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A Competitive Reaction Strategy toward Binary Metal Sulfides for Tailoring Electromagnetic Wave Absorption

机译：用于剪裁电磁波吸收的二元金属硫化物的竞争反应策略

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摘要

The development of multicomponent dielectric composites has become a mainstream approach for obtaining excellent electromagnetic wave (EMW) absorbers. However, conventional component introduction is often performed blindly and based only on semiempirical rules, lacking precise modulation of components, interfaces, and defects during the reaction process. Herein, a competitive reaction mechanism is proposed for the first time, in which not only the metal ion concentration but also its characteristic are two feasible parameters to control the components, interfaces, and defects to tailor the EMW absorption performances of Cu-based binary metal sulfides. The appropriate heterogeneous interfaces and components and the abundant defects can synergistically benefit the EMW absorption capacity by forming perfect impedance matching and multiple dielectric polarizations. As a result, combined with these advantages, an effective absorption band) of 6.80 GHz (6.3-13.1 GHz) is achieved at 2.80 mm for Cu-Co binary metal sulfide, showing the sole middle-frequency broadband absorption of reported sulfide-based absorbers to date. Other Cu-based binary metal sulfides deliver different EMW absorption behaviors. This work breaks through the limitation of traditional component design, opening up a novel methodology for designing multicomponent composites beyond sulfides with broadband absorption.
机译：多组分电介质复合材料的发展已成为获得优异的电磁波（EMW）吸收剂的主流方法。然而，常规组分介绍通常盲目地进行，并且仅基于半透镜规则，缺乏在反应过程中缺乏组件，界面和缺陷的精确调制。在此，首次提出了竞争反应机制，其中不仅是金属离子浓度，而且其特征是控制组分，界面和缺陷来定制Cu基二元金属的EMW吸收性能的两个可行参数硫化物。通过形成完美的阻抗匹配和多种介电偏振，适当的异构接口和组件和丰富的缺陷可以协同益处EMW吸收能力。结果，与这些优点相结合，有效吸收带）在2.80mm的Cu-Co二元金属硫化物的2.80mm下实现了有效吸收带，显示了报告的硫化物基吸收剂的唯一中频宽带吸收迄今为止。其他基于Cu基二元金属硫化物提供不同的肌肉吸收行为。这项工作突破了传统组件设计的限制，开辟了一种用于设计具有宽带吸收的多组分复合材料的新方法。

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  • 来源
    《Advanced Functional Materials》 |2021年第45期|2105018.1-2105018.11|共11页
  • 作者

    Liu Jiaolong; Zhang Limin; Zang Duyang; Wu Hongjing;

  • 作者单位

    Northwestern Polytech Univ Sch Phys Sci & Technol MOE Key Lab Mat Phys & Chem Extraordinary Xian 710072 Peoples R China;

    Northwestern Polytech Univ Sch Phys Sci & Technol MOE Key Lab Mat Phys & Chem Extraordinary Xian 710072 Peoples R China;

    Northwestern Polytech Univ Sch Phys Sci & Technol MOE Key Lab Mat Phys & Chem Extraordinary Xian 710072 Peoples R China;

    Northwestern Polytech Univ Sch Phys Sci & Technol MOE Key Lab Mat Phys & Chem Extraordinary Xian 710072 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    competitive reaction; defects; electromagnetic wave absorption; interfaces; sulfides;

    机译：竞争反应;缺陷;电磁波吸收;界面;硫化物;

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