合成条件对纳米锌铁氧体形貌与性能的影响

采用多元醇法制备ZnFe_2O_4纳米颗粒,研究回流时间、升温速率和回流温度对产物尺寸、形貌和磁性能的影响。通过X射线衍射仪(XRD),透射电子显微镜(TEM),傅里叶红外光谱和振动样品磁强计对样品的结构、形貌和磁性能进行表征。结果表明:制备的ZnFe_2O_4纳米颗粒分散性较好,尺寸较均一。随着回流时间的延长和回流温度的升高,ZnFe_2O_4颗粒粒径增大。回流温度为270℃时,制备的ZnFe_2O_4饱和磁化强度为35.09A·m~2/kg,剩磁较小,矫顽力为4.2kA/m,表现出亚铁磁性。

Effect of Synthesis Conditions on the Morphology and Properties of Nano Zn Ferrites

ZnFe2O4 nanoparticles were synthesized by polyol process. The influence of reaction conditions, such as the refluxing time, heating rates and refluxing temperature on the size, morphology and magnetic properties was investigated. The structure, morphology and magnetic properties of resultant products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), fourier transform infrared (FTIR) and vector network analyzer. The results show that the obtained ZnFe2O4 nanoparticles have uniform size and good dispersibility. The particle size increases with the increase of the reflux time and the reflux temperature. ZnFe2O4 nano ferrites synthesized at the refluxing temperature of 270℃ have maximum saturation magnetization of 35. 09A · m2/kg with less remanence and the coercive force is 4. 2kA/m. ZnFe2O4 nanoferrites show a typical ferrimagnetic behavior.