Structural and Magnetic Properties of Different Temperature Sintering La-Substituted Barium Ferrite

The Ba1-xLaxFe12O19 (0.0≤x≤0.6) ferrite materials were prepared by the standard solid state reaction technique method and sintered at 920 °C with 4 wt% Bi2O3 and at 1150 °C without Bi2O3 in air. The influence of La3+ contents on the microstructure, density, and magnetic properties were studied. The XRD results showed essentially single phase spinel structure. The SEM images of the samples had no obvious relationship with the substituting value. Saturation magnetization continuously decreased from 59.37 emu/g to 57.93 emu/g with sintering temperature from 1150 °C to 920 °C. However, coercive force reached the value of 4547.0 Oe when x=0.6 at 920 °C. The density of the samples also decreased monotonously with increasing x value.