Effect of Misch-metal content on microwave absorption property of Ce2Co17 alloy

Liu, Yong-he; Pan, Shunkang; Cheng, Lichun; Yu, Jen‐te; Huang, Lei

doi:10.1007/s10854-020-03668-1

Cited by 9 publications

(1 citation statement)

References 24 publications

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“…Figure 7 shows the EM wave absorption properties of HEO−Zn, HEO−Cu, HEO−Mn spinel ferrites, which were also listed in Table 2, as well as those of man ported wave absorption materials [42][43][44][45][46]. It is noteworthy that all the HE spinel fe in the present work possess considerable minimum reflection loss (RLmin) and signific enhanced effective absorption bandwidth (EAB) in comparison with the other wav sorption materials.…”

Section: Wave Absorption Properties and Mechanismmentioning

confidence: 79%

High-Entropy Spinel Ferrites with Broadband Wave Absorption Synthesized by Simple Solid-Phase Reaction

et al. 2023

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In this work, high-entropy (HE) spinel ferrites of (FeCoNiCrM)xOy (M = Zn, Cu, and Mn) (named as HEO-Zn, HEO-Cu, and HEO-Mn, respectively) were synthesized by a simple solid-phase reaction. The as-prepared ferrite powders possess a uniform distribution of chemical components and homogeneous three-dimensional (3D) porous structures, which have a pore size ranging from tens to hundreds of nanometers. All three HE spinel ferrites exhibited ultrahigh structural thermostability at high temperatures even up to 800 °C. What is more, these spinel ferrites showed considerable minimum reflection loss (RLmin) and significantly enhanced effective absorption bandwidth (EAB). The RLmin and EAB values of HEO-Zn and HEO-Mn are about −27.8 dB at 15.7 GHz, 6.8 GHz, and −25.5 dB at 12.9 GHz, 6.9 GHz, with the matched thickness of 8.6 and 9.8 mm, respectively. Especially, the RLmin of HEO-Cu is −27.3 dB at 13.3 GHz with a matched thickness of 9.1 mm, and the EAB reaches about 7.5 GHz (10.5–18.0 GHz), which covers almost the whole X-band range. The superior absorbing properties are mainly attributed to the dielectric energy loss involving interface polarization and dipolar polarization, the magnetic energy loss referring to eddy current and natural resonance loss, and the specific functions of 3D porous structure, indicating a potential application prospect of the HE spinel ferrites as EM absorbing materials.

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