Green Michael, Liu Zhanqiang, Xiang Peng, Liu Yan, Zhou Minjie, Tan Xinyu, Huang Fuqiang, Liu Lei, Chen Xiaobo
1Department of Chemistry, University of Missouri, Kansas City, MO 64110 USA.
2State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China.
Light Sci Appl. 2018 Nov 14;7:87. doi: 10.1038/s41377-018-0088-8. eCollection 2018.
Although many materials have been studied for the purpose of microwave absorption, SiO has never been reported as a good candidate. In this study, we present for the first time that doped, microwave conductive SiO nanoparticles can possess an excellent microwave absorbing performance. A large microwave reflection loss (RL) of -55.09 dB can be obtained. The large microwave absorption originates mainly from electrical relaxation rather than the magnetic relaxation of the incoming microwave field. The electrical relaxation is attributed to a large electrical conductivity that is enabled by the incorporation of heterogeneous (N, C and Cl) atoms. The removal of the magnetic susceptibility only results in a negligible influence of the microwave absorption. In contrast, the removal of the heterogeneous atoms leads to a large decrease in the electrical conductivity and microwave absorption performance. Meanwhile, the microwave absorption characteristics can be largely adjusted with a change of the thickness, which provides large flexibility for various microwave absorption applications.
尽管为了微波吸收目的已经研究了许多材料，但SiO从未被报道为一种良好的候选材料。在本研究中，我们首次提出掺杂的微波导电SiO纳米颗粒可以具有优异的微波吸收性能。可以获得-55.09dB的大微波反射损耗（RL）。大的微波吸收主要源于电弛豫，而不是入射微波场的磁弛豫。电弛豫归因于通过掺入异质（N、C和Cl）原子而实现的大电导率。去除磁化率只会对微波吸收产生可忽略不计的影响。相反，去除异质原子会导致电导率和微波吸收性能大幅下降。同时，微波吸收特性可以随着厚度的变化而在很大程度上进行调整，这为各种微波吸收应用提供了很大的灵活性。
