The absorbing properties of Fe73.5 Cu1Nb3Si13.5B9 amorphous powder/S-glass fiber-reinforced epoxy composite panels

• Published in: 稀有金属：英文版 Vol. 32; no. 3; pp. 294 - 298
• Main Author: Xia-Lian Zheng Zheng-Hou Zhu Xiao-Min Li
• Format: Journal Article
• Language: English
• Published: 2013
• Subjects: FeCuNbSiB; 复介电常数; 复合材料板; 微波吸收性能; 无定形粉末; 环氧树脂; 玻璃纤维; 频率范围
• ISSN: 1001-0521; 1867-7185

Fe73.5Cu1Nb3Si13.5B9 （or FeCuNbSiB） powder/ S-glass fiber-reinforced epoxy composite panels were pre- pared by mold pressing method. Metallographic analysis shows that the amorphous powders are evenly distributed between the layers of S-glass fibers. The effects of the Fe- CuNbSiB powder mass fraction on the complex permittivity, complex permeability, and microwave absorption of the composite panels have been studied in the frequency range of 2.6-18.0 GHz. The complex permittivity of the composite panels with different mass fractions of the FeCuNbSiB powders shows several peaks in the 2.6-18.0 GHz fre- quency range. The complex permeability of the composites decreases with the increasing frequency in the frequency range of 8-18 GHz. The composite with FeCuNbSiB/epoxy mass ratio of 2.5：1.0 has excellent microwave absorption properties of a minimum reflection loss value -30.5 dB at 10.93 GHz for a thickness of 2 mm. A reflection loss exceeding -10 dB can be obtained in a broad frequency range of 3.2-18.0 GHz with a thickness of 1.15-5.00 mm. For the FeCuNbSiB composites, the magnetic loss is the dominant term for microwave absorption. The FeCuNbSiB powders are a possible candidate for high-performance microwave absorption filler.