Optimization Fe₃O₄ Nanosized Powder Preparing Technology

Nanosized Fe3O4 powders were prepared by means of precipitation method.Factors influencing powder size and nano-magnetic pellet saturation magnetization were studied through orthogonal experiment design technology and principal factor analysis design technology.Particle size and saturation magnetization were characterized through TEM and VSM.The properties of powders were affected by many factors,such as NaOH solution pouring speed,time of keeping temperature after pouring,C18H33NaO2 solution pouring speed,reaction temperature and heating temperature of C18H33NaO2 solution.Magnetic powders that can meet the requirements of magnetic sealing fluid have been made up.