Microstructure, electrical conductivity and microwave absorption properties of γ-FeNi decorated carbon nanotube composites

Microstructure, electrical conductivity and microwave absorption properties of γ-FeNi decorated carbon nanotube composites
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γ-FeNi修饰碳纳米管复合材料的微观结构、电导率及微波吸收性能

DOI:
10.1016/j.compositesb.2015.09.056
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发表时间:
2016-02
期刊:
Composites Part B: Engineering
影响因子:
--
通讯作者:
Mircea Chipara
Mircea Chipara
中科院分区:
其他
文献类型:
--
作者:
Qiaoxin Yang;Ling Liu;David Hui;Mircea Chipara

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采用湿化学法制备了γ-FeNi合金/碳纳米管(γ-FeNi/CNT)纳米复合粒子。用XRD、TEM和EDS对所得纳米粒子的微观结构进行了表征。然后将该粒子分散到环氧树脂中制成导电和吸波复合材料。结果表明,所制备的γ-FeNi纳米粒子均匀地沉积在碳纳米管表面,平均粒径为16 nm。环氧基纳米复合材料表现出半导电行为,在16.5 GHz的最大反射损耗为-15.4 dB,具有薄厚度(1.6 mm)和低颗粒负载(2 wt%)的样品。在微波吸收强度和样品厚度相似的情况下,本研究中使用的颗粒负载量(2wt%)远低于以往研究中报道的颗粒负载量(约30wt%)。
Nano-composite particles of γ-FeNi alloy/carbon nanotube (γ-FeNi/CNT) were successfully synthesized by wet chemical method. Microstructure of the as obtained nanoparticles was characterized by XRD, TEM, and EDS. The particles were then dispersed into epoxy resin to make conductive and microwave absorbing composites. Results have shown that the expected γ-FeNi nanoparticles were uniformly deposited a on the surfaces of CNTs with an average diameter of 16 nm. The epoxy based nanocomposites exhibited semi-conductive behavior and a maximum reflection loss of −15.4 dB at 16.5 GHz were obtained with thin thickness (1.6 mm) and low particles loading (2 wt%) of specimen. With similar microwave absorption strength and thickness of specimen, the particles loading used in this research (2 wt%) was much more lower than that reported in previous studies (∼30 wt%).
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