文献类型：期刊文献

英文题名：Synthesis of Al2O3-SiO2 aerogels modified by dimethyldiethoxysilane which owned superior thermal insulation performance and high-temperature thermal stability

作者：Liang, Zijun[1,2];Wu, Youqing[1,2];Huang, Sheng[1,2];Wu, Shiyong[1,2];Li, Zhen[1,2];Sun, Lei[1,2]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Resource Utilizat Carbon Containing W, Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Coal Liquificat Gasificat & Utilizat, Shanghai 200237, Peoples R China

年份：2026

卷号：690

外文期刊名：JOURNAL OF NON-CRYSTALLINE SOLIDS

收录：;EI(收录号：20262620976885);WOS:【SCI-EXPANDED(收录号:WOS:001808575200001)】；

基金：This work was supported by the key technologies program of the Yingkou Science and Technology Bureau [Item No. 2022JH3/0200003] .

语种：英文

外文关键词：Dimethyldiethoxysilane; Thermal conductivity; High-temperature thermal stability

摘要：Al2O3-SiO2 aerogels with superior thermal insulation performance and high-temperature thermal stability were prepared by using dimethyldiethoxysilane (DDS) as a modifier. The modified Al2O3-SiO2 aerogels exhibited a high specific surface areas of 629.1 m(2) /g and a low thermal conductivity of 0.0232 W & sdot;m(-1)K(-1), which showed that DDS can optimize microstructure of Al2O3-SiO2 aerogels and further enhance the thermal insulation performance. In addition, the introduction of DDS can inhibit the particles sintering and phase transformation of samples during high-temperature heating treatment, and then improve the thermal stability. After being heated at 1200 degrees C, the modified Al2O3-SiO2 aerogels still had a high specific surface area (177.3 m(2) /g) and a low thermal conductivity (0.0458 W & sdot;m(-1)K(-1)). In conclusion, this work holds considerable significance for improving the thermal insulation performance of Al2O3-SiO2 aerogels and enhancing their high-temperature thermal stability, providing a feasible method for their practical application in high-temperature thermal insulation fields.