College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
J Colloid Interface Sci. 2023 Jul;641:414-427. doi: 10.1016/j.jcis.2023.03.020. Epub 2023 Mar 13.
Alongside the rapid development of detection systems and improved detection accuracy, infrared/radar-compatible stealth materials have become the emphasis of current stealth technology research. Versatile flower-like Ni particles/silicon carbide nanowires (SiC NWs) composites for infrared radar stealth compatibility have been successfully prepared. Due to its special microstructure in combination with the multiple loss mechanisms of dielectric and magnetic, the minimum reflection loss (RL) achievable with the paraffin matrix mixture is -49.26 dB at a composite content of 50 wt%, which has a thickness of 1.9 mm and an effective absorption bandwidth (EAB) of 4.85 GHz. By increasing the absorbent content to 60 wt%, the EAB in the Ku band can attain 5.0 GHz at 1.8 mm thickness. Petal-shaped Ni particles are introduced to improve the impedance matching characteristics, increase interfacial polarisation and multiple scattering of electromagnetic (EM) wave, and enhance the microwave absorption properties. Simultaneously, the pure SiC NWs material can protect against infrared radiation emitted from the hand for more than 15 min, and the infrared (IR) reflectivity is improved in all three bands after the composite metal Ni particles. A novel formulation guide for the design of versatile and high-performance EM wave absorbing and infrared stealth materials is provided by this work.
伴随着检测系统的快速发展和检测精度的提高，红外/雷达兼容的隐形材料已经成为当前隐形技术研究的重点。本文成功制备了多功能花状 Ni 粒子/碳化硅纳米线（SiC NWs）复合材料，实现了对红外雷达的兼容隐形。由于其特殊的微观结构，结合介电损耗和磁损耗的多重损耗机制，在石蜡基混合物中，当复合材料含量为 50wt%、厚度为 1.9mm 时，可实现最小反射损耗（RL）为-49.26dB，有效吸收带宽（EAB）为 4.85GHz。通过增加吸收剂含量至 60wt%，在 1.8mm 厚度下，Ku 波段的 EAB 可以达到 5.0GHz。引入花瓣状 Ni 粒子可以改善阻抗匹配特性，增加界面极化和电磁波的多次散射，增强微波吸收性能。同时，纯 SiC NWs 材料可以防止手发出的红外辐射超过 15 分钟，并且在复合金属 Ni 粒子之后，在三个波段都提高了红外（IR）反射率。这项工作为设计多功能、高性能的电磁波吸收和红外隐形材料提供了新的配方指导。
