Preparation And Application Of Manganese-zinc Ferrite Nanoparticles

As an important magnetic material, manganese-zinc ferrite, due to the great application and long-term basic research, has been widely used in the various areas such as transformers, coil cores, magnetic heads and so on. In recent years, the interests in Mn-Zn ferrite nanoparticles are growing based on their potential applications in magnetic fluid hyperthermia and magnetorheological fluid because of its soft magnetic property, high stability and other characteristics.The preparation, characterization and application of Mn-Zn ferrites are investigated. Details are as follows:1. The Mn-Zn ferrite nanoparticles were prepared by chemical co-precipitation using FeCl3·6H2O, MnCl2·4H2O and ZnSO4·7H2O as the starting materials. During the co-precipitation, the effects of the ratio of Mn2+ and Zn2+ concentration on the magnetic properties were considered. To prevent the aggregation of nanoparticles, oleic acid was used as surfactant. The obtained nanoparticles were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM) and thermogravimetry (TG).2. The aggregate size was significantly reduced after modification, leading to the high dispersibility of nanoparticles in (TPV). Compared with the bare nanoparticles, the modified nanoparticles are proved to improve the tensile strength and elongation of TPV.