<strong>MoS<sub>2</sub>/CoFe/C</strong>复合材料的制备和吸波性能

doi:10.11901/1005.3093.2020.486

材料研究学报

2021, Vol. 35

Issue (12): 925-932 DOI: 10.11901/1005.3093.2020.486

研究论文

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MoS₂/CoFe/C复合材料的制备和吸波性能

张远, 冀志江(

), 解帅, 王静, 司甜甜

中国建筑材料科学研究总院有限公司绿色建筑材料国家重点实验室北京 100024

Preparation and Microwave Absorbing Properties of MoS₂/CoFe/C Composite

ZHANG Yuan, JI Zhijiang(

), XIE Shuai, WANG Jing, SI Tiantian

China Building Material Academy, State Key Laboratory of Green Building Materials, Beijing 100024, China

引用本文:

张远, 冀志江, 解帅, 王静, 司甜甜. MoS₂/CoFe/C复合材料的制备和吸波性能[J]. 材料研究学报, 2021, 35(12): 925-932.
Yuan ZHANG, Zhijiang JI, Shuai XIE, Jing WANG, Tiantian SI. Preparation and Microwave Absorbing Properties of MoS₂/CoFe/C Composite[J]. Chinese Journal of Materials Research, 2021, 35(12): 925-932.

全文: PDF(11673 KB) HTML

摘要:

先水热合成MoS₂/CoFe₂O₄纳米复合吸波材料，再通过合理的物料配比并使用无水葡萄糖作为碳源和还原剂，使MoS₂/CoFe₂O₄复合材料在氮气氛中还原为MoS₂/CoFe/C三元纳米复合材料。对这种复合材料的形貌、相结构及电磁参数进行表征、模拟分析其最佳匹配厚度和吸波性能，研究了碳源浓度对复合材料的组成和性能的影响并根据弛豫理论讨论其吸波机制。结果表明，厚度为3 mm的这种复合材料在12.4 GHz处的最低反射损耗可达-42.9 dB；厚度为4 mm时低于-10 dB的频带宽度可达7.1 GHz。

关键词 ：复合材料, 吸波材料, 水热反应, 磁性纳米颗粒, 介电损耗

Abstract：

The composite absorbing material of MoS₂/CoFe/C was prepared via a two-step process, namely, the MoS₂/CoFe₂O₄ was hydro-thermally synthesized with anhydrous glucose as carbon source and reducing agent in a reasonable material ratio, which then was reduced to MoS₂/CoFe/C of ternary-nanometer flower structure in nitrogen atmosphere. The morphology, phase structure and electromagnetic parameters of the ternary nanomaterial were characterized, while the relation of the optimum matching thickness and absorbing property of the composite was assessed with computer simulation. The effect of glucose concentrations on the composition and properties of the composites were investigated. The absorption mechanism was discussed based on the Relaxation Polarization theory. When the thickness is 3 mm the lowest reflectivity of MoS₂/CoFe/C composite material at 12.4 GHz can reach -42.9 dB. When the thickness is 4 mm the reflectivity frequency of MoS₂/CoFe/C composite material is lower than -10 dB with bandwidth up to 7.1 GHz.

Key words： composite electromagnetic wave absorbing materials hydrothermal reaction magnetic nanoparticles dielectric loss

收稿日期: 2020-11-12

ZTFLH:

TB333

基金资助:绿色建筑材料国家重点实验室十四五预研项目(ZA-23)

作者简介: 张远，男，1998年生，硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2020.486 或 https://www.cjmr.org/CN/Y2021/V35/I12/925

图1 MoS2/CoFe2O4和MoS2/CoFe/C复合材料的XRD谱

图2 复合材料MoS2/CoFe2O4、MoS2/CoFe/C-0.234、MoS2/CoFe/C-0.468、MoS2/CoFe/C-0.702的扫描电镜照片以及MoS2@C@CoFe-0.468的选区元素面分布图(Mo, S, C, Fe, Co)

图3 复合材料MoS2/CoFe2O4、MoS2/CoFe/C-0.234、MoS2/CoFe/C-0.468和MoS2/CoFe/C-0.702的反射损耗

图4 复合材料MoS2/CoFe/C的磁滞回线和MoS2/CoFe/C的拉曼谱

图5 复合材料MoS2/CoFe2O4和MoS2/CoFe/C的相对复介电常数的实部ε'、虚部ε″和介电损耗角正切tan?δe，以及相对复磁导率的实部μ'、虚部μ″和磁损耗角正切tan?δμ

图6 复合材料MoS2/CoFe2O4和MoS2/CoFe/C的柯尔-柯尔图

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