Controllable Fabrication of Fe₃O₄/ZnO Core⁻Shell Nanocomposites and Their Electromagnetic Wave Absorption Performance in the 2⁻18 GHz Frequency Range

Overview

Journal Materials (Basel)

Publisher MDPI

Date 2018 May 13

PMID 29751645

Citations 5

Authors

Xiaodong Sun

Guangyan Ma

Xuliang Lv

Mingxu Sui

Huabing Li

Fan Wu

JiJun Wang

Affiliations

Soon will be listed here.

Abstract

In this study, Fe₃O₄/ZnO core⁻shell nanocomposites were synthesized through a chemical method of coating the magnetic core (Fe₃O₄) with ZnO by co-precipitation of Fe₃O₄ with zinc acetate in a basic medium of ammonium hydroxide. The phase structure, morphology and electromagnetic parameters of the Fe₃O₄/ZnO core⁻shell nanocomposites were investigated. The results indicated that the concentration of the solvent was responsible for controlling the morphology of the composites, which further influenced their impedance matching and microwave absorption properties. Moreover, Fe₃O₄/ZnO nanocomposites exhibited an enhanced absorption capacity in comparison with the naked Fe₃O₄ nanospheres. Specifically, the minimum reflection loss value reached −50.79 dB at 4.38 GHz when the thickness was 4.5 mm. It is expected that the Fe₃O₄/ZnO core⁻shell structured nanocomposites could be a promising candidate as high-performance microwave absorbers.

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