Micro-structures and magnetic properties of Mg-Al substituted in barium hexa-ferrite prepared by co-precipitation method

Abstract

Abstract In this study, Mg-Al substituted barium hexa-ferrite of BaFe12-2xMgxAlxO19 (x=0-0.2) materials using co-precipitation method at a calcination temperature of 1200°C for 2 hours were carried out. The precursor concentrations of the mixture were varied to identify the optimum sample. The final powder was characterized by using XRD, FE-SEM, and VSM. The XRD shows that the Mg-Al substitution was not change the micro-structures of barium hexa-ferrite. FE-SEM observation was carried out on the surface of hexagonal shape of barium hexa-ferrite. The magnetic properties shows that the decreases saturation (Ms), remanence (Mr) and coercivity (Hc). The optimum condition was obtained on x=0.2 with Ms=29.28 emu/g, Mr=15.33 emu/g, Hc=1259 Oe.