Abstract
In order to solve the shortcomings of poor mechanical properties of ceramic aerogels prepared by the sol-gel method in the market and the long-time consumption of the ceramic nanofiber aerogel (NFA) manufactured by the freeze-drying method, we adopted conjugate electrospinning and subsequent high-temperature calcination to realize the rapid preparation of ZrO2-SiO2 NFA under normal pressure. Influenced by the crystalline-amorphous structure inside of the single ZrO2-SiO2 ceramic nanofiber and the fluffy stacking among nanofibers, the ZrO2-SiO2 NFA can withstand 0.49 MPa tensile strength and be knotted like a rope. Moreover, the ZrO2-SiO2 NFA with a bulk density of 3.9 g cm?3 shows a thermal conductivity of 0.024 Wm?1 K?1 and has great potential for application in high-temperature insulation.
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