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Microstructure and Thermal Characterization of Multilayer Insulation Materials Based on Silica Aerogels

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Author(s): SHENG Chen, YU Yun, YU Yang, MI Le, TANG Gen-Chu, SONG Li-Xin

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 28;
Issue: 7;
Start page: 790;
Date: 2013;
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Keywords: multilayer insulations; silica aerogels; thermal conductivity

ABSTRACT
A new kind of MLIMs are prepared, whose spacer is made from Al2O3 fiber mat, and silica aerogels is implanted on the surface of Al2O3?fiber through Sol-Gel process. In high vacuum (10-3 Pa), the effective thermal conductivity of the new MILMs could be reduced by 21.8%, at the same time, the weight could be reduced by 67.2%. Furthermore, this MLIMs shows good insulation performance in high temperature of 1200 K and low vacuum (100 Pa).
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