Abstract Porous fibrous materials (PFMs) with three-dimensional networks were prepared by mullite fibers as skeleton and silica sols as binder via pressure and freeze-casting method. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and mercury intrusion porosimetry (MIP) were used to investigate the microstructures, phase and porous characteristics. The density of PFMs can be controlled by adjusting the pressure and sintering during the synthetic process. With the increase of density, the mechanical and thermal conduction properties were increased due to densification of fibers. Based on their lightweight and low thermal conductivity, the PFMs can be used in the field of high temperature thermal insulation.

中文翻译：

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三维网状莫来石多孔纤维材料的加压和冷冻铸造法制备及表征

摘要 以莫来石纤维为骨架，硅溶胶为粘结剂，采用加压冷冻浇注法制备了具有三维网络的多孔纤维材料（PFMs）。使用扫描电子显微镜 (SEM)、X 射线衍射 (XRD) 和压汞法 (MIP) 来研究微观结构、相和多孔特性。PFMs 的密度可以通过调节合成过程中的压力和烧结来控制。随着密度的增加，由于纤维的致密化，机械和热传导性能增加。基于其轻质和低导热性，PFM 可用于高温隔热领域。