Abstract The microwave absorber composites as the combinations of MWCNTs, Ba-hexaferrite and Co/C particles were prepared. For Co/C synthesis, firstly, the Co-based MOF (ZIF-67) was synthesized through the solvothermal method and secondly, the ZIF-67calcined at 500 °C to obtain Co/C particles. In addition, the BaCoTiFe10O19 powder was synthesized via the hydrothermal method. The structural and morphological analysis were carried out by X-ray diffractometer (XRD), transmission electron microscope (TEM) and scanning electron microscope (SEM). The permeability and permittivity values of composites were investigated in the range of X band frequency (8.2–12.4 GHz). The electromagnetic (EM) wave absorption performance of composites was evaluated by using values of the permeability and permittivity values. It was demonstrated that the EM absorption performance of composites was enhanced by the loading MWCNTs. The combination of MWCNT with Ba-M and Co/C increased the magnetic and dielectric losses due to the enhance in both polarization and surface area. The minimum reflection loss (RL) of CBM.70.29.1 reached -34 dB with effective bandwidth (

中文翻译：

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MWCNTs对Co/C和Ba-Hexaferrite杂化纳米复合材料微波吸收性能的影响

摘要 制备了多壁碳纳米管、Ba-六铁氧体和Co/C颗粒组合的吸波复合材料。对于Co/C合成，首先通过溶剂热法合成Co基MOF（ZIF-67），然后将ZIF-67在500℃下煅烧得到Co/C颗粒。此外，BaCoTiFe10O19 粉末是通过水热法合成的。通过X射线衍射仪(XRD)、透射电子显微镜(TEM)和扫描电子显微镜(SEM)进行结构和形态分析。在 X 波段频率 (8.2–12.4 GHz) 范围内研究了复合材料的磁导率和介电常数值。通过使用磁导率和介电常数值来评估复合材料的电磁 (EM) 波吸收性能。结果表明，加载多壁碳纳米管可以提高复合材料的电磁吸收性能。由于极化和表面积的增强，MWCNT 与 Ba-M 和 Co/C 的组合增加了磁损耗和介电损耗。CBM.70.29.1 的最小反射损耗 (RL) 达到 -34 dB，有效带宽 (