An ultra-wideband electromagnetic shielding concrete based on multi-scale conductive fillers

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-07-09 DOI:10.1016/j.matlet.2025.139080

Yingxiang Wang , Chao Ma , Shuai Xie , Zihao Wu , Zhijiang Ji

引用次数: 0

Abstract

In order to address the challenge of balancing strength and high shielding performance in concrete, an ultra-wideband electromagnetic shielding concrete was developed in this work by incorporating nano-scale carbon black, micro-scale graphite, and millimeter-scale steel fibers to construct a multi-scale hierarchical conductive network. The results demonstrate that the shielding concrete exhibits excellent mechanical and shielding properties. The electrical conductivity of the shielding concrete reaches up to 0.17 S/m. In the MHz frequency range, the average SE exceeds 30 dB, while in the GHz range, the SE is significantly higher, ranging between 65–109 dB. Meanwhile, the 28-day compressive strength of the shielding concrete remains above 45 MPa, complying with the Chinese National Standard GB50010.

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基于多尺度导电填料的超宽带电磁屏蔽混凝土

为了解决混凝土在强度和屏蔽性能上的平衡问题，本研究采用纳米级炭黑、微米级石墨和毫米级钢纤维构建多尺度分层导电网络，研制了一种超宽带电磁屏蔽混凝土。结果表明，该屏蔽混凝土具有良好的力学性能和屏蔽性能。屏蔽混凝土的导电性可达0.17 S/m。在MHz频率范围内，平均SE超过30 dB，而在GHz频率范围内，SE明显更高，在65-109 dB之间。同时，屏蔽混凝土28天抗压强度保持在45mpa以上，符合中国国家标准GB50010。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive