Hypocrystalline ceramic aerogels for thermal insulation at extreme conditions.

ABSTRACT: Thermal insulation under extreme conditions requires materials that can withstand complex thermomechanical stress and retain excellent thermal insulation properties at temperatures exceeding 1,000 degrees Celsius^1-3. Ceramic aerogels are attractive thermal insulating materials; however, at very high temperatures, they often show considerably increased thermal conductivity and limited thermomechanical stability that can lead to catastrophic failure^4-6. Here we report a multiscale design of hypocrystalline zircon nanofibrous aerogels with a zig-zag architecture that leads to exceptional thermomechanical stability and ultralow thermal conductivity at high temperatures. The aerogels show a near-zero Poisson's ratio (3.3 × 10^-4) and a near-zero thermal expansion

SUBMITTER: Guo J 

PROVIDER: S-EPMC9242853 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature