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用聚丙烯酰胺凝胶法制备纳米Co0.5Zn0.5Fe2O4铁氧体,再用原位聚合法制备聚吡咯-钴锌铁氧体(PPy-Co0.5Zn0.5Fe2O4)复合材料。使用X射线衍射仪(XRD)和扫描电子显微镜(SEM)表征了复合材料的结构和形貌,用振动样品磁强计(VSM)和矢量网络分析仪测试了复合材料的磁性能和介电性能。结果表明:样品为纯PPy和PPy-Co0.5Zn0.5Fe2O4,平均粒径分别约为200 nm和180 nm;Co0.5Zn0.5Fe2O4的磁化强度(Ms)和剩余磁化强度(Mr)分别为65.95 emu/g和15.44 emu/g,均大于PPyCo0.5Zn0.5Fe2O4,但矫顽力(Hc)为153.51 Oe,小于PPy-Co0.5Zn0.5Fe2O4;PPy的介电损耗(tanε=ε’’/ε’)大于PPy-Co0.5Zn0.5Fe2O4,反射损耗小于PPy-Co0.5Zn0.5Fe2O4,这是Co0.5Zn0.5Fe2O4的引入所致;在频率为15.2 GHz处,PPy-Co0.5Zn0.5Fe2O4复合材料的反射损耗达到最大值-16.4 dB,频带宽为2.5 GHz。
Preparation of nano-Co0.5Zn0.5Fe2O4 ferrite by polyacrylamide gel method, and then PPy-Co0.5Zn0.5Fe2O4 composites were prepared by in-situ polymerization. The structure and morphology of the composites were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The magnetic and dielectric properties of the composites were tested by vibrating sample magnetometer (VSM) and vector network analyzer . The results show that the samples are pure PPy and PPy-Co0.5Zn0.5Fe2O4 with average particle diameters of about 200 nm and 180 nm, respectively. The Ms and remanent magnetization (Ms) of Co0.5Zn0.5Fe2O4 are 65.95 emu / g and 15.44 emu / g, both of which are larger than that of PPyCo0.5Zn0.5Fe2O4, but the coercivity (Hc) is 153.51 Oe and less than that of PPy-Co0.5Zn0.5Fe2O4. The dielectric loss of PPy (tanε = ε "/ ε ’ ) Is larger than that of PPy-Co0.5Zn0.5Fe2O4, the reflection loss is less than that of PPy-Co0.5Zn0.5Fe2O4, which is caused by the introduction of Co0.5Zn0.5Fe2O4. At the frequency of 15.2 GHz, the PPy-Co0.5Zn0.5Fe2O4 composites The maximum return loss is -16.4 dB and the bandwidth is 2.5 GHz.