Abstract We present the design of novel, lightweight, broadband microwave absorbers based on polyaniline/Mn 0.1 Ni 0.45 Zn 0.45 Fe 2 O 4 (PANI/MnNiZn ferrite) nanocomposites. The ferrite is synthesized by sol-gel technique. Then, the polymer is deposited by in-situ chemical oxidative polymerization. The structural and morphological characterizations of the composites are investigated by SEM, XRD, FT-IR and UV– vis spectroscopy. The functional characterization is performed by measuring the dc-conductivity and microwave absorption characteristics in the X-band. The absorbers exhibit broad bandwidths under −10 dB ranging from 2.60 to 3.74 GHz and low surface density ranging from 2.5 to 3.1 kg/m 2 . The absorber of 3.74 GHz bandwidth has a minimum reflection loss of −31.32 dB at 11.13 GHz with a matching thickness of 3 mm and a low loading in paraffin of only 25% w/w.

中文翻译：

---

基于（聚苯胺/MnNiZn铁氧体）纳米复合材料的X波段轻质宽带微波吸收体的设计

摘要 我们提出了基于聚苯胺/Mn 0.1 Ni 0.45 Zn 0.45 Fe 2 O 4（PANI/MnNiZn 铁氧体）纳米复合材料的新型轻质宽带微波吸收剂的设计。铁氧体是通过溶胶-凝胶技术合成的。然后，通过原位化学氧化聚合沉积聚合物。通过SEM、XRD、FT-IR和UV-vis光谱研究了复合材料的结构和形态特征。通过测量 X 波段中的直流电导率和微波吸收特性来进行功能表征。吸收体表现出-10 dB 以下的宽带宽，范围为 2.60 至 3.74 GHz，低表面密度范围为 2.5 至 3.1 kg/m 2 。3.74 GHz 带宽的吸收器在 11 处具有 -31.32 dB 的最小反射损耗。