期刊
CERAMICS INTERNATIONAL
卷 44, 期 13, 页码 15440-15445出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.05.199
关键词
ZrO2-SiO2 aerogels; Multiple impregnation; Mechanical property; Thermal property
资金
- National Natural Science Foundation of China [11672031, 11472038]
- Research Innovation Fund of Shenzhen City of China [JCYJ20170413104256729, JCYJ20170811160538023]
Novel self-reinforcing ZrO2-SiO2 aerogels with high mechanical strength and ultralow thermal conductivity are fabricated by impregnating hydrolyzed ZrO2-SiO2 sol into wet gel matrix and drying. The ZrO2-SiO2 sol fills the macropores and defects of ZrO2-SiO(2)aerogel matrix generating during the gelation process, which contributes to the improvement of the mechanical properties of the ZrO2-SiO(2)aerogel matrix. The mechanical and thermal properties of the as-prepared ZrO2-SiO2 aerogel are investigated and discussed. The results show that the mechanical strength of the self-reinforcing aerogels obviously increases from 0.51 to 3.11 MPa with the increase of impregnation times, while the thermal conductivity of the aerogels slightly increases from 0.0235 to 0.0306 W m(-1) K-1. The novel self-reinforcing ZrO2-SiO2 aerogel could have interesting applications in aerospace and energy because of its outstanding mechanical and thermal properties.
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