铁氧体水泥基微波吸收复合材料的初步研究  

Primary research on ferrite concrete based composite material for microwave absorption

作　　者：许卫东[1] 杨燚[1] 张豹山[1] 史莹冰[1] 陆怀先[1] 周宁生[1] 

机构地区：[1]南京大学物理系

出　　处：《兵器材料科学与工程》2003年第6期6-9,共4页Ordnance Material Science and Engineering

摘　　要：运用电磁场基本理论 ,研究混凝土—空气界面对微波的反射系数。当视水泥砂浆为无损耗电介质时 ,其对微波的反射系数绝对值接近于 1。以铁氧体吸收剂和水泥复合方法 ,制备具有微波吸收特性的混凝土 ,当吸收剂含量为 33% (质量分数 )时 ,厚度为 3mm的混凝土 ,对于频率为 8～ 12GHz的垂直入射电磁波 ,具有最小约 - 7dB ,最大 - 15dB的微波吸收性能。由于对电磁波反射能力的相对减弱 ,与水泥砂浆相比 ,含有吸收剂混凝土的电磁屏蔽效能有所下降。但这类材料在新型隐身型防护工程构筑。The microwave reflectance (MR) of the concrete atmosphere interface has been researched with electromagnetic field theory. If the concrete mortar is regarded as no-attenuation dielectric, its absolute value MR is about 1. The concrete with microwave absorption property has been prepared by compounding concrete with ferrite microwave absorbent (MA). The concrete with 33%Wt. MA has -7dB～-15dB microwave absorption, when the vertical incidence microwave frequency is 8～12GHz and the concrete mortar lever's thickness is about 3mm. Because of the MR decreases, the electromagnetic shielding effectiveness of the concrete with MA reduces a little. This type of concrete has potential application future in the research areas of new stealthy protective engineering construction, electromagnetic radiation pollution decrease as well as electromagnetic shielding.

关 键 词：铁氧体水泥基微波吸收复合材料 混凝土 电磁参数 电磁屏蔽 

分 类 号：TB33[一般工业技术—材料科学与工程] TU528[建筑科学—建筑技术科学]