Biomimetic Sea Urchin-like Nano-ferrite Structures for Microwave Absorption

作者：Chenzhi Zhang, Kailin Li, Tao Sun, Xiaoying Liu, Xingjian Dai, Quan Zhou, Dashuang Wang, Xinfang Zhang, Jiehang Ding, Xiaohan Huang, Jinsong Rao, Yi Hou, Pingan Yang, Kechen Liu, Yuxin Zhang · 发表于：ACS Applied Nano Materials · 年份：2024 · DOI：10.1021/acsanm.3c05360 · 被引用次数：47 · 研究领域：Electromagnetic wave absorption materials、Magnetic Properties and Synthesis of Ferrites、Advanced Antenna and Metasurface Technologies

Wideband absorption with low-frequency compatibility is always challenging for developing high-performance electromagnetic wave (EMW) absorbing materials. With magnetic loss and a sufficient polarization interface, ferrite materials are promising candidates for overcoming this challenge. To address impedance matching issues, a carrier material with a uniform pore distribution, namely, diatomite, is employed, resulting in a unique three-dimensional biomimetic structure. A biomimetic sea urchin-like nanomaterial composed of one-dimensional nanorod-shaped Fe 3 O 4 (sea urchin-like nano-Fe 3 O 4 ) is presented, demonstrating outstanding performance in EMW absorption. The optimized Fe 3 O 4 @FeP sample exhibits two absorption peaks spanning the C and Ku bands when the thickness is 5.35 mm. The experimental results show that the sea urchin-like nano-Fe 3 O 4 achieves an astounding reflection loss of −60 dB at 6 GHz with a thickness of 3.9 mm and a maximum effective absorption bandwidth of 4 GHz at a thickness of 1.7 mm. This material design holds significant potential for low-frequency EMW absorption applications.