硅酸盐通报2018，Vol.37Issue(1)：221-224,4.
溶胶凝胶法制备SiO2气凝胶/石英纤维增强石英复合材料及其性能表征
Characterization of SiO2 Aerogel/SiO2 Fiber Composites Prepared by Sol-gel Method
张训虎 1翟萍 1栾强 1张庆利 2孙成功 1李红斌1
作者信息
- 1. 山东工业陶瓷研究设计院有限公司,淄博 255031
- 2. 空军驻山东地区军事代表室,济南 250101
- 折叠
摘要
Abstract
SiO2fiber reinforced SiO2ceramic composites filled with nano-sized SiO2were prepared by sol-gel method with vacuum impregnation, supercritical drying and surface modification.The silica sol for vacuum impregnated were prepared with tetraethyl orthosilicate(TEOS), anhydrous ethanol, water and acid catalyst as the starting materials.The water adsorption rate, apparent porosity and electrical properties of composites were investigated by means of archimedes method and waveguide method while the surface area and pore size of the aerogel samples were tested by BET, the mechanism of hydrophobicity was also discussed.The results show that the moisture absorption rate of products decreases to 1.21%from 17.36% that without filled with nano-sized SiO2, with a decreasing range of 93%.Additional coating could make the rate even as low as 0.052%.The dielectric constant has no significant change while the loss tangent decreased,with a decreasing range of 51.2%.关键词
气凝胶/石英纤维复合材料/吸湿率/介电性能Key words
aerogel/SiO2fiber reinforced SiO2ceramic composite/moisture absorption rate/dielectric property引用本文复制引用
张训虎,翟萍,栾强,张庆利,孙成功,李红斌..溶胶凝胶法制备SiO2气凝胶/石英纤维增强石英复合材料及其性能表征[J].硅酸盐通报,2018,37(1):221-224,4.
