中国物理B ›› 2023, Vol. 32 ›› Issue (5): 54202-054202.doi: 10.1088/1674-1056/aca7f1
Liang Qiao(乔亮)1,†, Cheng-Fa Tu(涂成发)1, Wei Wu(吴伟)1, Wen-Biao Wang(王文彪)1, Sheng-Yu Yang(杨晟宇)1, Sun Zhe(孙哲)1, Peng Wu(吴鹏)1, Jin-Bo Yang(杨金波)2, Chang-Sheng Wang(王常生)2, Tao Wang(王涛)1, and Fa-Shen Li(李发伸)1
Liang Qiao(乔亮)1,†, Cheng-Fa Tu(涂成发)1, Wei Wu(吴伟)1, Wen-Biao Wang(王文彪)1, Sheng-Yu Yang(杨晟宇)1, Sun Zhe(孙哲)1, Peng Wu(吴鹏)1, Jin-Bo Yang(杨金波)2, Chang-Sheng Wang(王常生)2, Tao Wang(王涛)1, and Fa-Shen Li(李发伸)1
摘要: Intermetallic complexes of rare-earth and 3d transition metals with core-shell structures are commonly employed as microwave absorbing materials due to their high saturation magnetizations and natural resonance in GHz. Hence, we synthesized Y2Co17 alloy via the co-precipitation reduction-diffusion technique, then coated the Y2Co17 magnetic powders with SiO2 to create Y2Co17@SiO2 core-shell structures. The formation of Y2Co17@SiO2/polyurethane (PU) at various volume fractions and their magnetic, electromagnetic properties were investigated using x-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, and vector network analyzer. The microwave absorption characteristics of Y2Co17@SiO2/PU were also investigated at various volume fractions. We not only investigate the zero-reflection conditions of the samples with different volume fractions, but also show that every absorber has a strong reflection loss value (RL ≤ -65.00 dB) and excellent microwave absorption properties with an average RL of Y2Co 17@SiO2/PU being below -10 dB at 8 GHz-18 GHz under different thicknesses, showing that the enhancement of microwave absorption performance arises from the balance between permeability and permittivity of absorber.
中图分类号: (Wave propagation, transmission and absorption)