Abstract In this paper, Co-doped ZnO nanoparticle and nanofiber are prepared by electrospinning method. The results show that Co-doped ZnO nanofiber performs bead-like fibrous shape and exhibits ferromagnetic properties. The dielectric loss and magnetic loss properties of Co-doped ZnO nanofiber are much better than those of Co-doped ZnO nanoparticle due to the improvement of dipole polarization, interfacial polarization and shape anisotropy. The absorptivity of Co-doped ZnO nanofiber can reach 70% in the frequency range of 5.3–18 GHz when the coating thickness is 1.5–4.0 mm. It is demonstrated that the bead-like fibrous shape is beneficial to optimize electromagnetic loss and microwave absorption properties of Co-doped ZnO.

中文翻译：

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Co掺杂ZnON纳米纤维的独特电磁损耗特性

摘要 本文采用静电纺丝法制备了Co掺杂ZnO纳米粒子和纳米纤维。结果表明，Co掺杂的ZnO纳米纤维呈珠状纤维状并表现出铁磁性能。由于偶极极化、界面极化和形状各向异性的改善，Co掺杂的ZnO纳米纤维的介电损耗和磁损耗性能远优于Co掺杂的ZnO纳米颗粒。当涂层厚度为 1.5-4.0 mm 时，Co 掺杂的 ZnO 纳米纤维在 5.3-18 GHz 的频率范围内的吸收率可以达到 70%。结果表明，珠状纤维形状有利于优化 Co 掺杂 ZnO 的电磁损耗和微波吸收性能。