Highly Oriented SiC@SiO Ceramic Fiber Aerogels with Good Anisotropy of the Thermal Conductivity and High-Temperature Resistance.

Here electrospinning and freeze-drying techniques are combined to fabricate an anisotropic SiC@SiO ceramic fiber aerogels (A-SiC@SiO-FAs). The anisotropic structure of the A-SiC@SiO-FAs features aligned layers stacking layer-by-layer with the same direction and highly oriented 1D fibers inside each layer. The A-SiC@SiO-FAs exhibit anisotropic thermal properties with an extremely low thermal conductivity of 0.