Gao Ka, Zhao Junliang, Bai Zhongyi, Song Wenzheng, Zhang Rui
School of Materials Science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450015, China.
Henan Key Laboratory of Aeronautical Material and Application Technology, Zhengzhou 450015, China.
Materials (Basel). 2019 Oct 6;12(19):3259. doi: 10.3390/ma12193259.
In this paper, the flower-like FeCo/ZnO composites were successfully firstly prepared by a two-step method, and their microstructures and microwave absorbing properties were characterized. The results show that with an increase of temperature, the content of ZnO loaded on a FeCo/ZnO composite surface was increased. The optimal reflection loss (RL) value can be reached around -53.81 dB at 9.8 GHz, which is obviously superior to results of previous studies and reports, and its effective bandwidth (RL < -10 dB) is 3.8 GHz in the frequency range of 8.7-11.8 GHz with a matching thickness of 1.9 mm. We considered that a large number of lamellar and rod-like ZnO loaded on nano-FeCo single-phase solid solution by two-step method can significantly improve the electromagnetic wave absorption properties.
本文首次采用两步法成功制备了花状FeCo/ZnO复合材料，并对其微观结构和吸波性能进行了表征。结果表明，随着温度的升高，负载在FeCo/ZnO复合材料表面的ZnO含量增加。在9.8 GHz时，最佳反射损耗（RL）值可达-53.81 dB左右，明显优于以往的研究和报道结果，在8.7-11.8 GHz频率范围内，其有效带宽（RL < -10 dB）为3.8 GHz，匹配厚度为1.9 mm。我们认为，通过两步法负载在纳米FeCo单相固溶体上的大量片状和棒状ZnO可显著提高电磁波吸收性能。
