镍渣衍生Fe<sub>3</sub>O<sub>4</sub>/聚苯胺复合材料的制备及微波吸收性能研究

doi:10.11896/cldb.22030093

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Abstract The comprehensive utilization of nickel slag has received more and more attention in recent years due to its contents of many valuable metal elements. Fe₃O₄ particles extracted from nickel slag exhibit a certain degree of microwave absorbing capability, but accompany the limits of high density and poor impedance matching. In this work, Fe₃O₄ particles were extracted from nickel slag by molten oxidation, magnetic separation and ball milling processes, and using them with aniline to prepare Fe₃O₄ particles extracted from nickel slag (FPENS)/polyaniline (PANI) composite by an in-situ oxidative polymerization method. The phase composition, microstructure and magnetic properties of the FPENS/PANI composite were characterized, and its microwave absorbing properties and absorbing mechanism of the composites were explored. The results show that the relative content of polyaniline in the FPENS/PANI composite material has a great influence on its absorption performance. When the mass ratio of Fe₃O₄ and polyaniline was 5∶1, the values of minimum reflection loss (RL_min) of the composite reached -38.9 dB at 15.8 GHz with the matching thickness of 1.5 mm and the effective bandwidth of 4.24 GHz. The loss of electromagnetic waves by the composite mainly comes from magnetic loss and dielectric loss, in which the magnetic loss is mainly dominated by natural resonance and exchange resonance, and the dielectric loss is mainly dominated by dipolar polarization and interface polarization. This work provides a new idea for the comprehensive utilization of nickel slag.

Key words： nickel slag magnetite polyaniline composites microwave absorption

Published: 25 November 2023 Online: 2023-11-21

CLC number:

TF09

Fund:Major Science and Technology Project of Gansu Province (19ZD2GD001) and the Natural Science Foundation of Gansu Province (21JR7RA222).

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	Articles by authors
	MAN Shijia
	DU Xueyan
	SHEN Yongqian
	LONG Jian

Cite this article:

MAN Shijia,DU Xueyan,SHEN Yongqian, et al. Preparation and Microwave Absorption Properties of FPENS/PANI Composites[J]. Materials Reports, 2023, 37(22): 22030093-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22030093 OR http://www.mater-rep.com/EN/Y2023/V37/I22/22030093

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