Fabrication and microwave absorbing properties of (Z-type barium ferrite/silica)@polypyrrole composites

“…carbon black, carbon nanotubes, silicon carbide, and graphite) have gained much attention due to their unique combination of electrical conduction, polymeric compatibility, lightweight, and resistant to corrosion (Hwang, 2006;Wu, Ting, Liu, Yang, & Hsu, 2008). In the past decades, ferrites have been used as microwave absorbents in various forms due to their lightweight, low cost, and good design flexibility (Liu, Zhang, & Wu, 2011;Shen, Chen, Li, Wang, & Jin, 2014;Wu, Ting, Wang, Ho, & Shih, 2008;Zhang et al, 2014). As ferromagnetic metals have a high saturation magnetization and complex permeability, they were studied as microwave absorbers for many years (Al-Saleh & Sundararaj, 2009;Qing, Zhou, Luo, & Zhu, 2010;Zhan, Zhao, Lei, Meng, Zhong, & Liu, 2011).…”

Section: Introductionmentioning

confidence: 99%

The research of EM wave absorbing properties of ferrite/silicon carbide/graphite three-layer composite coating knitted fabrics

Liu

Zhao

Xiao

2015

The Journal of The Textile Institute

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The polyester knitted fabric was used as a basilicon carbide structure material. A three-layer composite coating finishing was applied to the structure material using ferrite, silicon carbide, and graphite absorbing materials. The single factor test method was used in this series of research. The impact on dielectric constant and loss tangent of absorbtion of each agent and the coating thickness of each layer were studied. From these results, the three-layer composite coating materials that had excellent absorbing properties were selected and prepared. The results showed that when the ferrite (60 wt%) was used as a bottom layer, the silicon carbide (36 wt%) was used as a middle layer and the graphite (24 wt%) was used as a surface layer with the respective thickness of 0.5, 0.3, and 0.3 mm, an excellent microwave absorbing property was noted for the three-layer composite coating material. In order to meet the requirements for the engineering field, physilicon carbideal and mechanical properties of the microwave absorbing materials were also characterized.

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“…Yet due to the rapid development of the battlefield detection, guidance means diversity and compound guidance technology, single function absorbing material has proved difficult to meet the requirements of modern military, the composite material with multi functions has become an advance direction [3,4].…”

Section: Introductionmentioning

confidence: 99%

A composite material based on BaZn2Fe16O27 ferrite and antimony-doped tin oxide composite with excellent microwave absorbing property and 1.06 μm reflection performance

Zhang

Wang

Zhang

2015

J Mater Sci: Mater Electron

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Multi functional composite materials based on BaZn 2 Fe 16 O 27 (BZF) ferrite and antimony-doped tin oxide (the mole ratio of Sb/Sn is 1:5) composite were prepared by co-precipitation method. The structure, morphology, and property of the composites are characterized using X-ray diffraction, scanning electron microscopy, UV-visible spectroscopy, and a network analyzer. The results showed that nano ATO particles were formed on the surface of flake ferrite. Upon the addition of ATO particles, the complex permittivity of the BZF/ATO composites increases, while the complex permeability of the BZF/ATO composites increases firstly, and then decreases. The reflection loss varies with the change of the BZF/ATO mole ratio, even more the reflection loss peak changes. At 2.7 mm thickness, the reflection loss of the BZF/ATO composites with a mole ratio of 1:1 reaches the maximum value -58.91 dB at 8.08 GHz, and the bandwidth over an absorptivity of 90 % (-10 dB reflection loss) is 9.28 GHz (ranging from 6.32 to 15.6 GHz). The 1.06 lm laser reflection of BZF/ATO composites decreases to a minimum 4.662 %, when the mole ratio of BZF/ATO is 2:1.

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Fabrication and microwave absorbing properties of (Z-type barium ferrite/silica)@polypyrrole composites

Cited by 64 publications

References 25 publications

Synthesis and enhanced microwave absorption properties of PVB/Co 2 Z/RGO layered composite

Synthesis and enhanced microwave absorption properties of PVB/Co 2 Z/RGO layered composite

The research of EM wave absorbing properties of ferrite/silicon carbide/graphite three-layer composite coating knitted fabrics

A composite material based on BaZn2Fe16O27 ferrite and antimony-doped tin oxide composite with excellent microwave absorbing property and 1.06 μm reflection performance

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