【作者】 刘立东； 段玉平； 陈利阳； 刘顺华；

【Author】 LIU Li-dong,DUAN Yu-ping,CHEN Li-yang,LIU Shun-hua (School of Materials and Engineering,Dalian University of Technology,Dalian 116085,China)

【机构】 大连理工大学材料科学与工程学院；

【摘要】 以环氧树脂为基体,制备了厚度为1.5mm羰基铁粉和炭黑的复合吸波涂层。分别对羰基铁粉和炭黑的电磁性能进行了测试和分析,并且考察了复合吸波涂层的性能,讨论了吸收剂含量对于吸波性能的影响。实验结果表明,羰基铁粉是一种优良的磁损耗吸波剂,而炭黑具有优良的介电损耗特性。无论增加羰基铁粉还是炭黑的含量均能使吸波涂层的吸收频带向低频方向移动,同时增加炭黑的含量有助于拓宽吸收频宽(反射率优于-4dB)。其中,含25%(质量分数)羰基铁粉,25%(质量分数)炭黑的试样,其吸收频带(反射率优于-4dB)的宽度达10.1GHz,频率范围为7.9～18GHz,表明其在X和Ku波段具有良好的吸收性能。更多还原

【Abstract】 The composite coating composed of carbonyl-iron powder(CIP) and carbon black(CB) with epoxy resin as matrix was prepared,and the thickness of coating was 1.5mm.The electromagnetic properties of CIP and CB were measured and analyzed,respectively.The microwave absorption properties of the composite coatings were investigated,and the effects of the absorbent content on the microwave absorption properties were discussed.The results showed that CIP was a good magnetic absorbent,and CB possessed excellent dielectric loss.Besides,the increase of carbonyl-iron powder or carbon black content made the absorption bands(reflection loss less than -4dB) move towards the lower frequency range,and the absorption band could be broadened by enhancing carbon black content.For the sample with 25 wt%CIP and 25 wt%CB,the absorption bandwidth achieved 10.1GHz in 7.9-18GHz frequency range,which indicated that the excellent microwave absorption properties of the composite coating were shown in the X and Ku bands.更多还原