烧结助剂对低温制备碳化硅多孔陶瓷性能的影响

In this study, silicon carbide (SiC) porous ceramic supports were prepared via dry pressing method with the sintering temperature of 1150℃. Isodium dodecyl benzene sulfonate (SDBS), sodium hydroxide (NaOH) and NaA molecular sieve residue were used as sintering additives, carbon powder was employed as pore forming agent, respectively. The effects of additives on microstructure, average pore size, porosity and thermal shock resistance were investigated. The low-temperature sintering mechanism of additives was analyzed. The research results showed that the ceramics have an enhanced gas permeance, bending strength and thermal shock resistance. Ceramics doped with NaA molecular sieve residue possesses the best gas permeance of 1300 m³/(m²•h•kPa), bending strength of 27 MPa, and good thermal shock resistance.