三种纳米碳材料吸波涂层设计及性能

对纳米炭黑(UC)、特导纳米炭黑(L6)、碳纳米管(CNT)三种材料在8～18 GHz波段吸波涂层进行了优化设计及吸波性能分析.结果表明,三种材料的复介电常数随着纳米碳材料质量分数的增加,其实部和虚部均以不同的速度增大.利用理论计算的Cole-Cole图,结合实验测得的复介电常数,求解出这三种材料理想的介电常数,材料的质量分数和吸波涂层的匹配厚度.结果表明,CNT的吸波效果最好,当CNT质量分数为20％涂层、厚度为1.6mm时,反射衰减率在11.2～ 15 GHz均优于-10 dB吸收峰最大值,达到29.6 dB.

Design and Microwave Absorbing Properties of Carbon Nano Materials Single Layer Microwave Absorbers

In this paper,the microwave absorption properties of three different types of carbon nano-materials such as U carbon,carbon nanotube and carbon black have been studied at the frequency band of 8 to 18 GHz.The complex permittivity of carbon nano-materials/paraffin composite with different weight fractions were measured at the frequency band of 8 to 18 GHz.The results show that the real and imaginary of the complex permittivity of the composites were increased with filler weight and the increasing rates of th...