FeCuNbSiB磁性纤维复合材料的动态电磁参数研究

Studies on Dynamic Electromagnetic Parameters of FeCuNbSiB Magnetic Fibre Composites

摘要:

采用熔体快淬工艺制备了FeCuNbSiB合金纤维并对静磁特性与微观结构进行了研究。在X波段（8．2GHz-12．4GHz）研究了这类纤维与环氧树脂复合后的动态电磁参数。在频率为2GHz～4GHz范围内讨论了不同掺入量对常规颗粒吸收剂动态电磁参数的影响规律。结果表明：在X波段，FeCuNbSiB磁性纤维复合材料的动态电磁参数具有明显的各向异性；在常规颗粒吸收剂中适量掺入这类纤维，可有效地改善其微波电磁参数。

Abstract:

The static magnetic characteristics and microstructures of FeCuNbSiB fibres fabricated by the melt spun process, have been studied in this paper. The electromagnetic parameters (relative complex permittivity and permeability) of the composite have been also investigated using fibres heat treated at 673 K for 1 h in X band (8.2 GHz~12.4 GHz). In the range of 2 GHz~4 GHz, the effect of the content of the randomly oriented fibres in the composites (fibres + spherical magnetic particles + epoxy) on the electromagnetic parameters has been studied. The results show that the electromagnetic parameters can be improved effectively with an appropriate content of FeCuNbSiB fibres.