作　　者： ; ; ; (洪田惺）; (郑日土）;

机构地区： 广东工业大学材料与能源学院

出　　处： 《电子元件与材料》 2013年第12期12-16,20,共6页

摘　　要： 采用还原金属氧化物包覆工艺制备了Fe-Co-Ni合金包覆玻璃微珠复合材料,利用SEM和XRD分别观察和分析了样品的形貌和物相结构。测试了碳纳米管和Fe-Co-Ni合金包覆玻璃微珠两种材料在微波频率为2～18GHz时的电磁参数。运用传输线理论计算了由这两种材料构成的双层涂层的微波反射率和阻抗。结果显示,Fe-Co-Ni合金均匀包覆在玻璃微珠表面;由这两种材料构成的厚度为2 mm的双层涂层的微波反射率在8～17 GHz时低于–10dB,双层涂层的吸波性能明显优于碳纳米管单层涂层。 Micro-glass beads （MGB） coated by Fe-Co-Ni alloys （MGB@Fe-Co-Ni） were synthesized through reduction of metal oxide coating on the surface of MGB. The morphologies and phases of the prepared composites were characterized by scanning electron microscopy and X-ray diffraction. The electromagnetic parameters of carbon nanotubes （CNTs） and MGB@Fe-Co-Ni composites in the microwave frequency of 2-18 GHz were measured, respectively. The microwave reflectivity and intrinsic impedance of the double-layer coatings consisting of CNTs and MGB@Fe-Co-Ni were calculated using transmission line theory. The results show that Fe-Co-Ni alloys are uniformly coated on the surface of MGB and the microwave reflectivity of the double-layer coating with thickness of 2 mm in 8-17 GHz is below -10 dB, and the microwave absorbing performance of double-layer coating is better than that of CNTs single-layer.

关 键 词： 玻璃微珠 电磁参数 阻抗匹配 碳纳米管 吸波性能

领　　域： [电气工程] [一般工业技术]