Investigation on the micro-structure and magnetic properties of LMZBS-Bi2O3 doped low-temperature sintered NiCuZn ferrites

Abstract

NiCuZn ferrites were widely used in communication and electronic information fields because of the high frequency, high impedance, wide band and low power loss. In this work, it reports that the (Ni_0.2Cu_0.2Zn_0.6O)_1.03(Fe₂O₃)_0.97 ferrites were synthesized based on the solid-state reaction method and LMZBS (Li₂CO₃-MgO-ZnO-B₂O₃-SiO₂)-Bi₂O₃ were also used as the dopant to regulate the micro-structure and magnetic properties. The crystal phase and micro-structure of the LMZBS-Bi₂O₃ doped NiCuZn ferrites were characterized by x-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The magnetic properties including saturation magnetization (Ms), coercive force (Hc), Q-factor and permeability as well as the power loss (Pcv) were investigated and analyzed in detail. The results showed that LMZBS (0.2wt%)-Bi₂O₃ (0.3wt%) doped NiCuZn ferrites exhibited a uniform and dense microstructure, and possessed the highest Ms, Q factor and magnetic permeability as well as the lowest Hc and Pcv. Overall, LMZBS-Bi₂O₃ doped NiCuZn ferrites possessed the outstanding micro-structure and magnetic properties, which make it promising for a series of applications.