Liu Juncen, Yang Zhihong, Li Meng, Yang Lieji, Xue Tong, Xu Guoyue
College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People's Republic of China.
School of Materials Science and Engineering, North Minzu University, Yinchuan 750021, People's Republic of China.
Nanotechnology. 2021 Jan 1;32(1):015707. doi: 10.1088/1361-6528/abb7b3.
In order to overcome the drawbacks of FeO composite samples and greatly increase their performance in microwave absorption, magnetic FeO spindles coated with dielectric SnO nanorods and MnO nanoflakes have been successfully synthesized by a four-step simple hydrothermal route. This rationally designed magneto-dielectric ternary nanocomposite will introduce multiple reflection and conductive losses caused by its special multilayer structure and the effective complementarity of dielectric loss and magnetic loss. Therefore, its absorbing performance can be greatly improved. It is notable that the as-prepared FeO@SnO@MnO nanocomposites show a minimum reflection loss value of -50.40 dB at 17.92 GHz at a thickness of 3.9 mm and the absorption bandwidth ranges from 3.62 to 12.08 GHz. The as-prepared FeO@SnO@MnO ternary nanocomposite is expected to be a potential candidate for high-performance microwave-absorbing materials with intensive electromagnetic wave absorption and wide effective absorbing bandwidth.
为了克服FeO复合样品的缺点并大幅提高其微波吸收性能，通过一种简单的四步水热法成功合成了包覆有介电SnO纳米棒和MnO纳米片的磁性FeO纺锤体。这种经过合理设计的磁电三元纳米复合材料将因其特殊的多层结构以及介电损耗和磁损耗的有效互补而引入多重反射和传导损耗。因此，其吸收性能可得到极大提高。值得注意的是，所制备的FeO@SnO@MnO纳米复合材料在厚度为3.9 mm时，于17.92 GHz处显示出-50.40 dB的最小反射损耗值，吸收带宽范围为3.62至12.08 GHz。所制备的FeO@SnO@MnO三元纳米复合材料有望成为具有强电磁波吸收和宽有效吸收带宽的高性能微波吸收材料的潜在候选者。
