Two-Step Solvothermal Synthesis of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs Hybrid with Enhanced Low Frequency Microwave Absorbing Performance.

Pengfei Yin,Xing Feng,Hanbing Rao,Jianwu Dai,Yuting Tang,Yanying Wang,Jian Wang,Limin Zhang,Hongjing Wu

doi:10.3390/nano9111601

Pengfei Yin, Xing Feng + Show 7 more

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https://doi.org/10.3390/nano9111601

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Abstract

In this study, the quaternary hybrid of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs with high-performance in low frequency electromagnetic absorption was synthesized via a facile two-step solvothermal synthesis method. The physicochemical properties as well as electromagnetic parameters and microwave absorption performance were characterized by XRD, SEM, TEM, RS, TGA, and VNA, respectively. The results indicate a nuclear-shell morphology of this hybrid for amorphous carbon coated on the surface of Zn0.5Co0.5Fe2O4 and Mn0.5Ni0.5Fe2O4 mixed polycrystalline ferrites. In addition, the MWCNTs synchronously enwind in the nuclear-shell NPs to form a special cross-linking structure. The outstanding low frequency microwave absorption property is attributed to the synergistic effect of dielectric and magnetic loss, better impedance matching condition, and excellent attenuation characteristics of the as-prepared paramagnetic quaternary hybrid. Maximum RL of −35.14 dB at 0.56 GHz with an effective absorption bandwidth in the range of 0.27–1.01 GHz can be obtained with thickness of 5 mm. This hybrid exhibits superior low frequency microwave absorption properties compared with other ferrite-carbon nanocomposites. This investigation provides a new route to prepare suitable candidates for the absorption of electromagnetic waves in a low frequency band on account of its good performance and simple preparation process.

Highlights

IntroductionPresent investigations on microwave absorption materials (MAMs) are mainly focused in the frequency range of 2–18 GHz. The electromagnetic absorption of these composites is very limited in the low frequency range of 0.1–2 GHz. the electromagnetic radiation generated from electronic devices used daily is in a low frequency range, and the detection frequency of many radars e.g. meter-wave radar, phased array radar, spaceborne radar, etc
In spite of this, present investigations on microwave absorption materials (MAMs) are mainly focused in the frequency range of 2–18 GHz
The results show that the quaternary hybrid can have excellent electromagnetic wave absorbing performance in a low frequency range, and such a hybrid can be used as a promising electromagnetic wave absorber in this band

Summary

Introduction

Present investigations on MAMs are mainly focused in the frequency range of 2–18 GHz. The electromagnetic absorption of these composites is very limited in the low frequency range of 0.1–2 GHz. the electromagnetic radiation generated from electronic devices used daily is in a low frequency range, and the detection frequency of many radars e.g. meter-wave radar, phased array radar, spaceborne radar, etc. The electromagnetic radiation generated from electronic devices used daily is in a low frequency range, and the detection frequency of many radars e.g. meter-wave radar, phased array radar, spaceborne radar, etc. Has been extended to the low frequency region This poses a significant challenge in the design of MAMs with outstanding electromagnetic wave absorption capacity in the low frequency band [25,26]. The results show that the quaternary hybrid can have excellent electromagnetic wave absorbing performance in a low frequency range, and such a hybrid can be used as a promising electromagnetic wave absorber in this band

Materials

Characterization

Results and Discussion

Conclusions