电磁波辅助制备Fe3O4颗粒的研究

摘要

Fe3O4particles were prepared by introducing air into the FeSO4and NaOH mixed solution at 72 ℃ with the assistant of 125 MHz electromagnetic wave irradiation. It was found that the reaction ended at 50 min by analyzing the interval sampled products. The sampled product was characterized by X-ray powder diffraction ( XRD) , scanning electron microscopy ( SEM) and vibration sampling magnetometer ( VSM). The particles synthesized by electromagnetic wave had the uniform sizes with sphericity and belonged to cubic Fe3O4particle. The saturation magnetization was 76 emu/g, the residual magnetization was about 15 emu/g and the coercivity was 100 Oe.%保持FeSO4溶液与NaOH溶液在72 ℃通气的条件下, 并在125 MHz电磁波辅助下制备了Fe3O4颗粒.通过在反应过程中取得样本的分析发现, 反应结束时间为50 min.合成产物通过X射线衍射(XRD)、扫描电子显微镜( SEM)与振动样品磁强计(VSM)检测表明, 电磁波辅助下制得的Fe3O4颗粒的尺寸较均匀, 为球形颗粒, 属于立方晶型.合成的Fe3O4颗粒的饱和磁化强度为76 emu/g, 剩磁约为15 emu/g, 矫顽力为100 Oe.