Preparation and Microwave Absorbing Performance of Carbon-based Iron Nitride Nanocomposites

doi:10.11901/1005.3093.2014.256

Chinese Journal of Materials Research

2014, Vol. 28

Issue (11): 842-848 DOI: 10.11901/1005.3093.2014.256

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Preparation and Microwave Absorbing Performance of Carbon-based Iron Nitride Nanocomposites

Fazhan LI^1,²,Meijie YU^2,^**(

),Yong XU³,Chengguo WANG²,Rui GAO²,Qiong MAO²,Xiaochen CUI²

1. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan 250061
2. Carbon Fiber Engineering Research Center, College of Materials Science and Engineering, Shandong University, Jinan 250061
3. College of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101

Cite this article:

Fazhan LI,Meijie YU,Yong XU,Chengguo WANG,Rui GAO,Qiong MAO,Xiaochen CUI. Preparation and Microwave Absorbing Performance of Carbon-based Iron Nitride Nanocomposites. Chinese Journal of Materials Research, 2014, 28(11): 842-848.

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Abstract

Carbon-based iron nitride nanocomposites were prepared by means of preoxidation and then carbonization of a uniformly blended mixture nano-iron powders and liquid polyacrylonitrile. The prepared nanocomposites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The electromagnetic performance of the nanocomposites was evaluated by magnetometer and vector network analyzer, and therewith the effect of the carbonization temperature on microwave absorbing performance could be acquired. The results show that the nanocomposite with the desired phase composition can be prepared after carbonization at 750℃. A 1.5 mm thick coating of the nanocomposite has the maximum reflection loss value -13 dB at 15 GHz, and the absorption bandwidths with reflection loss lower than -10 dB are up to 4.5 GHz.

Key words: composites absorbing material amorphous carbon iron nitride electromagnetic properties

Received: 16 May 2014

Fund: *Supported by National Natural Science Foundation of China No.51101093, and Independent Innovation Foundation of Shandong University No.Z462012ZD048.

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	Fazhan LI
	Meijie YU
	Yong XU
	Chengguo WANG
	Rui GAO
	Qiong MAO
	Xiaochen CUI

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https://www.cjmr.org/EN/10.11901/1005.3093.2014.256 OR https://www.cjmr.org/EN/Y2014/V28/I11/842

Fig.1 Synthetic route of polyacrylonitrile

Fig.2 Process for the preparation of the carbon-based nanocomposites

Table 1 Preoxidization process

Table 2 Carbonization process and the corresponding sample

Fig.3 XRD patterns of different stage in the preparation of the carbon-based nanocomposites (a) and the detail with enlarged scale (b) (a-the nano-iron after surface treatment, b-the material before the peroxidation, c-the material after the peroxidation, d- the material after the carbonization)

Fig.4 XRD patterns of the product in different atmosphere

Fig.5 XRD patterns of the product in different carbonization temperatures

Fig.6 SEM (a) and TEM (b) images of sample D

Fig.7 SEM image (a) of sample D and EDS element mapping of Fe (b), N (c)

Fig.8 Magnetic hysteresis loop of sample D

Fig.9 Dielectric constant of the real part (a), the imaginary part (b), the permeability (c) vs frequency of sample C, D, E and the dielectric loss and magnetic loss (d) vs frequency of sample D

Fig.10 Reflection loss of samples C, D, E with the thickness of 2 mm within the frequency range of 2-18 GHz

Fig.11 Dependence of reflection loss on the thickness of the absorption layer within the frequency range of 2-18 GHz for sample D

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