Preparation and characterization of 3-dimensionally ordered macroporous SiC
Three-dimensionally (3D) long range ordered macroporous SiC ceramics were prepared through infiltrating polymethylsilane (PMS) into the 3D ordered sacrificial silica template, pyrolysis and the template removal. It was found that the pore size (84-658 nm), BET surface area (299.44-584.64 m2/g) and micropore volume (0.25-0.64 cm3/g) of the achieved porous SiC can be tailored by utilizing different sizes silica sphere templates. There exist three kinds of pores in the porous ceramics: sphere inversed pores, windows and mesopores (2-5 nm). The sphere inversed pores were packed as hcp structure and three dimensionally penetrated through the windows, and the mesopores endowed the porous ceramics surprising high BET surface areas and micropore volumes.
作 者： WANG Hao LI Xiaodong YU Fu-cheng KIM Dong-pyo 作者单位： WANG Hao,LI Xiaodong(CFC Key Lab of National University of Defense Technology, Changsha 410073, China)YU Fu-cheng,KIM Dong-pyo(Department of Fine Chemical Engineering and Chemistry of Chungnam National University, Taejon 305-764, South Korea)
刊 名： 中国科学E辑（英文版） SCI 英文刊名： SCIENCE IN CHINA SERIES E:TECHNOLOGICAL SCIENCES 年，卷(期)： 2006 49(1) 分类号： O6 关键词： three-dimensionally ordered materials templated technique preceramic polymer conversion technique SiC ceramic