Study Of Structural Properties Of Mn-Zn Ferrite Doped With Co Using W O Microemulsion

In this thesis, we use ferric chloride,manganese chloride, zinc sulfate and cobalt chloride as raw material to prepare nanomaterials doped with cobalt, manganese zinc ferrite.At the same time, make preparation of high-performance for opening a new process routes of making Mn-Zn ferrite. And for the next use of the iron vitriol dreg of yellow sodium that Jinchuan company stored. Northwest Yongxin Group for Preparation of nano-materials, high-performance coatings doped foreshadowed.In the experiment, MnZn ferrite is prepared by the reverse micro emulsion method, so that we can control the particle size and shape.This article focuses on the impacts of the preparation with different doping content of Co2+(X= 0,0.1,0.2,0.3,0.4,0.5) by micro emulsion method on the Mn Zn ferrite nanoparticles structure and its magnetic properties. And the same doping content of Co2+ was also studied in the condition of calcined and uncalcined to find the impacts on the Mn Zn ferrite nanoparticles structure and its magnetic properties. And characterize X-ray diffraction(XRD),scanning electron microscopy (SEM), vibrating sample magnetometer (VSM) and X-rayenergy dispersive spectroscopy(EDS) on CoxZn0.5Mn1-xFe1.5O4, the results show that:Successfully prepared CoxZn0.5Mn1-xFe1.5O4 doped different content of Co2+by using microemulsion method, EDS analysis shows that, element Co replaces element Zn and determined the composition and molecular formula of MnZn cobalt ferrite. With the content of element Co increasing, the content of element Mn decreases, while elements Fe and Zn basically remain the same.XRD shows that both samples calcined or uncalcined are single spinel structures without other impurity. At the same time adding moderate amount of Co2+enlarge ferrite particles in size, but excess doping make the particle size decrease. The results of the characterization of XRD and SEM are the same. In the case of uncalcined, the average particle size is less than 15nm, and the shape of spherical, in the case of being burnt, the average particle size is less than 30nm, also spherical.Study of the impact of the magnetization and coercive force on the Mn-Zn ferrite in the condition of Co2+doped with different contents in both calcined and uncalcined circumstances, the results show:With the increased amount of Co2+doped, the magnetization and coercive force on both calcined and uncalcined samples are increased than before, that Co2+ doped particles can increase the magnetization and the coercivity. Magnetization and coercive force in the case of calcined are first increase then decreases and then increases and then decreases in the law. And coercive force corresponding to the maximum and minimum values are consistent with the doping amount, when X=0.4, they reached the maximum. In the case of uncalcined,magnetization and the coercivity reaches the maximum with corresponding doping the same way, and it reached the maximum when X=0.3.The magnetization greater in the case of uncalcined, while coercive force is greater when it is calcined.