Low-temperature sintering and electromagnetic properties of ferroelectric–ferromagnetic composites

Ferroelectric–ferromagnetic composites were prepared by the usual ceramic technology combined with the sol–gel method and sintered at 900 °C to adapt to the low-temperature co-fired ceramic (LTCC) technology. The ferroelectric ceramics in reasonable amounts can effectively decrease the RF loss, dielectric loss and increase the saturation magnetization. Variations of permeability, dielectric constant and loss tangent with the frequency in the range of 1 MHz–1.8 GHz have been discussed. The microstructures of the sintered ceramics were analyzed by scanning electron microscope (SEM). The influences of different composition on the electromagnetic properties of the composites have been investigated.