碳纤维增强水泥基复合材料的电磁屏蔽性能  

The Electromagnetic Interference of Carbon Fiber Reinforced Cement-based Composites

作　　者：王闯[1] 李克智[2] 李贺军[2] 郭领军[2] 

机构地区：[1]陕西铁路工程职业技术学院道桥系,陕西渭南714000 [2]西北工业大学材料学院,陕西西安710072

出　　处：《精细化工》2008年第6期536-540,544,共6页Fine Chemicals

基　　金：国家自然科学基金项目(50172039)~~

摘　　要：利用弓形法测试了碳纤维质量掺量分别为0.2%、0.4%、0.6%、0.8%和1.0%时,碳纤维增强水泥基复合材料（CFRC）在低频段4～8 GHz和高频段8～18 GHz对电磁波的反射率,讨论了碳纤维质量掺量变化对反射率的影响。结果发现,碳纤维质量掺量相同、低频段时,反射率小于-10 dB,复合材料对电磁波表现出吸收性;高频段时,反射率大于-10 dB,复合材料对电磁波表现出反射性。低频段、碳纤维质量掺量为0.6%时出现最小反射率-15.1 dB;高频段、碳纤维质量掺量为0.4%时,出现最小反射率-19.4 dB。The reflectivity of carbon fiber reinforced cement-based composites （CFRC） against electromagnetic waves in the ranges of 4 - 8 GHz and of 8 - 18 GHz were measured using the Naval Research Laboratory system when the mass fractions of carbon fiber were 0. 2% ,0. 4% ,0. 6% ,0. 8% and 1. 0% respectively. The influence of carbon fiber contents on the reflectivity was discussed. Results showed that the reflectivity of the composites was less than - 10 dB at the lower frequency range and there were wave-absorbing properties. However, the reflectivity was more than - 10 dB at the higher range and there were wave-reflecting properties. At the lower frequency range, the minimum reflectivity was -15. 1 dB when the fiber content was 0. 6% ,whereas at the higher frequency range the minimum reflectivity was - 19.4 dB when the fiber content was 0. 4%.

关 键 词：碳纤维 水泥基 电磁波 反射率 

分 类 号：TB332[一般工业技术—材料科学与工程]