State Key Laboratory for Mechanical Behavior of Materials , Xi'an Jiaotong University , Xi'an , 710049 , China.
ACS Appl Mater Interfaces. 2019 Dec 4;11(48):45338-45344. doi: 10.1021/acsami.9b16811. Epub 2019 Nov 22.
Resilient ceramic aerogels exhibit great potential for applications in harsh environments owing to their unique combination of ultrahigh porosity, lightweight, reversible compressibility, and good thermal and chemical stabilities. However, their applications are severely restricted by the limited size and low yield due to their complicated and time-consuming synthetic procedures. Herein, we developed an efficient method for large-scale production of resilient SiC nanowire aerogels (SiC NWAGs) with tunable densities and desired shapes. The as-synthesized SiC NWAGs displayed excellent high-temperature stability (the maximum working temperature in Ar and air can reach to 1400 and 1000 °C, respectively), outstanding flame-erosion resistance and low thermal conductivity (25 mW m K). The easy fabrication of such ceramic aerogel on a large scale will pave the way for the widespread applications of ceramic aerogels.
弹性陶瓷气凝胶由于其超高孔隙率、轻质、可压缩性以及良好的热稳定性和化学稳定性的独特组合，在恶劣环境下的应用具有巨大的潜力。然而，由于其复杂且耗时的合成工艺，其应用受到其有限的尺寸和低产率的严重限制。在此，我们开发了一种高效的方法，可大规模生产具有可调密度和所需形状的弹性碳化硅纳米线气凝胶（SiC NWAG）。合成的 SiC NWAG 表现出优异的高温稳定性（在 Ar 和空气中的最高工作温度分别可达 1400 和 1000°C）、出色的耐火焰烧蚀性和低热导率（25 mW m K）。这种陶瓷气凝胶的大规模简易制造将为陶瓷气凝胶的广泛应用铺平道路。
