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首页> 外文期刊>ACS applied materials & interfaces >Space-Confined Synthesis of Core-Shell BaTiO3@Carbon Microspheres as a High-Performance Binary Dielectric System for Microwave Absorption
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Space-Confined Synthesis of Core-Shell BaTiO3@Carbon Microspheres as a High-Performance Binary Dielectric System for Microwave Absorption

机译：核心壳BATIO3 @碳微球作为微波吸收的高性能二元介质系统的空间狭窄的合成

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摘要

Binary dielectric composites are viewed as a kind of promising candidate for conventional magnetic materials in the field of microwave absorption. Herein, we demonstrate the successful fabrication of core-shell BaTiO3@carbon microspheres through a space-confined strategy. The electromagnetic properties of BaTiO3@carbon microspheres can be easily tailored by manipulating the relative content of carbon shells. It is confirmed that dielectric loss of these composites mainly benefits from conductivity loss, dipole orientation polarization, and interfacial polarization, and the core-shell configuration shows its positive contribution to the reinforcement of interfacial polarization. When the content of carbon shells is optimized, the as-obtained composite will display excellent microwave-absorption performance due to decent attenuation and well-matched impedance. The strongest reflection loss can reach up to -88.5 dB at 6.9 GHz with the absorber thickness of 3.0 mm, and the qualified bandwidth below those of most typical binary dielectric systems. More importantly, these BaTiO3@carbon microspheres maintain good performance after being treated under high-temperature and acidic conditions for a long time, manifesting their promising prospect for practical application. It is believed that these results may be helpful for the development of multicomponent dielectric systems as high-performance microwave absorbing materials.
机译：二元介电复合材料被视为用于微波吸收领域的传统磁性材料的一种有希望的候选者。在此，我们通过空间限制策略证明了核心壳BATIO3碳微球的成功制造。通过操纵碳壳的相对含量，可以容易地定制BATIO3碳微球的电磁特性。确认这些复合材料的介电损耗主要有利于电导率损失，偶极方向极化和界面偏振，并且核心壳配置显示其对界面极化的加强的积极贡献。当优化碳壳的含量时，通过体面的衰减和匹配良好的阻抗，可以获得的AS获得的复合材料将显示出优异的微波吸收性能。最强烈的反射损耗可以在6.9 GHz中达到高达-88.5 dB，吸收厚度为3.0 mm，以及最典型的二元电介质系统的合格带宽。更重要的是，这些BATIO3 @碳微球长时间在高温和酸性条件下处理后保持良好的性能，表现出他们对实际应用的有希望的前景。据信这些结果可能有助于多组分电介质系统作为高性能微波吸收材料的发展。

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  • 来源
    《ACS applied materials & interfaces》 |2019年第34期|共9页
  • 作者

    Cui Liru; Tian Chunhua; Tang Linlong; Han Xijiang; Wang Yahui; Liu Dawei; Xu Ping; Li Chaolong; Du Yunchen;

  • 作者单位

    Harbin Inst Technol Sch Chem &

    Chem Engn MIIT Key Lab Crit Mat Technol New Energy Convers Harbin 150001 Heilongjiang Peoples R China;

    Lingnan Normal Univ Sch Phys Sci &

    Technol Zhanjiang 524048 Peoples R China;

    Chinese Acad Sci Chongqing Inst Green &

    Intelligent Technol Chongqing 400714 Peoples R China;

    Harbin Inst Technol Sch Chem &

    Chem Engn MIIT Key Lab Crit Mat Technol New Energy Convers Harbin 150001 Heilongjiang Peoples R China;

    Harbin Inst Technol Sch Chem &

    Chem Engn MIIT Key Lab Crit Mat Technol New Energy Convers Harbin 150001 Heilongjiang Peoples R China;

    Harbin Inst Technol Sch Chem &

    Chem Engn MIIT Key Lab Crit Mat Technol New Energy Convers Harbin 150001 Heilongjiang Peoples R China;

    Harbin Inst Technol Sch Chem &

    Chem Engn MIIT Key Lab Crit Mat Technol New Energy Convers Harbin 150001 Heilongjiang Peoples R China;

    Chinese Acad Sci Chongqing Inst Green &

    Intelligent Technol Chongqing 400714 Peoples R China;

    Harbin Inst Technol Sch Chem &

    Chem Engn MIIT Key Lab Crit Mat Technol New Energy Convers Harbin 150001 Heilongjiang Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    BaTiO3@carbon microspheres; core-shell configuration; interfacial polarization; microwave absorption; durable performance;

    机译：BATIO3 @碳微球;核心壳配置;界面极化;微波吸收;耐用性能;

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