Fabrication of ZnS/C microsphere composites with enhanced electromagnetic wave absorption properties

• Published in: Journal of materials science. Materials in electronics 2022-09, Vol.33 (25), p.20021-20034
• Main Authors: Xing, Honglong, Wang, Yin, Bai, Linghan, Ji, Xiaoli, Yang, Ping
• Format: Article
• Language: English
• Subjects: Absorption; Carbon; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composite materials; Conduction losses; Dipoles; Electromagnetic radiation; Materials Science; Metal sulfides; Microscopy; Microspheres; Optical and Electronic Materials; Polarization; Spectrum analysis; Spheres; Substrates; Zinc sulfide
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-022-08820-7

For electromagnetic wave-absorbing materials, organic-derived carbon materials and metal sulfides are highly preferred. In this paper, ZnS/C microsphere composites were prepared using calcination and hydrothermal method. The carbon microsphere material derived from d -xylose was used as a substrate, and zinc sulfide was grown on its surface, thus enhancing the interfacial polarization loss of the material. Considering the defects that originate from within the carbon microspheres and the excellent conductive properties, the composite material involved dipole polarization and conduction losses. These loss mechanisms are coordinated with the optimum impedance match obtained by adjusting the addition of carbon microspheres, resulting in the RL min value of − 44.86 dB and the EAB max of 5.68 GHz for the ZnS/C microsphere composite.