NiFe2O4/T-ZnOW复合材料的制备及磁性能

NiFe₂O₄/T-ZnO_W复合材料的制备及磁性能

摘要: 采用化学镀法在四角氧化锌晶须(T-ZnO_W)表面包覆NiFe₂O₄镀层, 制备了NiFe₂O₄/T-ZnO_W复合材料。利用X射线衍射仪、扫描电镜、能谱分析仪、振动样品磁强计对镀覆前后T-ZnO_W的结构、形貌等进行了表征。结果表明, 化学镀覆后, 在T-ZnO_W表面包覆了致密的尖晶石型NiFe₂O₄镀层, T-ZnO_W针尖部位生成的镀层厚度比根部薄。NiFe₂O₄/T-ZnO_W复合材料具有软磁特性。随着退火温度的升高, 复合材料的饱和磁化强度和矫顽力逐渐升高, 在800℃达到最高。

Abstract: NiFe₂O₄/T-ZnO_W composites were prepaired by encapsulating T-ZnO_W with an NiFe₂O₄film through ferrite electrodeless plating. The composites were characterized by X-ray analyses (XRD), scanning electron microscopy (SEM) and energy dispersion spectroscopy (EDS). The magnetic properties were measured by vibrating sample magnetometer (VSM). The results indicate that the surface of T-ZnO_W is covered with a compact layer of NiFe₂O₄, and the coating on the needlepoint is thinner than that on the root of T-ZnO_W The composites exhibit excellent ferromagnetic behavior. The saturation magnetization and coercive force increase with the annealing temperature, and reach the peak at 800℃.