Effect of Different Sintering Temperatures on Structural and Magnetic Properties of Zn–Co Ferrite Nanoparticles

In order to investigate the effect of sintering temperature on the structure and properties of Zn–Co ferrite, the Zn 0.5 Co 0.5 Fe 2 O 4 ferrite powder with spinel structured was prepared by sol–gel method at different sintering temperatures. X-ray diffraction spectroscopy (XRD), Fourier transformed infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and vibrating sample magnetometer (VSM) were used to study the structural and magnetic properties of the prepared samples. It was found that the sintering temperature has a significant influence on the structure and magnetic properties of the Zn–Co ferrite. As the sintering temperature increases from 600 to 1000 °C, the crystallinity and crystallite size of the samples increase significantly, but the coercivity, remanence, and squareness decrease and the saturation magnetization increases first and then decreases. Compared with other samples, the sample sintered at 900 °C has the highest bulk density (3715.42 kg/m 3 ) and saturation magnetization (68.17 emu/g). At the same time, it also has a small coercivity, remanence, anisotropy constant, and porosity. The sample obtained by sintering at 800 °C has a good magnetic susceptibility (dM/dH) at H m . This work provides basic research data for the preparation of Zn–Co ferrite with better magnetic properties and has certain reference value.