文献类型：期刊文献

英文题名：Constructing dendrite-flower-shaped Fe3O4 crystals in glass-ceramic materials as novel broadband high-efficient electromagnetic wave absorbers

作者：Wang, Xiaoyang[1];Huang, Jianguo[1];Feng, Hao[1];Li, Jinfeng[1];Xu, Zehao[1];Xiong, Kaiwen[1];Zhang, Yuantao[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：901

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20220311459671);WOS:【SCI-EXPANDED(收录号:WOS:000749784000004)】；

基金：This work was supported by the Project of the National Natural Science Foundation of China (contract grant number 52072123) .

语种：英文

外文关键词：Broadband; Snoek limit; Electromagnetic wave absorption; Fe3O4; Microstructure

摘要：The Snoek limit hinders strong and wideband electromagnetic wave (EMW) absorption, and to meet this challenge, it is essential to obtain an economical and scalable microstructural solution. In this work, we used a SiO2-B2O3-RO-Fe2O3 multicomponent glass system to design microstructures using dendritic Fe(2)O(3 )crystal precipitates in the amorphous glass matrix. The flower-like Fe(2)O(3 )structures that formed in situ at the grain interface exhibited a significant strengthening effect on EMW absorption performance. The minimum reflection loss (RL) value reached - 61.0 dB at 7.2 GHz when the sample thickness was 3.3 mm, and the effective absorption bandwidth (EAB) was 6.0 GHz (8.6-14.6 GHz), with a sample thickness of 2.4 mm. This approach not only provided a novel strategy for constructing synergistic multiple transmission-absorption mechanisms, but also provided an option for developing inexpensive high-performance EMW-absorbing materials. (C) 2021 Elsevier B.V. All rights reserved.