Heat treatment effects on Fe_3O_4 nanoparticles structure and magnetic properties prepared by carbothermal reduction

摘要

Fe_3O_4 nanoparticles were prepared by carbothermal reduction method using glucose as carbon source Heating temperature and holding time effects on crystalline phase composition and magnetic properties of Fe_3O_4 nanoparticles were investigated by X-ray diffraction, field-emission scanning electron microscopy and vibrating sample magnetometer. Pure Fe_3O_4 nanoparticles with an average crystallite size of 48 nm was obtained at higher heating temperature of 650°C and shorter holding time of 0.5 h, or at lower heating temperature of 450 °C and longer holding time of more than 6 h.