Effect of sintering temperature on magnetoelectric properties of barium ferrite ceramics

As a new functional material, multiferroic materials have attracted much attention in recent years. In this paper, BaFe12O19 (BaM) ceramics were prepared by the sol-gel method sintered at different temperatures. The effect of sintering temperature on microstructure, surface morphology, dielectric properties, ferroelectric properties and magnetic properties of BaM ceramics were systematically studied. XRD results show that the main diffraction peaks are attributed to BaM ceramics. SEM results show that the grain size of ceramics increases from 0.82 to 1.15 mu m with the sintering temperature increase from 1150 to 1300 degrees C. At room temperature, when the sintering temperature is 1150 degrees C, the residual polarization, saturation magnetization and residual magnetization of ceramics reach the maximum, which are 0.064 mu C/cm(2), 67.145 emu/g, 34.722 emu/g, respectively. The changes of dielectric and ferroelectric properties under applied magnetic field indicate that BaM ceramics have certain magnetoelectric response, which provides a new direction for the development and application of BaM devices.