dielectric properties of PDMS, and the composite films have potential in flexible electronics.