化学镀钴活性炭的微波吸收性能研究  

Study on the Microwave Absorbing Property of Composite Material Containing Active Carbon with Co Coating

作　　者：於留芳[1] 

机构地区：[1]南京师范大学泰州学院,江苏泰州225300

出　　处：《化工时刊》2008年第10期4-6,33,共4页Chemical Industry Times

摘　　要：采用化学镀的方法对活性炭进行表面镀钴，透射电镜（TEM）观察证实了活性炭的表面上已经镀覆上了钴层。采用HP8722ES矢量网络分析仪测量了样品在2—18GHz频率范围内的复介电常数（εT=ε＇-jε＇＇）和复磁导率（μT=μ＇-μ＇＇）。用吸收屏理论公式计算其反射损耗（R．L．）、匹配厚度（dm）及匹配频率（fm）。结果表明，随着匹配厚度的增大，吸收峰没有发生移动，但吸收峰值有所下降。在匹配厚度dm=0．2mm时，样品最大反射损耗达-5．23dB，对应的匹配频率fm=10．59GHz，而且在整个电磁波频率测试范围内，反射损耗值均小于-4．8dB。By electroless plating, cobalt was deposited respectively on the surface of active carbon. The cobalt coating on active carbon was characterized by transmission electron microscopy. And the complex relative permittivity （εT=ε＇-jε＇＇） and permeability （μT=μ＇-μ＇＇） of the active carbon/paraffin composite absorber were measured in a frequency range from 2 - 18 GHz. The reflection loss （ R. L. ） matching thickness （dm） and matching frequency （fm） were calculated using the theory of the absorbing wall. With the increase of the matching thickness, the peak value of the reflection loss becomes smaller. When the matching thickness is 0.2 mm, the maximum reflection coefficient is about - 5.23 dB for the absorber, the corresponding matching frequency is 10.59 GHz. The reflection loss is below -4.8 dB through the whole frequency.

关 键 词：活性炭 化学镀 钴 

分 类 号：TQ424.1[化学工程]