Vacuum impregnation treatment of microporous Al2O3-MgAl2O4 refractory raw materials with sub-micron pores and high strength

Preparation and enhanced mechanical properties of novel Al2O3‐C ceramic filter reinforced by microporous powder and SiC whiskers

“…% Al 2 O 3 , 8.60 wt. % MgO, bulk density: 2.53 g/cm 2 , apparent porosity: 33.6 %, prepared by in situ decomposition pore‐forming technique 23–27 ), Si powder (d 50 = 27 μm, 98.5 wt. % Si), nano‐Al 2 O 3 powder (d 50 = 30 nm, 99.99 wt.…”

“…22 Thus, we propose a new strategy to enhance the mechanical properties of Al 2 O 3 -C ceramic filters. By using the microporous raw material [23][24][25][26][27][28][29][30] to replace the dense one for the fabrication of novel Al 2 O 3 -C ceramic filters, the microporous raw material can increase the roughness of the filter skeleton surface because it contains a lot of micropore structures, as shown in Figure 1, which will have the potential for improving the adsorption capacity of the filter skeleton surface for non-metallic inclusions. On this basis, adding Si powder into the filter skeleton to form SiC whiskers in situ through the vapor-solid reaction mechanism [31][32] can also help to enhance the mechanical properties of the novel Al 2 O 3 -C ceramic filters.…”