中国物理B ›› 2022, Vol. 31 ›› Issue (8): 87504-087504.doi: 10.1088/1674-1056/ac5240

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Electromagnetic wave absorption properties of Ba(CoTi)xFe12-2xO19@BiFeO3 in hundreds of megahertz band

Zhi-Biao Xu(徐志彪)1, Zhao-Hui Qi(齐照辉)2, Guo-Wu Wang(王国武)1, Chang Liu(刘畅)1, Jing-Hao Cui(崔晶浩)1, Wen-Liang Li(李文梁)1, and Tao Wang(王涛)1,†   

  1. 1 Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China;
    2 The Institute of Effectiveness Evaluation of Flying Vehicle, Beijing 100089, China
  • 收稿日期:2021-11-23 修回日期:2022-01-22 接受日期:2022-02-07 出版日期:2022-07-18 发布日期:2022-07-23
  • 通讯作者: Tao Wang E-mail:wtao@lzu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11574122) and the Joint Fund of Equipment Pre-Research and Ministry of Education, China (Grant No. 6141A02033242).

Electromagnetic wave absorption properties of Ba(CoTi)xFe12-2xO19@BiFeO3 in hundreds of megahertz band

Zhi-Biao Xu(徐志彪)1, Zhao-Hui Qi(齐照辉)2, Guo-Wu Wang(王国武)1, Chang Liu(刘畅)1, Jing-Hao Cui(崔晶浩)1, Wen-Liang Li(李文梁)1, and Tao Wang(王涛)1,†   

  1. 1 Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China;
    2 The Institute of Effectiveness Evaluation of Flying Vehicle, Beijing 100089, China
  • Received:2021-11-23 Revised:2022-01-22 Accepted:2022-02-07 Online:2022-07-18 Published:2022-07-23
  • Contact: Tao Wang E-mail:wtao@lzu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11574122) and the Joint Fund of Equipment Pre-Research and Ministry of Education, China (Grant No. 6141A02033242).

摘要: The high-performance electromagnetic (EM) wave absorption material Ba(CoTi)$_{x}$Fe$_{12-2x}$O$_{19}$@BiFeO$_{3}$ was prepared by solid-state reaction, and its EM wave absorption properties were deeply studied. The results revealed that Ba(CoTi)$_{x}$Fe$_{12-2x}$O$_{19}$@BiFeO$_{3}$ could obtain excellent absorption properties in hundreds of megahertz by adjusting the Co$^{2+}$-Ti$^{4+}$ content. The best comprehensive property was obtained for $x=1.2$, where the optimal reflection loss ($RL$) value reaches $-30.42$ dB at about 600 MHz with thickness of 3.5 mm, and the corresponding effective absorption band covers the frequency range of 437 MHz-1 GHz. Moreover, the EM wave absorption mechanism was studied based on the simulation methods. The simulated results showed that the excellent EM wave absorption properties of Ba(CoTi)$_{x}$Fe$_{12-2x}$O$_{19}$@BiFeO$_{3}$ mainly originated from the internal loss caused by natural resonance, and the interface cancelation further improved the absorption properties and resulted in $RL$ peaks.

关键词: microwave absorption, M-type ferrite, high permeability, impedance matching

Abstract: The high-performance electromagnetic (EM) wave absorption material Ba(CoTi)$_{x}$Fe$_{12-2x}$O$_{19}$@BiFeO$_{3}$ was prepared by solid-state reaction, and its EM wave absorption properties were deeply studied. The results revealed that Ba(CoTi)$_{x}$Fe$_{12-2x}$O$_{19}$@BiFeO$_{3}$ could obtain excellent absorption properties in hundreds of megahertz by adjusting the Co$^{2+}$-Ti$^{4+}$ content. The best comprehensive property was obtained for $x=1.2$, where the optimal reflection loss ($RL$) value reaches $-30.42$ dB at about 600 MHz with thickness of 3.5 mm, and the corresponding effective absorption band covers the frequency range of 437 MHz-1 GHz. Moreover, the EM wave absorption mechanism was studied based on the simulation methods. The simulated results showed that the excellent EM wave absorption properties of Ba(CoTi)$_{x}$Fe$_{12-2x}$O$_{19}$@BiFeO$_{3}$ mainly originated from the internal loss caused by natural resonance, and the interface cancelation further improved the absorption properties and resulted in $RL$ peaks.

Key words: microwave absorption, M-type ferrite, high permeability, impedance matching

中图分类号:  (Magnetic oxides)

  • 75.47.Lx
78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))