Microwave absorption properties of FeSiBNbCu glass-covered amorphous wires
Microwave absorption properties of FeSiBNbCu glass-covered amorphous wires
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DOI：
10.1016/s1003-6326(14)63385-9
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发表时间：
2014-08
影响因子：
4.5
通讯作者：
Xiao-Dong Wang;Jingshun Liu;F. Qin;Huan Wang;D. Xing;Jianfei Sun
中科院分区：
文献类型：
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作者：
Xiao-Dong Wang;Jingshun Liu;F. Qin;Huan Wang;D. Xing;Jianfei Sun
由不同填充率的玻璃覆盖Fe73组成的同轴介电样品。5 si13。制备了包埋在石蜡基体上的5B9Nb3Cu1非晶丝，在2 ~ 18 GHz微波频率范围内系统地研究了短丝填充率（质量分数3% ~ 9%）和厚度（1 ~ 7 mm）对其微波吸收性能的影响。采用x射线衍射（XRD）、差示扫描量热法（DSC）、扫描电镜（SEM）和标量网络分析仪（SNA）对其微观结构进行表征，并对其微波吸收性能进行评价。实验结果表明，复合相对磁导率和介电常数与频率（6 ~ 18 GHz）有显著的相关性。不同厚度和短线填充比下的反射损耗（RL）结果表明，含7%的复合材料样品在14 GHz时具有较好的微波吸收性能，在厚度为3 mm时，RL的最小值可达- 34 dB。因此，开发具有更宽吸收带的微线介质材料用于微波吸收具有重要意义。
Coaxially dielectric samples consisting of different packing ratios of glass-covered Fe73. 5Si13. 5B9Nb3Cu1 amorphous wires embedded in a paraffin wax matrix were fabricated, and the influence of short-wire packing ratio (3%–9% in mass fraction) and thickness (1–7 mm) on the microwave absorption properties was systematically investigated in microwave frequency range of 2–18 GHz. X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and scalar network analyzer (SNA) were used for characterizing microstructure and evaluating microwave absorption properties. Experimental results show the significant frequency (6–18 GHz) dependence of the complex relative permeability and permittivity. The reflection loss (RL) with different thickness and short-wire packing ratio reveals that the composite sample containing 7% exhibits better microwave absorption behavior with its minimum value of RL reaching− 34 dB in thickness of 3 mm at 14 GHz. Therefore, it is significantly useful to develop microwire-dielectric materials with much wider absorption band for microwave absorption applications.