Ultralight Ceramic Fiber Aerogel for High-Temperature Thermal Superinsulation.

ABSTRACT: Emerging fiber aerogels with excellent mechanical properties are considered as promising thermal insulation materials. However, their applications in extreme environments are hindered by unsatisfactory high-temperature thermal insulation properties resulting from severely increased radiative heat transfer. Here, numerical simulations are innovatively employed for structural design of fiber aerogels, demonstrating that adding SiC opacifiers to directionally arranged ZrO₂ fiber aerogels (SZFAs) can substantially reduce high-temperature thermal conductivity. As expected, SZFAs obtained by directional freeze-drying technique demonstrate far superior high-temperature thermal insulation performance over existing ZrO₂-based fiber aerogels, with a thermal conductivity of only

SUBMITTER: Liu F 

PROVIDER: S-EPMC10143725 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature