TY - JOUR
T1 - Highly anisotropic Fe3C microflakes constructed by solid-state phase transformation for efficient microwave absorption
AU - Zhao, Rongzhi
AU - Gao, Tong
AU - Li, Yixing
AU - Sun, Zhuo
AU - Zhang, Zhengyu
AU - Ji, Lianze
AU - Hu, Chenglong
AU - Liu, Xiaolian
AU - Zhang, Zhenhua
AU - Zhang, Xuefeng
AU - Qin, Gaowu
N1 - Publisher Copyright:
© The Author(s) 2024.
PY - 2024/12
Y1 - 2024/12
N2 - Soft magnetic materials with flake geometry can provide shape anisotropy for breaking the Snoek limit, which is promising for achieving high-frequency ferromagnetic resonances and microwave absorption properties. Here, two-dimensional (2D) Fe3C microflakes with crystal orientation are obtained by solid-state phase transformation assisted by electrochemical dealloying. The shape anisotropy can be further regulated by manipulating the thickness of 2D Fe3C microflakes under different isothermally quenching temperatures. Thus, the resonant frequency is adjusted effectively from 9.47 and 11.56 GHz under isothermal quenching from 700 °C to 550 °C. The imaginary part of the complex permeability can reach 0.9 at 11.56 GHz, and the minimum reflection loss (RLmin) is −52.09 dB (15.85 GHz, 2.90 mm) with an effective absorption bandwidth (EAB≤−10 dB) of 2.55 GHz. This study provides insight into the preparation of high-frequency magnetic loss materials for obtaining high-performance microwave absorbers and achieves the preparation of functional materials from traditional structural materials.
AB - Soft magnetic materials with flake geometry can provide shape anisotropy for breaking the Snoek limit, which is promising for achieving high-frequency ferromagnetic resonances and microwave absorption properties. Here, two-dimensional (2D) Fe3C microflakes with crystal orientation are obtained by solid-state phase transformation assisted by electrochemical dealloying. The shape anisotropy can be further regulated by manipulating the thickness of 2D Fe3C microflakes under different isothermally quenching temperatures. Thus, the resonant frequency is adjusted effectively from 9.47 and 11.56 GHz under isothermal quenching from 700 °C to 550 °C. The imaginary part of the complex permeability can reach 0.9 at 11.56 GHz, and the minimum reflection loss (RLmin) is −52.09 dB (15.85 GHz, 2.90 mm) with an effective absorption bandwidth (EAB≤−10 dB) of 2.55 GHz. This study provides insight into the preparation of high-frequency magnetic loss materials for obtaining high-performance microwave absorbers and achieves the preparation of functional materials from traditional structural materials.
UR - http://www.scopus.com/inward/record.url?scp=85185404462&partnerID=8YFLogxK
U2 - 10.1038/s41467-024-45815-w
DO - 10.1038/s41467-024-45815-w
M3 - 文章
C2 - 38374257
AN - SCOPUS:85185404462
SN - 2041-1723
VL - 15
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 1497
ER -