气凝胶改性石英纤维增强有机硅透波复合材料性能  

Properties of Aerogel Modified Quartz Fiber Reinforced Silicone Wave-transparent Composites

作　　者：孔国强 王康 于秋兵 李莹 魏化震 邵蒙 毕卫东 刘本学 尹磊 孙晓冬 KONG Guoqiang;WANG Kang;YU Qiubing;LI Ying;WEI Huazhen;SHAO Meng;BI Weidong;LIU Benxue;YIN Lei;SUN Xiaodong(Shandong Non-metallic Materials Institute,Jinan 250031,Shandong,China;Advanced Materials Institute,Qilu University of Technology(Shandong Academy of Science),Jinan 250014,Shandong,China)

机构地区：[1]山东非金属材料研究所,山东济南250031 [2]齐鲁工业大学(山东省科学院)新材料研究所,山东济南250014

出　　处：《兵工学报》2022年第2期442-450,共9页Acta Armamentarii

摘　　要：以SiO_(2)气凝胶、Al_(2)O_(3)气凝胶、ZrO_(2)气凝胶为改性剂、甲基苯基有机硅树脂为基体,石英纤维布为增强材料,制备了气凝胶改性石英/有机硅复合材料。开展热重分析、动态热机械分析、力学性能测试、介电性能、扫描电子显微镜等测试实验,研究不同气凝胶改性对石英/有机硅复合材料的热性能、力学性能和介电性能的影响。结果表明:气凝胶的加入提升了石英/有机硅复合材料的热稳定性和力学性能,其中Al_(2)O_(3)气凝胶使复合材料的力学强度提高最多,其压缩强度和弯曲强度分别为145 MPa和192 MPa,较未改性时分别提高了122%和81%;气凝胶的加入使石英/有机硅复合材料的介电常数增大,但仍均低于3.5,介电损耗角正切值均小于0.01,保持了较好的介电性能。Quartz/silicone composites were prepared by using SiO_(2) aerogels,Al_(2)O_(3) aerogels and ZrO_(2) aerogels as modifiers,methyl phenyl silicone resin as matrix,and quartz fiber as reinforcing material.Thermogravimetric analysis,dynamic thermomechanical analysis,mechanical properties test,dielectric properties test and SEM test were made for quartz/silicone composite.The effects of different aerogel modifications on the thermal,dielectric and mechanical properties of quartz/silicone composite were studied.The results show that the thermal stability and mechanical properties of quartz/silicone composite increase with the addition of aerogels.Al_(2)O_(3) aerogels increase the mechanical strength of composites.The compressive strength and flexural strength of quartz/silicone composites are 145 MPa and 192 MPa,respectively,which are increased by 122%and 81%compared with unmodified composite.The dielectric constant of quartz/silicone composites increases with the addition of aerogels,but their dielectric constants are all less than 3.5 and their dielectric loss tangents are less than 0.01.

关 键 词：透波复合材料 气凝胶 有机硅树脂 力学性能 介电性能 

分 类 号：TB332[一般工业技术—材料科学与工程]