【摘要】 以聚氨酯(PU)清漆为基体,制备了以羰基铁(CIP)和炭黑(CB)为吸收剂的微波吸收涂层。在8～18 GHz频率范围内,使用弓形法测量其反射损耗,分析了涂层的阻抗匹配情况,并采用不同吸收剂共混来提高吸波性能。所制备的涂层中,成分质量比(CB:CIP:PU)为0.1:3:1,厚度为1.1 mm,有效反射损耗(优于-4 dB)的频宽达到了4.3 GHz(12.1～16.4 GHz)。更多还原

【Abstract】 The microwave absorbing coatings have been prepared employing carbonyl-iron powder(CIP),carbon black(CB) as absorbents,and polyurethane(PU) varnish as matrix.The reflection loss(RL) of absorbing coatings have been measured in the range of 8～18 GHz via the arch method,the impedance matching of the coatings has been analyzed,and the absorbing properties have been improved by mixing different absorbents as well.For the sample with the mass ratio(CB:CIP:PU) of 0.1:3:1 and 1.1 mm thickness,the effective bandwidth(RL below-4 dB) achieved 4.3 GHz(12.1～16.4 GHz).更多还原