Polyaniline PANI/(SrFe₁₂O₁₉)_(1-x)/(Co_0.8Ni_0.2Fe₂O₄)_(x) (x = 0.2, 0.4, 0.6, 0.8) composites were prepared via the in situ polymerization process. The structure, morphology and electromagnetic absorption properties of samples were studied. XRD (x-ray diffractometer), FESEM (field emission scanning electron microscopy), and FTIR (field transform infrared) analyses demonstrated that SrFe₁₂O₁₉/Zn_0.4Co_0.2Ni_0.4Fe₂O₄ ferrite particles were covered by PANI coating. VSM measurement revealed by adding non-magnetic polymer (PANI), magnetic features of aimed composites declined. The electromagnetic absorption of synthesized samples was measured by VNA. In the frequency range of 8.2–12.4 GHz (X-Band), the reflection loss improved to − 28.5 dB from − 2.93 dB composites of PANI/(SrFe₁₂O₁₉)_0.2/(Zn_0.4Co_0.2Ni_0.4Fe₂O₄)_0.8 in comparison to (SrFe₁₂O₁₉)_0.2/(Zn_0.4Co_0.2Ni_0.4Fe₂O₄)_0.8. Due to the perfect impedance matching between PANI as the dielectric part, and ferrites in the case of the magnetic part, the reflection loss decreased in PANI/(SrFe₁₂O₁₉)_(1-x)/(Co_0.8Ni_0.2Fe₂O₄)_(x) composites. The minimum reflection loss of the PANI/SrFe₁₂O₁₉/Zn_0.4Co_0.2Ni_0.4Fe₂O₄ composites was − 28.6 dB at the frequency of 11.5 GHz.

Graphic Abstract

中文翻译：

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聚苯胺对SrFe 12 O 19 / Zn 0.4 Co 0.2 Ni 0.4 Fe 2 O 4铁氧体纳米复合材料中电磁和微波吸收性能的影响

通过原位聚合方法制备了聚苯胺PANI /（SrFe ₁₂ O ₁₉）_（1-x） /（Co _0.8 Ni _0.2 Fe ₂ O ₄）_{（x ）}（x = 0.2、0.4、0.6、0.8 ）复合材料。研究了样品的结构，形态和电磁吸收性能。XRD（X射线衍射仪），FESEM（场发射扫描电子显微镜）和FTIR（场变换红外）分析表明，SrFe ₁₂ O ₁₉ / Zn _0.4 Co _0.2 Ni _0.4 Fe ₂ O ₄铁氧体颗粒被PANI涂层覆盖。通过添加非磁性聚合物（PANI）揭示了VSM测量结果，目标复合材料的磁性特征有所下降。合成样品的电磁吸收通过VNA测量。在8.2–12.4 GHz（X波段）的频率范围内，反射损耗从-2.93 dB的PANI /（SrFe ₁₂ O ₁₉）_0.2 /（Zn _0.4 Co _0.2 Ni _0.4 Fe ₂ O ₄）复合材料改善为-28.5 dB ）_0.8与（SrFe ₁₂ O ₁₉）_0.2 /（Zn _0.4 Co _0.2 Ni _0.4 Fe₂ O ₄）_0.8。由于作为电介质部分的PANI与在磁性部分的情况下的铁氧体之间具有完美的阻抗匹配，因此PANI /（SrFe ₁₂ O ₁₉）_（1-x） /（Co _0.8 Ni _0.2 Fe ₂ O _）的反射损耗降低₄）_{（x ）}复合材料。PANI / SrFe ₁₂ O ₁₉ / Zn _0.4 Co _0.2 Ni _0.4 Fe ₂ O ₄复合材料在11.5 GHz频率下的最小反射损耗为-28.6 dB。

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