CuO掺杂Ni0.4Zn0.6Fe2O4铁氧体的组织与性能探讨

采用传统球磨法制备了Ni0.4-xCu_xZn0.6Fe₂O₄（x＝0，0.12，0.20，0.28）铁氧体，并通过扫描电镜（SEM）、X-ray衍射（XRD）、综合热分析（TG-DSC）和振动样品磁强计（VSM）等手段研究掺杂CuO对Ni-Zn铁氧体的显微组织、相组成和磁性能。结果表明，随着CuO含量的增加，第二相Ni-Cu-Zn相生成，且 Ni-Cu-Zn铁氧体衍射峰强度逐渐增强；从显微组织形貌和能谱可以看出，Cu ^2＋参与了铁氧体的反应，CuO含量增加得越多，样品烧结性能越好，并促使Ni-Cu-Zn铁氧体的晶化温度降低；磁滞回线显示了Ni0.4-xCu_xZn0.6Fe₂O₄（x＝0，0.12，0.20，0.28）铁氧体的软磁特性，CuO原子分数x为0.2时的铁氧体的饱和磁化强度（Ms）最高，且具有较低的矫顽力（Hc）。

Discussion about CuO doping on microstructure and properties of Ni 0.4 Zn 0.6 Fe 2 O 4 ferrite

Ni _0.4-x Cu _x Zn _0.6 Fe ₂ O ₄（x＝0， 0.12， 0.20， 0.28） ferrite was prepared by the traditional ball milling method. The microstructure， phase composition and magnetic properties of Ni-Zn ferrite with CuO doping on were investigated by scanning electron microscope （SEM）， X-ray diffraction （XRD）， comprehensive thermal analysis （TG-DSC） and vibrating sample magnetometer （VSM）. The results showed that with the increase of CuO content， the second phase of Ni-Cu-Zn ferrite was formed， and the diffraction peak intensity of Ni-Cu-Zn ferrite gradually increased. It could be seen from the microstructure and energy spectrum that Cu ^2＋ participated in the reaction of ferrite. The increase of CuO content improved the sintering performance of the sample， and reduced the crystallization temperature of Ni-Cu-Zn ferrite. The hysteresis loop showed soft magnetic properties of Ni _{0.4- x} Cu _x Zn _0.6 Fe ₂ O ₄ （x＝0， 0.12， 0.20， 0.28）. When the CuO content x was 0.2， the saturation magnetization （M _s） of ferrite was highest. Meanwhile， the coercive force （H _c） was relatively low.