Ultralight Medium‐Entropy Alloy/CNT Aerogels With Synergistic Magnetoelectric Coupling for Enhanced Low‐Frequency Microwave Absorption
Ultralight Medium‐Entropy Alloy/CNT Aerogels With Synergistic Magnetoelectric Coupling for Enhanced Low‐Frequency Microwave Absorption
研究概述
通过燃烧及还原/催化生长制备NiCoFe中熵合金/CNT超轻气凝胶，密度32 mg/cm³。最小反射损耗−56.5 dB，有效吸收带宽5.2 GHz。XAS及微磁模拟支持短程有序影响局域磁各向异性、增强自旋弛豫损耗，结合多孔磁电耦合实现低频吸波。
谱图与表征信息
FIGURE 2 Physicochemical characterization of NCFT-3 aerogels. (a) Photograph of the ultralight property of the NCFT aerogel. (b) Elemental line-scan profile of a representative MEA nanoparticle. (c) X-ray diffraction (XRD) patterns of the NCFT series. (d) X-ray photoelectron spectroscopy (XPS) survey scans and (e) high-resolution Ni 2p spectra of the NCFO precursor and final NCFT product. (f) Ni K-edge X-ray absorption near-edge structure (XANES) spectra. (g) k3χ (k) Extended X-ray absorption fine structure (EXAFS) oscillations in k-space and (h) their corresponding Fourier transforms in R-space. (i) Wavelet transforms of Ni-NCFO and Ni-NCFT.