Synthesis and properties of composite magnetic material SrCoxFe12-xO19 (x = 0–0.3)

The composites SrCoxFe12-xO19(x = 0–0.3) were prepared by coprecipitation high-temperature sintering method with low-cost reagents. The structures and properties of SrCoxFe12-xO19 were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM) techniques. There were hard magnetic phase (SrFe12O19) and soft magnetic phase (CoFe2O4) in SrCoxFe12-xO19(x = 0.05–0.3). The saturation magnetization of SrCoxFe12-xO19(x = 0.3) was larger than those of SrCoxFe12-xO19(x ≤ 0.2). The synthesized composites were fit to act as good magnetic substrate of catalysts.