Preparation and Performance of Aluminosilicate Fibrous Porous Ceramics Via Vacuum Suction Filtration

Abstract

catalyst support materials, [9][10][11] adsorption materials, 12,13) and so on. The preparation methods of FPCs mainly include freeze-drying, 14,15) gel-casting, 16,17) press filtration, 18,19) and vacuum suction filtration. 20,21) Zhang et al. 4) prepared mullite fibrous porous ceramics with a "wall-septa" structure through freeze-drying process, which exhibited excellent high-temperature mechanical properties. Jia et al. 17) used silica sol as binder and epoxy propane as gelation promoter to facilitate the solidification of silica sol, successfully preparing mullite fibrous porous ceramics with the nest-like structure via the gel-casting process. However, the above two methods have problems such as complex process flow and high preparation cost. Zhou et al. 19) prepared silica fibrous porous ceramics with perfect interlayer bonding by the press filtration process, which exhibited superior compression and resilience under a strain of 20 %. Dong et al. 20) prepared mullite fibrous porous ceramics by the vacuum suction filtration process using mullite fiber and boron-modified silica as the main raw materials. However, during the drying process, the uneven