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首页> 外文期刊>Journal of materials science >High-efficiency and ultra-thin electromagnetic wave absorption xAl_2O_3-(1 - x)Sr_(0.85)Gd_(0.15)TiO_3 ceramics in X-band
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High-efficiency and ultra-thin electromagnetic wave absorption xAl_2O_3-(1 - x)Sr_(0.85)Gd_(0.15)TiO_3 ceramics in X-band

机译：高效率和超薄电磁波吸收XAL_2O_3-（1 - X）SR_（0.85）GD_（0.15）TiO_3陶瓷在X波段中

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摘要

xAl_2O_3-(1 - x)Sr_(0.85)Gd_(0.15)TiO_3(x = 0.2, 0.3, 0.4, 0.5) ceramics were fabricated by hot-press sintering. Their phase composition, morphology, element compositions, conductivity, dielectric properties as well as microwave absorption performance were examined by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), multifunction digital four-probe meter and vector network analysis, respectively. The microwave absorption of the as-prepared xAl_2O_3-(l - x)Sr_(0.85)Gd_(0.15)TiO_3 ceramics demonstrates excellent microwave absorbability. It is unexpectedly found that with a thickness of only 0.346 mm, xAl_2O_3-O - x)Sr_(0.85)Gd_(0.15)TiO_3 (x = 0.2) ceramic exhibits an absorption bandwidth of 3.7 GHz (8.7-12.4 GHz), being consequential to reflection loss less than - 10 dB (over 90% of microwave absorption). It is as well discovered that the minimum reflection loss and absorption peak frequency of xAl_2O_3-(1 - x)Sr_(0.85)Gd_(0.15)TiO_3 (x = 0.3) with a thickness of 0.436 mm were - 45.43 dB and 11.3 GHz, respectively. The prominent microwave absorption performance of the ceramic with such a thin thickness can be attributed to strong interfacial polarization, dielectric frequency dispersion, and good electromagnetic impedance matching. It indicates that the xAl_2O_3-(1 - x)Sr_(0.85)Gd_(0.15)TiO_3 ceramics with appropriate Al_2O_3 mass fraction and thickness showing good potential for effective microwave absorbing materials.
机译：通过热压烧结制造XAL_2O_3-（1 - X）SR_（0.85）GD_（0.15）GD_（0.15）TiO_3（x = 0.2,0.3,0.4,0.5）陶瓷。通过X射线衍射（XRD），扫描电子显微镜（SEM），能量分散光谱（EDS），多功能数字四探针计检查它们的相位成分，形态，元件组合物，电导率，电介质性能以及微波吸收性能，以及微波吸收性能。和矢量网络分析。制备的XAL_2O_3-（L-X）SR_（0.85）GD_（0.15）TiO_3陶瓷的微波吸收显示出优异的微波吸收性。意外地发现，厚度仅为0.346 mm，XAL_2O_3-O-X）SR_（0.85）GD_（0.15）TiO_3（x = 0.2）陶瓷表现出3.7GHz（8.7-12.4 GHz）的吸收带宽，是如此反射损耗小于 - 10 dB（超过90％的微波吸收）。还发现，XAL_2O_3-（1 - X）SR_（0.85）GD_（0.15）TiO_3（X = 0.3）的最小反射损耗和吸收峰值频率，厚度为0.436mm为-45.43dB和11.3 GHz，分别。具有这种薄厚度的陶瓷的突出微波吸收性能可归因于强的界面极化，介电频率分散和良好的电磁阻抗匹配。它表明XAL_2O_3-（1 - X）SR_（0.85）GD_（0.15）TiO_3陶瓷，具有适当的AL_2O_3质量分数和厚度，显示出有效微波吸收材料的良好潜力。

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  • 来源
    《Journal of materials science》 |2020年第19期|16178-16188|共11页
  • 作者

    Hui Xie; Chaoqun Yang; Yingying Zhou; Zhaowen Ren; Ping Liu;

  • 作者单位

    School of Materials Engineering Xi'an Aeronautical University Xi'an 710077 People's Republic of China School of Materials Science and Engineering Xi'an Technological University Xi'an 710021 People's Republic of China;

    School of Materials Science and Engineering Xi'an Technological University Xi'an 710021 People's Republic of China;

    School of Materials Engineering Xi'an Aeronautical University Xi'an 710077 People's Republic of China;

    School of Materials Science and Engineering Northwestern Polytechnical University Xi'an 710072 People's Republic of China;

    School of Materials Science and Engineering Xi'an Technological University Xi'an 710021 People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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