Fabrication of Porous SiC Ceramics with Special Morphologies by Sacrificing Template Method

Author: Wang Hao   Sung Inkyung   Li Xiaodong   Kim Dongpyo  

Publisher: Springer Publishing Company

ISSN: 1380-2224

Source: Journal of Porous Materials, Vol.11, Iss.4, 2004-10, pp. : 265-271

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Abstract

Sacrificial template technique is widely used in producing porous materials with controlled morphologies and tailored properties. In this paper, unique templates such as filters, carbon nanotube, carbon fiber and silica were used to make porous SiC ceramic with special morphologies. Template derived porous ceramic plates, SiC nano-net, fiber-inverse and bead-inverse porous SiC ceramic were successfully prepared from the preceramic precursor, polymethylsilane (PMS). The synthesis procedures were involved with the infiltration of the templates with appropriate concentration of the preceramic polymer, their curing, pyrolysis and subsequent template removal. The synthesized porous SiC was characterized by SEM, TEM, XRD and BET methods.