Preparation and characterization of 3-dimensionally ordered macroporous SiC  

作　　者：KIM Dong-pyo 

机构地区：[1]Department of Fine Chemical Engineering and Chemistry of Chungnam National University, Taejon 305-764, South Korea

出　　处：《Science China(Technological Sciences)》2006年第1期1-9,共9页中国科学（技术科学英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (Grant No. 59972042);the Korea National Research Laboratory Program (Grant No. M10400000061-04J0000-06110); the Doctor Innovation Fund of National University of Defense Technology in China (2001-2004).

摘　　要：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.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.

关 键 词：three-dimensionally ORDERED materials  TEMPLATED technique  preceramic polymer CONVERSION technique  SiC ceramic. 

分 类 号：TB383.4[一般工业技术—材料科学与工程]