文献类型：期刊文献

英文题名：Rapid ambient pressure drying preparation of bulk ZrO2-SiO2 aerogels with high thermal stability

作者：Han, Yuqing[1,2];Wu, Youqing[1];Huang, Sheng[1,2];Wang, Yuhao[3];Guan, Xuebo[3];Liang, Zijun[1,2];Ye, Xinlong[1,2]

机构：[1]East China Univ Sci & Technol, Minist Educ, Engn Res Ctr Resource Utilizat Carbon Containing W, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Coal Liquificat Gasificat & Utilizat, Shanghai 200237, Peoples R China;[3]Naicher New Mat Yingkou Co Ltd, Yingkou 115004, Peoples R China

年份：2024

卷号：50

期号：22

起止页码：48011

外文期刊名：CERAMICS INTERNATIONAL

收录：;EI(收录号：20243817063287);WOS:【SCI-EXPANDED(收录号:WOS:001338660100001)】；

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：Atmospheric pressure drying; Aerogel; ZrO2-SiO2; Rapid preparation; High-temperature thermal stability

摘要：In this study, the sol-gel stage co-precursor method was used to hydrophobically modify the gel and increase the content of alkali catalyst in the gel, thereby reducing the capillary force generated during ambient pressure drying and enhancing the strength of the gel skeleton. This improvement makes the gel skeleton structure not easy to destroy during the rapid drying process, thus greatly reducing the preparation time of atmospheric pressure drying, which could be as short as 10 h. It is worth mentioning that this method does not require extensive use of modifiers and organic solvents, so it has low cost, high efficiency, and broad industrial production application prospects. The experimental results show that the DDS/ZSA aerogel exhibits the lowest thermal conductivity (0.035 W m(-1) K-1) when the dilute ammonia content is 5 ml. However, it should be noted that too low or too high an amount of dilute ammonia will lead to a decrease in aerogel performance, so it needs to be controlled within the appropriate range. In addition, the prepared aerogel has excellent hydrophobic properties with a contact angle greater than 140 degrees and excellent thermal stability at 1000 degrees C, which can be used in harsh, humid, and high-temperature environments.