Fe-MOFs derived porous Fe4N@carbon composites with excellent broadband electromagnetic wave absorption properties

被引：35

作者：

Liang, Xuechen ^{[1
,2
]}

Wang, Chengguo ^{[1
,2
]}

Yu, Meijie ^{[1
,2
]}

Yao, Zhiqiang ^{[1
,2
]}

Zhang, Ye ^{[1
,2
]}

机构：

[1] Shandong Univ, State Key Lab Crystal Mat, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Peoples R China

[2] Shandong Univ, Sch Mat Sci & Engn, Carbon Fiber Engn Res Ctr, Jinan 250061, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 910卷

基金：

中国国家自然科学基金;

关键词：

Fe-metal organic frameworks; Iron nitride; Electromagnetic wave absorption; Dielectric loss; Magnetic loss; MAGNETIC-PROPERTIES; EFFICIENT; NANOCOMPOSITES; PERFORMANCE; LIGHTWEIGHT; DESIGN;

D O I：

10.1016/j.jallcom.2022.164844

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Designing components and optimizing structure is considered an effective strategy to enhance the electromagnetic wave absorption of materials. In this study, a two-step method was successfully used to fabricate Fe-metal-organic framework derived iron nitride and carbon-based composites, which combined the porous structure of metal-organic frameworks with the excellent electromagnetic properties of Fe4N. By comparing the composite samples' morphology, structure, composition characteristics, and electromagnetic properties before and after nitriding, reasons for improving electromagnetic wave absorption performance are revealed. The formation of the Fe4N phase and the porous structure optimize impedance matching, which significantly enhances the electromagnetic wave absorption capacity of the composite. When the Fe4N @ carbon composite has a matching thickness of 2 mm, the minimum reflection loss reaches - 56 dB, and when the matching thickness is 2.5 mm, the reflection loss reaches - 42 dB at 13.4 GHz. The effective absorption bandwidth reaches 6.7 GHz. This research brings a new design scheme for improving electromagnetic wave absorption materials. (C) 2022 Elsevier B.V. All rights reserved.

引用

页数：11

共 73 条

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