Ba₃Co₂Fe₂₄O₄₁(Co₂Z)/polyimide(PI) composites were synthesized via in-situ polymerization process, using the micron-sized Co₂Z particles prepared by the solid-state reaction. X-ray diffractometer (XRD) pattern shows the existence and purity of the aimed phase. Scanning electron microscope (SEM) images show that the Co₂Z particles are uniformly dispersed in the composites. The testing results of dielectric properties of composites reveal that the dielectric constants of the composites increase with the Co₂Z content increasing. The frequency-dependent dielectric loss shows that the dielectric loss of samples has the same trend, and that a peak can be observed at about 10 MHz. The saturation magnetization (Ms) of composites depends on the ferrite content, and the Ms. value can reach 8.9 emu/g when the ferrite content is 40 wt% in Co₂Z/PI composites. Additionally, the coercivity (Hc) of composites show almost no change as the ferrite content increasing, about 100 Oe. The results indicate that the obtained magnetic dielectric composites are new candidates for antenna applications.

中文翻译：

---

具有磁性和介电性能的Ba 3 Co 2 Fe 24 O 41 /聚酰亚胺复合材料

利用固相反应制备的微米级Co ₂ Z颗粒，通过原位聚合工艺合成了Ba ₃ Co ₂ Fe ₂₄ O ₄₁（Co ₂ Z）/聚酰亚胺（PI）复合材料。X射线衍射仪（XRD）图案显示了目标相的存在和纯度。扫描电子显微镜（SEM）图像显示Co ₂ Z颗粒均匀地分散在复合物中。复合材料的介电性能测试结果表明，复合材料的介电常数随Co _2的增加而增加。Z含量增加。随频率变化的介电损耗表明样品的介电损耗具有相同的趋势，并且可以在大约10 MHz处观察到一个峰值。复合材料的饱和磁化强度（Ms）取决于铁素体含量，当Co ₂ Z / PI复合材料中的铁素体含量为40 wt％时，Ms。值可以达到8.9 emu / g 。另外，随着铁素体含量的增加，复合材料的矫顽力（Hc）几乎没有变化，约为100 Oe。结果表明，所获得的磁性介电复合材料是天线应用的新候选者。