• 文献标题:   Synthesis of core-shell ZnFe2O4@SiO2 hollow microspheres/reduced graphene oxides for a high-performance EM wave absorber
  • 文献类型:   Article
  • 作  者:   ZHANG N, HUANG Y, ZONG M, DING X, LI SP, WANG MY
  • 作者关键词:   composite, hollow microsphere, rgo, em wave absorption propertie
  • 出版物名称:   CERAMICS INTERNATIONAL
  • ISSN:   0272-8842 EI 1873-3956
  • 通讯作者地址:   Northwestern Polytech Univ
  • 被引频次:   13
  • DOI:   10.1016/j.ceramint.2016.09.035
  • 出版年:   2016

▎ 摘  要

The core-shell ZnFe2O4@SiO2 hollow microspheres/reduced graphene oxides (RGO-ZnFe2O4@SiO2) composites were successfully synthesized by a rational process. SEM and TEM results illustrate that the ZnFe2O4@SiO2 hollow microspheres are of core-shell structure with an average diameter of about 1 gm mixed with graphene sheets. Compared with ZnFe2O4@SiO2 hollow microspheres and RGO-ZnFe2O4 composites, the as-prepared RGO-ZnEe(2)O(4)@SiO2 composites exhibit excellent electromagnetic (EM) wave absorption properties in terms of both the maximum reflection loss and the absorption bandwidth. The maximum reflection loss of RGO-ZnFe2O4@SiO2 composites is -45.8 dB at 7.6 GHz with the thickness of 3.7 mm and the absorption bandwidth with the reflection loss below -10 dB is up to 14.5 GHz (from 3.5 to 18.0 GHz) with a thickness in the range of 2.0-6.0 mm. It may also be stressed that the developed composites cover the whole X band (8.0-12.0 GHz), which could be used for military radars and direct broadcast satellites (DBS).