Preparation and characterization of barium hexaferrite powders produced by decomposition of organometallic complexes

Barium hexaferrite (BaFe12O19) particles have been prepared by the decomposition of an organometallic salt. The properties of the ferrite particles have been investigated by x-ray diffractometry, Moessbauer spectroscopy, scanning electron microscopy, and magnetic measurements. The size of the particles produced lie between 0.1 and 0.5 μm. To form the hexaferrite the decomposition product must be heated to > 620 degree C. Typical values of the saturation magnetization, coercivity, and remanence ratio of the hexaferrite particles are 333 kA·m-1 (63 emu/g-1), 320 kA·m-1 (4 kOe), and 0.49, respectively