Abstract
Flexible electronics is attracting widely interests for next generation electronics, especially for RF application. In this work, a flexible composite film with good magnetic-dielectric properties at high frequency was synthesized. Firstly, we prepared NiCuZn ferrite particles with uniform grains (~1.57 µm) at low temperature. Results indicated that the ferrite possessed high permeability (μr′ = 472.8), low loss (tanδμ = 0.015 and tanδε = 0.0063) and high saturation magnetization (Ms = 61.77 emu/g). The flexible composite films were prepared by mixing the NiCuZn particles and PDMS. The microstructures, high frequency magnetic and dielectric properties of the composite films with various NiCuZn particles were investigated. Results indicated that the NiCuZn particles not only can uniformly blend with PDMS, but also improve magnetic properties of the PDMS film at high frequency. At last, the flexible composite film possessed good magnetic properties (μr′ = 2.09 and tanδμ = 0.47) and dielectric properties (εr′ = 4.43 and tanδε = 2.32e-2) at 1 GHz. It was indicated that the flexible film can be utilized for high frequency flexible devices. The method is also a reference for developing high frequency wearable electronic devices.
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