Journal of Materials Science: Materials in Electronics ( IF 2.8 ) Pub Date : 2020-09-16 , DOI: 10.1007/s10854-020-04419-y Hang Liu , Honglong Xing , Ran Shi , Xiaoli Ji
The Al@MnO2 composites were synthesized by flake aluminum powder and potassium permanganate via a facile one-step method. As a multi-band stealth material, the composites have both enhanced microwave absorbing property and low infrared emissivity. We can use XRD, XPS, SEM, and TEM to detect structure and performance, respectively. The microwave absorbing properties and infrared emissivity were investigated by vector network analyzer and dual-band infrared emissometer. It was found that the MnO2 nanoparticles were anchored on the aluminum sheets densely, and the concentration of MnO2 nanoparticles had a certain effect on absorption performance and infrared emissivity. As an absorber, with its polarization effect, resonance effect, and good impedance matching, the composite with the filler loading is 60 wt% can perform excellent microwave absorption performance (Chen et al. in Optik (Stuttg) 172:840–846, 2018). The minimum reflection loss reached − 42.93 dB at 12.72 GHz with a thickness of 1.0 mm, and the bandwidth that exceed − 10 dB ranged from 12.08 GHz to 13.36 GHz (Li et al. in J Colloid Interface Sci 507:131–138, 2017). As an infrared stealth material, the composite exhibits low infrared emissivity in the band range of 8–14 µm, which was attributed to the existence constituent of flake aluminum powder. The infrared emissivity reached 0.55 at the lowest, as well as enlarged with the increase of MnO2 concentration. Therefore, the Al@MnO2 composites could be a potential superior microwave and infrared compatible stealth material.
中文翻译:
微波吸收增强且红外发射率低的Al @ MnO 2的表面合成
片状铝粉和高锰酸钾通过一种简便的一步法合成了Al @ MnO 2复合材料。作为一种多波段隐形材料,复合材料既具有增强的微波吸收性能,又具有低红外发射率。我们可以使用XRD,XPS,SEM和TEM分别检测结构和性能。用矢量网络分析仪和双频红外发射仪研究了微波的吸收特性和红外发射率。发现MnO 2纳米颗粒紧密地锚固在铝板上,并且MnO 2的浓度纳米粒子对吸收性能和红外发射率有一定影响。作为一种吸收剂,其极化效应,共振效应和良好的阻抗匹配性,使其填料负载率为60 wt%,可以表现出出色的微波吸收性能(Chen等人在Optik(Stuttg)172:840–846,2018 )。最小反射损耗在厚度为1.0 mm的12.72 GHz处达到− 42.93 dB,带宽超过− 10 dB的范围在12.08 GHz至13.36 GHz之间(Li等人,J Colloid Interface Sci 507:131–138,2017年) )。作为一种红外隐身材料,复合材料在8-14 µm的波段范围内显示出较低的红外发射率,这归因于片状铝粉的存在成分。红外发射率最低达到0.55,并且随着MnO的增加而增大2浓度。因此,Al @ MnO 2复合材料可能是潜在的优异的微波和红外兼容隐身材料。