Thermal stability of high surface area silicon carbide materials

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Contributors

Abstract

The synthesis of mesoporous silicon carbide by chemical vapor infiltration of dimethyl dichlorosilane into mesoporous silica SBA-15 and subsequent dissolution of the silica matrix with HF was investigated. The influence of the synthesis parameters of the composite material (SiC/SBA-15) on the final product (mesoporous SiC) was determined. Depending on the preparation conditions, materials with specific surface areas from 410 to 830 m2 g-1 and pore sizes between 2 and 10 nm with high mesopore volume (0.31-0.96 cm3 g-1) were prepared. Additionally, the thermal stability of mesoporous silicon carbide at 1573 K in an inert atmosphere (argon) was investigated, and compared to that of SBA-15 and ordered mesoporous carbon (CMK-1). Mesoporous SiC has a much higher thermal textural stability as compared to SBA-15, but a lower stability than ordered mesoporous carbon CMK-1.

Details

Original languageEnglish
Pages (from-to)2281-2289
Number of pages9
JournalJournal of solid state chemistry
Volume179
Issue number8
Publication statusPublished - Aug 2006
Peer-reviewedYes