Scholarlink

<p>Conventional microwave-absorbing materials struggle to meet modern demands for ‘thinness, light weight, wide bandwidth, and strong absorption’ in complex electromagnetic environments. Furthermore, emerging applications require new functionalities, specifically low-frequency absorption and multi-band response. To address these challenges, this work designs and constructs a multi-mechanism synergistic absorbing system based on a rare earth-transition metal Y-Co (Y<sub>2</sub>Co<sub>17</sub>) alloy. The system is fabricated via heterogeneous deposition and thermal treatment to obtain ZnO@YCo composites. The results offer significant implications for the development of low-frequency and multi-band electromagnetic wave-absorbing materials. The main research contents and findings are as follows: A heterogeneous deposition method was employed to introduce needle-like ZnO heterostructures on the surface of YCo particles, followed by thermal treatment to optimize the absorption performance of ZnO@YCo composites. By adjusting the heat treatment temperature, the ZnO morphology was tuned. At 300&#xa0;°C, the ZnO coating exhibited a well-defined structure with minimal agglomeration. The material demonstrated enhanced low-frequency absorption while retaining good performance in the high-frequency range (14–18&#xa0;GHz). At a thickness of 6&#xa0;mm, the minimum RL of ZnO@YCo reached − 5.86&#xa0;dB at 5.6&#xa0;GHz, outperforming the pristine YCo powders (RL &gt; − 2.5&#xa0;dB), thus exhibiting promising low-frequency absorption capabilities.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Fabrication and microwave absorption properties of ZnO@YCo core–shell composites

  • 期刊论文

  • 发表日期：

    2026年2月28日

查看全文
  • Xiaoyuan Li,
  • Guosong Zhu,
  • Wenqian Pan,
  • Wei Zhou,
  • Yuhai Lu,
  • Jing Yue,
  • Peng Xiao,
  • Heng Luo,
  • Yang Li

摘要

Conventional microwave-absorbing materials struggle to meet modern demands for ‘thinness, light weight, wide bandwidth, and strong absorption’ in complex electromagnetic environments. Furthermore, emerging applications require new functionalities, specifically low-frequency absorption and multi-band response. To address these challenges, this work designs and constructs a multi-mechanism synergistic absorbing system based on a rare earth-transition metal Y-Co (Y2Co17) alloy. The system is fabricated via heterogeneous deposition and thermal treatment to obtain ZnO@YCo composites. The results offer significant implications for the development of low-frequency and multi-band electromagnetic wave-absorbing materials. The main research contents and findings are as follows: A heterogeneous deposition method was employed to introduce needle-like ZnO heterostructures on the surface of YCo particles, followed by thermal treatment to optimize the absorption performance of ZnO@YCo composites. By adjusting the heat treatment temperature, the ZnO morphology was tuned. At 300 °C, the ZnO coating exhibited a well-defined structure with minimal agglomeration. The material demonstrated enhanced low-frequency absorption while retaining good performance in the high-frequency range (14–18 GHz). At a thickness of 6 mm, the minimum RL of ZnO@YCo reached − 5.86 dB at 5.6 GHz, outperforming the pristine YCo powders (RL > − 2.5 dB), thus exhibiting promising low-frequency absorption capabilities.