三种纳米碳材料吸波涂层设计及性能
张泽洋
刘祥萱
郭磊
吴友朋
（第二炮兵工程学院，西安710025）
文摘对纳米炭黑(UC)、特导纳米炭黑(L6)、碳纳米管(CNT)三种材料在8~18GHz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来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，反射表减率在11.2~15GHz均优于-10dB吸收峰最大值，达到29.6dB。
关键调纳米碳材料，介电损耗，反射率，吸波性能
DesignandMicrowaveAbsorbingPropertiesofCarbon Nano-Materials Single-Layer Microwave Absorbers
Zhang Zeyang
LiuXiangxuan
WuYoupeng
(The Second Artillery Engineering College, Xi' an 710025)
Guo Lei
AbstractIn 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 CHz. The results show that the real and imaginary of the complex permittivity of the com-posites were increased with filler weight and the increasing rates of the real and imaginary part with respect to the filler weight were all different. These different rates have great effect on the thickness in the designing the single-layer mi-crowave absorbers. The match thickness of coating and the weight of filler were obtained by the Cole-Cole plot. When 20% mass fraction carbon nanotubes were used with coating thickness of 1.6 mm, the reflection loss is superior to 10 dB at 11.2 to 15 GHz and the maximum reflection loss can reach 29.6 dB.
Key wordsCarbon nanomaterials,Dielectric loss,ReflectivityMicrowave absorbing property
0引言
雷达波吸收涂层能否达到良好的吸收效果，合适吸收剂的选择和吸波涂层的设计是重中之重。在现有的各种电、磁损耗型的雷达波吸收剂中电损耗型吸波剂成为轻质雷达波的首选对象(1-3]。目前电损耗吸波剂研究较多的有纳米炭黑（UC）、特导纳米炭黑（L6）、碳纳米管（CNT）等纳米碳材料，以其导电性好、质量轻等优点被广泛地应用于吸收剂的设计中[4-7]。本文通过三种纳米碳材料的复介电常数寻
收稿日期：2010-12-01
找吸波涂层设计的最佳条件，利用编程求解了一定频率条件下，不同厚度时最优的复介电常数；讨论了复
介电常数实部与虚部对匹配厚度的影响。 1实验
U型纳米炭黑（德国德固萨公司）、碳纳米管（南昌太阳纳米技术有限公司）、L6型特导纳米炭黑（德国德固萨公司），使用前需经过清洗、烘干处理。
根据测试要求，将三种纳米粉体分别与石蜡按一定比例混合制成内径3mm，外径7mm，厚度为2~4
作者简介：张泽详，1982年出生，博士，主要从事雷达波吸收材料的研究。Email：ayoungstudy@163.com
宇航材料工艺http://www.yhclgy.com2011年第4期万方数据
-11-