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<p>To improve the wave-absorbing ability of ferrite, Ni<sub>0.62</sub>Zn<sub>0.38</sub>Gd<sub>0.01</sub>Yb<sub>x</sub>Fe<sub>1.95-x</sub>O<sub>4</sub> (x = 0, 0.02, 0.04, 0.06, 0.08, 0.1) wave-absorbing materials were prepared by solid-phase sintering method. In the present study, doping with Gd<sup>3+</sup> and Yb<sup>3+</sup> ions is introduced and the effects of varying the Yb<sup>3+</sup> ion content on the phase structure, microstructure, magnetic properties, and wave-absorbing properties of the materials are investigated in detail. X-ray diffraction shows that the samples are all spinel phases, scanning electron microscopy shows that the particles vary in the micrometer range, hysteresis curves show that an increase in the content of Yb<sup>3+</sup> ions decreases the saturation magnet intensity, and the analysis of the electromagnetic parameters shows that the Yb<sup>3+</sup> ions can effectively improve the dielectric constant and impedance matching, and the samples exhibit the optimal microwave absorption performance of RL<sub>min</sub> = −&#xa0;39.38&#xa0;dB when Yb<sup>3+</sup> = 0.06, and the maximum effective absorption width EAB<sub>max</sub> = 6.36&#xa0;GHz. This study reveals a clear link between the concentration of rare earth ions and the electromagnetic wave dissipation capacity, providing important information for the development of better electromagnetic wave absorbers.</p>

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Tailoring microwave absorption in Gd3+-immobilized ferrites through Yb3+ content engineering

  • 期刊论文

  • 发表日期：

    2025年6月14日

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  • Zhihao Geng,
  • Yujie Yang,
  • Hao Li,
  • Zhenyu Zhang,
  • Hongyu Ding

摘要

To improve the wave-absorbing ability of ferrite, Ni0.62Zn0.38Gd0.01YbxFe1.95-xO4 (x = 0, 0.02, 0.04, 0.06, 0.08, 0.1) wave-absorbing materials were prepared by solid-phase sintering method. In the present study, doping with Gd3+ and Yb3+ ions is introduced and the effects of varying the Yb3+ ion content on the phase structure, microstructure, magnetic properties, and wave-absorbing properties of the materials are investigated in detail. X-ray diffraction shows that the samples are all spinel phases, scanning electron microscopy shows that the particles vary in the micrometer range, hysteresis curves show that an increase in the content of Yb3+ ions decreases the saturation magnet intensity, and the analysis of the electromagnetic parameters shows that the Yb3+ ions can effectively improve the dielectric constant and impedance matching, and the samples exhibit the optimal microwave absorption performance of RLmin = − 39.38 dB when Yb3+ = 0.06, and the maximum effective absorption width EABmax = 6.36 GHz. This study reveals a clear link between the concentration of rare earth ions and the electromagnetic wave dissipation capacity, providing important information for the development of better electromagnetic wave absorbers.