1results about How to "Good superelasticity" patented technology

This invention discloses a method for preparing monolithic SiC nanowire aerogels via in-situ carbothermal reduction, as well as the SiC nanowire aerogels prepared by this method and their applications, belonging to the field of advanced ceramic materials and aerogel preparation technology. This method uses biomass-derived cellulose fibers as the carbon source and three-dimensional template, silica nanoparticles as the silicon source, and NH4Cl as a volume shrinkage inhibitor. Through precursor preparation, freeze-drying, carbothermal reduction, and post-treatment steps, the controllable preparation of monolithic SiC nanowire aerogels is achieved. This invention features a simple, green, and economical process, is easily scalable, and allows for near-net-shape forming of complex shapes through mold design. The prepared aerogel has a three-dimensional interwoven nanowire network structure with a porosity as high as 99.7% and a thermal conductivity as low as 0.045 W / (m·K). It also exhibits excellent superelasticity, high-temperature stability, and high-efficiency oil absorption capacity, making it suitable for applications such as aerospace high-temperature insulation, energy system protection, and oil pollution treatment.