Electromagnetic properties of low-temperature co-fired xPZT+(1-x)NiCuZn-ferrite composites

摘要

To adjust the dielectric constant and the initial permeability of NiCuZn-ferrite materials for suppressing electromagnetic interference, Pb_(0.95)Sr_(0.05)(Zr_(0.52)Ti_(0.48))O_3 (PZT) was introduced. The effects of PZT additive on the phase composition, densification, microstructures and electromagnetic properties of the ceramics with composition of xPZT+(1-x)NiCuZn-ferrite (where x = 0-25 wt%) were investigated. The results show that these composites are mainly of spinel phase, exhibiting relatively high dielectric constant and initial permeability due to the mutual effects of magnetization of NiCuZn-ferrite phase and polarization of PZT phase. Meanwhile, relatively high-quality factor (Q) and excellent frequency stability were obtained for the samples with PZT additive. These materials are expected to be used as embedded inductors or embedded capacitors.