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Jingran Guo, Shubin Fu, Yuanpeng Deng, Xiang Qun Xu, Shujin Laima, Dizhou Liu, Pengyu Zhang, Jian Ping Zhou, Han Zhao, Hongxuan Yu and 5 more
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 coefficient (1.2 × 10 −7 per degree Celsius), which ensures excellent structural flexibility and thermomechanical properties. They show high thermal stability with ultralow strength degradation (less than 1 per cent) after sharp thermal shocks, and a high working temperature (up to 1,300 degrees Celsius). By deliberately entrapping residue carbon species in the constituent hypocrystalline zircon fibres, we substantially reduce the thermal radiation heat transfer and achieve one of the lowest high-temperature thermal conductivities among ceramic aerogels so far—104 milliwatts per metre per kelvin at 1,000 degrees Celsius. The combined thermomechanical and thermal insulating properties offer an attractive material system for robust thermal insulation under extreme conditions.
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Guo, J., Fu, S., Deng, Y., Xu, X. Q., Laima, S., Liu, D., Zhang, P., Zhou, J. P., Zhao, H., Yu, H., Dang, S., Zhang, J., Zhao, Y., Li, H., & Duan, X. (2022). Hypocrystalline ceramic aerogels for thermal insulation at extreme conditions. Nature, 606(7916), 909–916. https://doi.org/10.1038/s41586-022-04784-0
Guo, Jingran, et al. "Hypocrystalline ceramic aerogels for thermal insulation at extreme conditions." Nature, vol. 606, no. 7916, 2022, pp. 909–916, https://doi.org/10.1038/s41586-022-04784-0.
Guo, Jingran, Shubin Fu, Yuanpeng Deng, Xiang Qun Xu, Shujin Laima, Dizhou Liu, Pengyu Zhang, et al. "Hypocrystalline ceramic aerogels for thermal insulation at extreme conditions." Nature 606, no. 7916 (2022): 909–916. https://doi.org/10.1038/s41586-022-04784-0.
Guo J., Fu S., Deng Y. [и др.] Hypocrystalline ceramic aerogels for thermal insulation at extreme conditions // Nature. — 2022. — Vol. 606, № 7916. — P. 909–916. — URL: https://doi.org/10.1038/s41586-022-04784-0
@article{guo2022hypocrystalline,
title = {{Hypocrystalline ceramic aerogels for thermal insulation at extreme conditions}},
author = {Jingran Guo and Shubin Fu and Yuanpeng Deng and Xiang Qun Xu and Shujin Laima and Dizhou Liu and Pengyu Zhang and Jian Ping Zhou and Han Zhao and Hongxuan Yu and Shixuan Dang and Jianing Zhang and Yingde Zhao and Hui Li and Xiangfeng Duan},
journal = {Nature},
year = {2022},
volume = {606},
number = {7916},
pages = {909--916},
doi = {10.1038/s41586-022-04784-0},
url = {https://doi.org/10.1038/s41586-022-04784-0}
}TY - JOUR AU - Guo, Jingran AU - Fu, Shubin AU - Deng, Yuanpeng AU - Xu, Xiang Qun AU - Laima, Shujin AU - Liu, Dizhou AU - Zhang, Pengyu AU - Zhou, Jian Ping AU - Zhao, Han AU - Yu, Hongxuan AU - Dang, Shixuan AU - Zhang, Jianing AU - Zhao, Yingde AU - Li, Hui AU - Duan, Xiangfeng TI - Hypocrystalline ceramic aerogels for thermal insulation at extreme conditions JO - Nature VL - 606 IS - 7916 SP - 909 EP - 916 PY - 2022 DA - 2022/06/29 DO - 10.1038/s41586-022-04784-0 UR - https://doi.org/10.1038/s41586-022-04784-0 ER -
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