铜镀层复合材料的吸波性能

Microwave absorption properties of copper coated composites

以2种织物材料为基材,采用化学镀铜的方法,进行铜镀层和吸波涂层复合材料的试验研究。分析了铜镀层的成分结构、织物种类、叠层顺序等因素对复合材料在9.35 GHz下反射率的影响规律,并探讨了铜镀层对吸波特性的影响机制。研究表明,对于织物基材先涂敷吸波涂层再化学镀铜的复合结构,与未氧化的铜镀层相比,空气中氧化8天的铜镀层使无纺布吸波复合材料的反射率峰值由-11 dB降低至-13.2 dB。对于织物基材先化学镀铜再涂敷吸波涂层的复合结构,40℃镀铜与常温镀铜相比,在反射率曲线峰值接近的情况下,吸波材料总厚度下降了约1.4 mm,说明铜镀层可用于改进吸波材料的微波吸收效果。

A new-style fabric radar absorbing material （RAM） composed of copper coating and absorbing coating was prepared on two fabrics. In order to analyze the effects of electroless copper coating on the microwave properties of the composite RAM, the copper coatings of various components, fabric with different conformations and multilayer structures were adopted. The results show that for the structure of the absorbing coating as the first layer and the copper coating as the second layer after electroless copper plating at room temperature, after air oxidation for 8 days, compared with initial copper-plating composite, the reflectivity of non-woven RAM with copper-plating decreases from -11 dB to -13.2 dB. For the structure of the copper coating as the first layer and the absorbing coating as the second layer, the whole thickness of the non-woven composite RAM after copper-plating at 40℃ reduces by 1.4 mm approximately, compared with that after copper plating at room temperature in the state of an adjacent reflectivity peak value. The results indicate that copper coating can be used to improve the microwave property of RAM.