Multi-layer graded doping in silica aerogel insulation with temperature gradient

Ultralight elastic Al2O3nanorod-graphene aerogel for pressure sensing and thermal superinsulation

“…Al 2 O 3 is highly transparent to infrared radiation, 39 while graphene with high specific extinction coefficient can effectively suppress λ r and thus reduce the total thermal conductivity at high temperatures. 43 It is noteworthy that the thermal conductivity of ANGAs at 1000 °C decreases and then increases with the addition of nanorods, reaching a minimum value of 0.0702 W m −1 K −1 at ANGA-6, which is the result of the competition between λ r and λ s .…”

Direct synthesis of ultralight, elastic, high-temperature insulation N-doped TiO2 ceramic nanofibrous sponges via conjugate electrospinning

“…Moreover, TiO 2 with a high absorption mechanism or reflectivity for near-infrared bandwidth can significantly decrease the infrared transmittance and reduce thermal radiation at elevated temperatures, thereby reducing the thermal conductivity and enhancing the thermal insula-tion capacity. 21,39,40 We put the elastic nanofibrous 3D material on a heating table at 400 °C for 1 h (Fig. 6d) and used an infrared camera to monitor the dynamic temperature distribution during heating to further assess the actual thermal insulation performance of N-TiO 2 CNSs under extreme conditions.…”

Ultralight Ceramic Fiber Aerogel for High-Temperature Thermal Superinsulation

“…The Matlab functions by Schäfer are used for calculating Q ext,o of a single opacifier [37]. In this situation, the spectral extinction coefficient β k,o of SiC opacifiers is given by [41]:…”