University of Chinese Academy of Sciences , Beijing 100049, China.
Dongguan University of Technology , Dongguan 523808, China.
ACS Appl Mater Interfaces. 2017 Dec 6;9(48):42192-42199. doi: 10.1021/acsami.7b12504. Epub 2017 Nov 20.
Thin and flexible materials that can provide efficient electromagnetic interference (EMI) shielding are urgently needed, especially if they can be easily processed and withstand harsh environments. Herein, layer-structured Fe-Si-B/Ni-Cu-P metallic glass composites have been developed by simple electroless plating Ni-Cu-P coating on commercial Fe-Si-B metallic glasses. The 0.1 mm-thick composite shows EMI shielding effectiveness of 40 dB over the X-band frequency range, which is higher than those of traditional metals, metal oxides, and their polymer composites of larger thickness. Most of the applied electromagnetic waves are proved to be absorbed rather than bounced back. This performance originates from the combination of a superior soft magnetic property, excellent electrical conductivity, and multiple internal reflections from multilayer composites. In addition, the flexible composites also exhibit good corrosion resistance, high thermal stability, and excellent tensile strength, making them suitable for EMI shielding in harsh chemical or thermal environments.
急需能够提供高效电磁干扰 (EMI) 屏蔽的轻薄灵活材料，特别是如果它们可以易于加工并能承受恶劣环境。在此，通过在商业 Fe-Si-B 金属玻璃上简单地进行化学镀 Ni-Cu-P 涂层，制备了层状结构的 Fe-Si-B/Ni-Cu-P 金属玻璃复合材料。这种 0.1 毫米厚的复合材料在 X 波段频率范围内表现出 40 dB 的 EMI 屏蔽效能，高于传统金属、金属氧化物及其聚合物复合材料的更大厚度。证明大部分施加的电磁波被吸收而不是被反弹回来。这种性能源于优越的软磁性、优异的导电性以及多层复合材料的多次内部反射的结合。此外，柔性复合材料还表现出良好的耐腐蚀性、高热稳定性和优异的拉伸强度，使其适用于恶劣化学或热环境中的 EMI 屏蔽。
