Optimizing the Electromagnetic Wave Absorption Performances of Designed Co3Fe7@C Yolk–Shell Structures

• DOI: 10.1021/acsami.8b08040
• Publication Date: 2018-08-06T11:54:24Z
• Authors: Hao Li; Susu Bao; Yunmei Li; Yuqian Huang; Jiayu Chen; Hui Zhao; Zhiyuan Jiang; Qin Kuang; Zhaoxiong Xie
• Keywords: Reflection loss; Void (composites)

Due to the increasing demand for military and commercial applications, magnetic metal-based core@shell nanostructures have attracted extensive attention in field of electromagnetic wave (EMW) absorption materials. To further improve overall performance, herein, an effective strategy is designed fabricate Co3Fe7@C yolk-shell structures by using (Co0.9Fe0.1)Fe2O4@phenolic resin as precursors. The structure parameters, including size CoFe alloy cores, thickness carbon shell, void between core can be tailored controlling reaction conditions. It demonstrated that EMW properties as-prepared are closely related their parameters. optimized shows excellent strongest reflection loss (RL) up -35.3 dB at 9.1 GHz with matching 2.0 mm, bandwidth (RL < -10 dB) reach 8.4 (9.6-18 GHz) a only 1.5 mm. revealed performances stem from unique well complementarities synergies dielectric loss. By rational designing, metal alloy@carbon will convinced potential novel high-efficiency materials lightweight, low thickness, wide frequency, high stability, strong characteristics.