【摘要】 介绍了一种新型电磁功能材料.该材料由表面无电子镀镍的空心微球组成.采用扫瞄电镜观测了镀镍前后的表面微观结构,制备成样品放入X波段波导框中,在微波网络分析仪上进行散射参数测量,计算了电磁特性参数.结果表明,该材料在表面镀镍后取得了较高的磁导率(19.0)和磁损耗正切(0.6),而介电常数保持较低(1.8).与非金属化微球材料相比,可作为超薄型多层微波吸收材料的基本材料.更多还原

【Abstract】 This paper presents a new electromagnetic functional material developed by electron-less nickel deposition technique, with a single hollow micro-sphere as the core template and a thin nickel layer as the shell. The micrograph taken by a scanning electron microscope shows the microstructures of the materials in detail. Scattering parameters of the waveguide sample holder filled with the materials have been obtained over X band. The electromagnetic parameters computed from the measured S parameters show that the material with metallic hollow spheres has as high relative permeability μ’r as 19.0 with about 0.6 magnetic loss tangent over the whole bandwidth. Compared to the material with non-metallic spheres, the permeability μ’r and the magnetic loss tangent μ." increase greatly, while the permittivity remains lower than 1.8.更多还原