羰基铁/环氧有机硅树脂涂层的吸波性能和力学性能研究

材料导报, 2009, 23(6): 1-4.

羰基铁/环氧有机硅树脂涂层的吸波性能和力学性能研究

卿玉长 ^1, , 周万城 ^2, , 罗发 ^3, , 朱冬梅 ^4,

1.西北工业大学凝固国家重点实验室,西安,710072

2.西北工业大学凝固国家重点实验室,西安,710072

3.西北工业大学凝固国家重点实验室,西安,710072

4.西北工业大学凝固国家重点实验室,西安,710072

基金项目: 国家自然科学基金(50572090)

关键词：吸波涂层 , 羰基铁 , 电磁参数 , 吸波性能 , 力学性能

Microwave Absorbing and Mechanical Properties of Carbonyl Iron/Epoxy-silicone Coating

采用羰基铁为吸收荆、环氧改性有机硅树脂为基体,制备了羰基铁/树脂基涂层,研究了羰基铁用量对吸波涂层的电磁和力学性能的影响.结果表明,羰基铁经过润湿分散剂处理后,粉体与树脂间的相容性得到改善,从而提高了界面结合力,因此吸波涂层整体的力学性能得到了提高.当羰基铁含量为70%(质量分数,下同)时,复合材料的附着力为22.16MPa,冲击强度大于或等于50kg·cm.采用同轴法测试了涂层材料在2～18GHz频段内的电磁参数,并对羰基铁/环氧有机硅树脂基涂层的反射系数进行了测试,结果表明,吸波涂层的最大吸收峰随吸收剂含量的增加向低频移动.涂层厚度为2mm时,羰基铁含量为65%,涂层的最大反射率在5.12GHz时达到-32.25dB;羰基铁含量为75%,在频率为3.53GHz时材料的反射率达到最大值-36.02dB.

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