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- W2895844408 abstract "Ultralow thermal conductivity and ultralight mullite fibers/mullite whiskers composite aerogels (MF/MW) with secondary-pore structure have been prepared via vacuum impregnation and high-temperature treatment. The in-situ generation of mullite whiskers during vapour-solid reaction process and the mechanism of improving thermal stability have been discussed in detail. Under catalysis condition at 1200 °C, the zero-dimensional nanoparticles of SiO2-Al2O3 aerogels are guided to in-situ transform into one-dimensional mullite whiskers. The secondary-pore structure formed by the overlapped fibers and whiskers in MF/MW reduces the thermal conductivity [as low as 0.0488 W/m−1 K−1 compared with that of MF preform (0.0698 W/m−1 K−1)] and exhibits excellent thermal stability after 1400 °C heat treatment (0.0503 W/m−1 K−1) due to the macropores are decreased and gaseous heat transfer being further weakened effectively. Moreover, the MF/MW exhibits good mechanical performance with high critical compressive stress of 0.2809 MPa, which is more than 317% higher than that of MF preform (0.0673 MPa) at room temperature." @default.
- W2895844408 created "2018-10-26" @default.
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- W2895844408 date "2019-04-01" @default.
- W2895844408 modified "2023-10-18" @default.
- W2895844408 title "Constructing secondary-pore structure by in-situ synthesized mullite whiskers to prepare whiskers aerogels with ultralow thermal conductivity" @default.
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- W2895844408 doi "https://doi.org/10.1016/j.jeurceramsoc.2018.10.015" @default.
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