利用煤矸石制备Fe3O4和Fe负载的微波吸收材料

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (9): 2998-3004.

利用煤矸石制备Fe₃O₄和Fe负载的微波吸收材料

力国民, 苏宁静, 朱保顺, 梁丽萍, 田玉明

太原科技大学材料科学与工程学院,太原 030024

收稿日期:2021-03-26 修回日期:2021-04-16 出版日期:2021-09-15 发布日期:2021-10-08
通讯作者: 梁丽萍,博士,教授。E-mail:liangliping@tyust.edu.cn
作者简介:力国民(1984—),男,博士,副教授。主要从事功能陶瓷的研究。E-mail:ligm@tyust.edu.cn
基金资助:
国家自然科学基金(51802212);山西省自然科学基金(201801D221119);山西省研究生联合培养基地人才培养项目(2018JD34)

Fe₃O₄ and Fe Loaded Composites as Microwave Absorbents by Recycling of Gangue

LI Guomin, SU Ningjing, ZHU Baoshun, LIANG Liping, TIAN Yuming

School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China

Received:2021-03-26 Revised:2021-04-16 Online:2021-09-15 Published:2021-10-08

摘要/Abstract

摘要： 为了实现固废煤矸石的有效资源化利用,本文利用煤矸石设计合成了负载Fe₃O₄和Fe的陶瓷复合微波吸收材料。实验主要包括煤矸石的造粒成球、液相负载Fe³⁺及焙烧过程,利用X射线衍射仪(XRD)、拉曼光谱仪(Raman)和扫描电镜(SEM)对样品的物相与微观结构进行了分析表征。结果表明,前驱体溶液经过分解反应、碳热还原反应转化为Fe₃O₄和Fe,原位负载于煤矸石基体上,并显现铁磁特性。借助矢量网络分析仪测试样品的电磁参数,基于传输线理论分析评价其微波吸收性能。由于良好的阻抗匹配与衰减特性,复合材料FeG700体现出良好的吸波能力,在涂层厚度为1.5 mm时,最低反射损耗值为-20.1 dB,有效吸收带宽可达4.1 GHz。本研究不仅有助于实现微波吸收材料制备的低成本化,重要的是为固废煤矸石的综合利用提供了借鉴。

关键词: 煤矸石, 固废利用, 磁性, 复合材料, 微波吸收

Abstract: In order to realize the effective resource utilization of gangue, the Fe₃O₄ and Fe loaded ceramic composite microwave absorbent was designed and synthesized by recycling the gangue in this paper. The experiment mainly involved the pelletizing of gangue, loading precursor solution (Fe³⁺) and sintering process. Meanwhile, the phase composition and micro-structure of the as prepared sample were characterized by X-ray diffraction (XRD), Raman spectroscopy and scanning electron microscope (SEM). It is found that the precursor solution is transformed into Fe₃O₄ and Fe after the decomposition reaction and carbothermal reduction reaction, in-situ loading on the gangue and exhibiting the ferromagnetic characteristic. Besides, the electromagnetic parameters are obtained through the vector network analyzer, and the microwave absorbing property is evaluated according to the transmission line theory. Furthermore, the FeG700 composite exhibits excellent electromagnetic absorbing ability, the effective absorption bandwidth reaches 4.1 GHz and the minimum reflection loss value reaches -20.1 dB correspondingly when the coating thicknesses is 1.5 mm, which is mainly benefited from the effective impedance match and attenuation characteristic. The novel method in this work is not only beneficial for the low-cost of microwave absorbents, but also provides a new avenue for the comprehensive utilization of gangue.

Key words: coal gangue, solid waste utilization, magnetic, composite, microwave absorption

中图分类号:

TB34

力国民, 苏宁静, 朱保顺, 梁丽萍, 田玉明. 利用煤矸石制备Fe₃O₄和Fe负载的微波吸收材料[J]. 硅酸盐通报, 2021, 40(9): 2998-3004.

LI Guomin, SU Ningjing, ZHU Baoshun, LIANG Liping, TIAN Yuming. Fe₃O₄ and Fe Loaded Composites as Microwave Absorbents by Recycling of Gangue[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(9): 2998-3004.

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利用煤矸石制备Fe₃O₄和Fe负载的微波吸收材料

Fe₃O₄ and Fe Loaded Composites as Microwave Absorbents by Recycling of Gangue

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