以Sn-Pd胶体溶液为活化剂,对空心微球的表面进行活化,并采用化学镀工艺,在其表面分别镀Co和Co-Fe薄膜.利用扫描电子显微镜(SEM)、能量散射谱(EDs)和X-射线衍射仪(XRD)分别对镀膜前后的空心微球进行表征,用网络矢量分析仪测试镀膜后空心微球的电磁损耗和微波吸收性能.结果表明:经过活化后的空心微球表面分别淀积了均匀、致密的Co和Co-Fe薄膜.改性后的空心微球在2～18 GHz的频率范围内对电磁波有不同程度的吸收,具有宽频的吸收特性.
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