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

doi:10.3969/j.issn.1000-1093.2022.02.022

Abstract

Abstract: Quartz/silicone composites were prepared by using SiO₂ aerogels, Al₂O₃ aerogels and ZrO₂ 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. Al₂O₃ 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.

Key words: wave-transparentcomposite, aerogel, siliconeresin, mechanicalproperty, dielectricproperty

CLC Number:

TB332

KONG Guoqiang, WANG Kang, YU Qiubing, LI Ying, WEI Huazhen, SHAO Meng, BI Weidong, LIU Benxue, YIN Lei, SUN Xiaodong. Properties of Aerogel Modified Quartz Fiber Reinforced Silicone Wave-transparent Composites[J]. Acta Armamentarii, 2022, 43(2): 442-450.

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