Preparation and characterizations of ultrafine hexaganoal ferrite Co2Z powders

Ultrafine hexagnoal ferrite Ba3Co2Fe24O41(Co2Z) powders were prepared by a citrate precursor method. Single Z-type phase was found to form at a relatively low temperature of 1150 °C, and kept stable between 1150 and 1270 °C. X-ray diffraction (XRD), TG, transmission electron microscopy (TEM), scanning electron microscopy (SEM), VSM, X-ray photoelectron spectroscopy (XPS) and XRF were used to characterize the powders. Co2Z ceramics with excellent magnetic properties can be obtained after sintering at 1150–1200 °C. Microstructures as well as magnetic properties of the sintered bodies were investigated.