| The soft magnetic ferrite material is a very wide range of functional material, the most common is NiZn ferrite and MnZn ferrite. The ferrite material has the advantages of high permeability, high resistivity and low loss, not only the gradual strengthening of applications in automatic control, computing technology, instrumentation and communication broadcasting of the electronics industry sector, and in astronauts, information display, satellite communications, and pollution treatment and other industries also have broad prospects. The MnZn ferrite is mainly used in high frequency field and the NiZn ferrite is mainly used in the low frequency field, MnZn ferrite resistivity lower5-6order of magnitude than the NiZn ferrite and need higher sintering temperature. In this paper, we use the different doping preparation of NiCuZn ferrite. There are many preparation methods to prepare ferrite, the Sol-Gel SHS is a production process simple, easy control of the process, high purity preparation ferrite method. This article is based on previous research, using the Sol-Gel SHS prepared different doping ratio NiCuZn ferrite, applies X-ray diffractiometer, vibrating sample magnetometer and Mossbauer spectrometer to research microstructure and magnetic properties of the sample.The main results of this paper are given as follows:1. We research rare earth doped and composite doped NiCuZn ferrite’s present situation.2. The Sol-Gel SHS were prepared Ni0.6Cu0.2Zn0.2CexFe2-xO.4ferrite, combined with the sample’s XRD figure, M-H figure and Mossbauer spectra, and analysis the rare earth cerium doped influence to the microstructure and magnetic properties of the NiCuZn ferrite. We analysis the sample on the XRD can know it is typical spinel structure, the powder grain size is about30nm. The hysteresis loop at T=300K of the samples showed that, this ferrite is typical ferrimagnetic, and coercive force (He) increase with increase of the doped ion. and the saturation magnetization (Mv) first increase and then decrease with increase of the doped ion. We can know through carries on the Mossbauer spectrum measurement, with Ce3+doping content increases, A absorption area and hyperfine field relative reduction, but B absorption area increases and hyperfine field have little change. 3. The Sol-Gel SHS were prepared Ni06-xCu0.2Zn0.2CoxBiyFe2-yO4ferrite, combined with the sample’s XRD figure, M-H figure and Mossbauer spectra, and analysis the composite doped influence to the microstructure and magnetic properties of the NiCuZn ferrite. The XRD analysis showed that, with doping amount increase of the Bi ion, sample grain density increases. The hysteresis loop at T=300K of the samples showed that, this ferrite is typical ferrimagnetic, and coercive force (He) increase with increase of the doped ion, and the saturation magnetization (Ms) first increase and then decrease with increase of the doped ion. Through its Mossbauer spectrum analysis, the absorption area of A site is relatively reduced and the absorption area of B site is relative increase with compound doped increase. |
