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《Bulletin of the Chinese Ceramic Society》 2016-02
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Transparent Silica Aerogel Prepared by Improving the Two Steps

LIU Wen-yang;LUO Xuan;CAO Lin-hong;FANG Yu;YANG Rui-zhuang;ZHANG Qing-jun;JIANG Xiao-dong;School of Materials Science and Engineering,Southwest University of Science and Technology;Research Center of Laser Fusion,CAEP;Joint Laboratory for Extreme Conditions Matter Properties,Southwest University of Science and Technology and Research Center of Laser of Laser Fusion,CAEP;  
The highly transparent silica aerogels were successfully prepared by sol-gel process and subsequently supercritical drying with carbon dioxide. Tetramethyl orthosilicate was used as Si source,methyl and N,N-Dimethylformamide was used as solvent. The structures and optical properties of the silica aerogel were characterized by SEM,BET and UV. The results indicated that the sample possessed three-dimensional nano porous structure,with average pore size of 15. 16 nm and specific surface area of922. 1 m2/ g. The transmittance of the sample which had a thickness of 0. 4 cm was up to 92. 4% at the wavelength of 800 nm. With its high transmittance,this kind of silica aerogels has a potential application in the field of solar collector.
【Fund】: 中国工程物理研究院科学技术发展项目基金(2015B0302071);中国工程物理研究院发展基金项目(2013A0302016);; 西南科技大学重点科研平台专职科研创新团队建设基金项目(14tdjk04);; 2013年四川省学术与技术带头人培养资金资助
【CateGory Index】: TQ127.2;TQ427.26
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