Abstract:

In this work, nanometer magnetite (Fe₃O₄) particles were prepared by the chemical coprecipitation method, NH₃·H₂O was chosen as the precipitating agent, and was added dropwise together with the mixed aqueous solution containing ferric and ferrousions to the buffer solution composed of NH₃·H₂O and ammonium nitrate to produce nanometer Fe₃O₄ particles. Some influence factors on the size and characteristic of the product were investigated, and preliminary characterization was also performed by means of TEM, XRD and IR spectrum.

Key words: chemical coprecipitation, magnetite, nanometer, magnetism