Enhanced Electromagnetic Wave Absorption Properties of Ultrathin MnO<sub>2</sub> Nanosheet-Decorated Spherical Flower-Shaped Carbonyl Iron Powder
Zhengwei Qu,
Yi Wang,
Pingan Yang,
Wei Zheng,
Nan Li,
Jingying Bai,
Youwei Zhang,
Kailin Li,
Dashuang Wang,
Zhaohui Liu,
Kexin Yao,
Rui Li,
Yuxin Zhang
Affiliations
Zhengwei Qu
School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Yi Wang
College of Material Science and Engineering, Chongqing University, Chongqing 400044, China
Pingan Yang
School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Wei Zheng
Institute of Space Antenna, China Academy of Space Technology (Xi’an), Xi’an 710100, China
Nan Li
Aerospace Institute of Advanced Materials & Processing Technology, Beijing 100074, China
Jingying Bai
Beijing Spacecraft, China Academy of Space Technology, Beijing 100194, China
Youwei Zhang
Beijing Spacecraft, China Academy of Space Technology, Beijing 100194, China
Kailin Li
College of Material Science and Engineering, Chongqing University, Chongqing 400044, China
Dashuang Wang
College of Material Science and Engineering, Chongqing University, Chongqing 400044, China
Zhaohui Liu
Multi-Scale Porous Materials Center, Institute of Advanced Interdisciplinary Studies & School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400045, China
Kexin Yao
Multi-Scale Porous Materials Center, Institute of Advanced Interdisciplinary Studies & School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400045, China
Rui Li
School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Yuxin Zhang
College of Material Science and Engineering, Chongqing University, Chongqing 400044, China
In this work, spherical flower-shaped composite carbonyl iron powder@MnO2 (CIP@MnO2) with CIP as the core and ultrathin MnO2 nanosheets as the shell was successfully prepared by a simple redox reaction to improve oxidation resistance and electromagnetic wave absorption properties. The microwave-absorbing properties of CIP@MnO2 composites with different filling ratios (mass fractions of 20%, 40%, and 60% after mixing with paraffin) were tested and analyzed. The experimental results show that compared with pure CIP, the CIP@MnO2 composites have smaller minimum reflection loss and a wider effective absorption bandwidth than CIP (RL 2 composites is attributed to the combined effect of multiple beneficial components and the electromagnetic attenuation ability generated by the special spherical flower-like structure. Furthermore, this spherical flower-like core–shell shape aids in the creation of discontinuous networks, which improve microwave incidence dispersion, polarize more interfacial charges, and allow electromagnetic wave absorption. In theory, this research could lead to a simple and efficient process for producing spherical flower-shaped CIP@MnO2 composites with high absorption, a wide band, and oxidation resistance for a wide range of applications.
