ABSTRACT

In this study, radar absorbing structures (RAS) containing MnZn ferrite/Polyaniline (Pani) coated multi-walled carbon nanotubes (PCNTs) were fabricated to observe their microwave absorption behaviour in X-band frequency range. The ferrite nano particles were prepared by sol–gel auto combustion method. The prepared nano ferrite powder was characterised using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and vibrating sample magnetometer (VSM). RAS filled with nano ferrite particles and PCNTs in different concentrations were fabricated to investigate their microwave absorption behaviour using a vector network analyzer (VNA) and later reflection loss (RL) is estimated. The minimum RL loss estimated for double-layered RAS are found to be −29.06 dB at 10.8 GHz for ferrite fixed samples and −33.07 dB at 9.6 GHz for PCNT fixed samples. Further, their mechanical behaviour is examined.

摘要

在这项研究中，制造了包含 MnZn 铁氧体/聚苯胺 (Pani) 涂层的多壁碳纳米管 (PCNT) 的雷达吸收结构 (RAS)，以观察它们在 X 波段频率范围内的微波吸收行为。采用溶胶-凝胶自燃法制备铁氧体纳米颗粒。使用X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、热重分析(TGA)和振动样品磁强计(VSM)对制备的纳米铁氧体粉末进行表征。制造了填充有不同浓度的纳米铁氧体颗粒和 PCNT 的 RAS，以使用矢量网络分析仪 (VNA) 研究它们的微波吸收行为，并估计后期反射损耗 (RL)。对于铁氧体固定样品，双层 RAS 估计的最小 RL 损耗在 10.8 GHz 时为 -29.06 dB，为 -33。PCNT 固定样本在 9.6 GHz 时为 07 dB。此外，检查了它们的机械性能。