Dielectric loss and electromagnetic absorption performance study of 1T/2H-MoS2/Mo2S3 nanocomposites with different ratios |
| |
Institution: | 1. Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China;2. Key Laboratory of Advanced Functional Materials and Devices of Anhui Province, School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China |
| |
Abstract: | High dielectric loss materials have an important application in electromagnetic (EM) absorption fields. In this paper, the ternary nanocomposites: 1T/2H-MoS2/Mo2S3 with heterogeneous interfaces are synthesized by hydrothermal method. XRD, XPS, FTIR, SEM, and TEM measurements are applied to study the structure, morphology, and composition. The frequency spectra of complex permittivity (εr-f) are measured in 2–18 GHz by vector network analyzer. The results show that the nanocomposites have higher dielectric loss angle tangents than the reported 2H-MoS2 absorbers. Based on the εr-f spectra, the reflection loss-frequency curves () are simulated at given thicknesses. An effective absorption bandwidth of 5.2 GHz (12.8–18 GHz) and a peak of −29.49 dB are achieved in a thin thickness of 1.62 mm, which are comparable to the reported 2H-MoS2 absorbers with complex composition, showing that the 1T/2H-MoS2/Mo2S3 nanocomposites have great application potential as an EM wave absorber in the Ku band. |
| |
Keywords: | Interface polarization Dipole orientation polarization Electronic relaxation polarization Electromagnetic wave absorption Impedance matching Destructive interference |
本文献已被 ScienceDirect 等数据库收录! |
|