Effects of fiber aspect ratio and fabrication temperature on the microstructure and mechanical properties of elastic fibrous porous ceramics by press-filtration method

The inherent brittleness of fibrous porous ceramics (FPCs) results in their fragility, limiting their application in thermal protection. In this paper, a novel elastic fibrous porous ceramic (EFPCs) with quasi-layered structure were successfully prepared by facile press-filtration method. To further investigate the characteristics of EFPCs, the effect of fiber aspect ratio and fabrication temperature on the microstructures and properties were studied. Results demonstrated that both fiber aspect ratio and fabrication temperature had influence on the microstructure and mechanical properties on EFPCs. The prepared EFPCs exhibited low density (0.124–0.181 g cm⁻³), relatively high compressive stress (0.096–0.377 MPa) compared to flexible fibrous ceramics, high porosity (91.73%–94.86%) and low thermal conductivity (∼0.03 W m⁻¹ k⁻¹). According to these excellent properties, the EFPCs may have potential use in thermal insulation fields.