| 초록 |
The porous ceramics have received attention in various fields such as catalyst support, membrane, scaffold, and fuel reforming application because of their high thermal stability, excellent chemical, creep and oxidation resistance, along with their large surface area. The use of preceramic polymer is one of the good recipes to manufacture porous ceramics, since micro- or meso-sized pores are generated by removing organic groups during pyrolyzing preceramic polymer to ceramics. However, if the cross-linking density of the preceramic polymer is not sufficient before the pyrolysis, the formed pores will collapse. In this study, we tried to fabricate porous silicon carbonitride (SiCN) using phenyl-silsesquiazane (SSQZ) and freeze casting method. Due to the branched structure of SSQZ that increased cross-linking density, the structural stability of the generated pores was improved. In addition, glycidyl-POSS and diepoxide was also used to further increase the cross-linking density. |
