水热法掺杂的Gd+3对NiGdx Fe2-x O4铁氧体磁性和形貌的影响∗

摘要

本文以硝酸镍[Ni(NO3)2·6H2O]，硝酸铁[Fe(NO3)3·9H2O]，硝酸钆[Gd(NO3)3·6H2O]，氢氧化钠(NaOH)作为原料，采用水热法制备镍铁氧体NiGdxFe2−xO4（x=0，0.02，0.04，0.06，0.1)纳米粉体及研究了稀土掺杂对镍铁氧体磁性能的影响．利用X射线衍射仪（XRD），X射线能谱（EDS）来确定成分，通过振动样品磁强计（VSM）测试样品的磁性能，通过透射电镜（TEM）表征样品形貌．结果表明：随着掺杂量的增加颗粒的平均尺寸逐渐变小，并且样品的饱和磁化强度和矫顽力也减少．%In this paper, nickel nitrate [Ni(NO3)2·6H2O], iron nitrate [Fe(NO3)3·9H2O] nitrate gadolinium [Gd(NO3)3·6H2O], sodium hydroxide (NaOH) as a raw materials, Gadolinium ferrite prepared by hydrother-mal NiGdxFe2−xO4 (x=0, 0.02, 0.04, 0.06, 0.1) nanoparticles and study the effects of re doping on properties of nickel ferrite.Using X-ray diffraction (XRD), X-ray spectroscopy (EDS) to determine the composition, by vibrating sample magnetometer (VSM) and transmission electron microscope (TEM) characterization of morphology. Results indicate that: With the increase in doping by particles of average size becomes smaller, and samples of saturation magnetization and coercivity of particles decreased average size smaller.