Fabrication of silicon-based ceramic synthesized from mesoporous carbon-silica nanocomposites

Kun Wang, Yi Bing Cheng, Huanting Wang

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Abstract

Mesoporous carbon-silica (C-SiO2) nanocomposites with different C/SiO2 molar ratios were used as precursor for fabricating silicon-based ceramics. Different silicon carbide nanostructures were synthesized by carbothermal reduction of mesoporous C-SiO2 nanocomposites via different heat treatments under argon. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption-desorption analysis were used to characterize C-SiO2 nanocomposites and SiC products. The major morphologies formed from the mesoporous C-SiO2 nanocomposites were nanoparticles and nanofibers. With higher quantity of P123, which is the surfactant for the mesopores, the BET surface area and pore volume increased, inducing a decrease of nanofibers. The mesoporous precursors were also heated at 1200 °C for 15 hours to make a nearly dense structure and then heated to the final temperature. The products were almost nanoparticles which had a larger size than those heated directly to 1450 °C. Therefore carbothermal reduction of mesoporous C-SiO2 precursors appears to be an effective means of accelerating the reaction and controlling SiC nanostructures.

Original languageEnglish
Title of host publicationProcessing of Nanoparticle Structures and Composites - A Collection of Papers Presented at the 2008 Materials Science and Technology conference, MS and T08
Pages71-78
Number of pages8
Volume208
Publication statusPublished - 2009
EventProcessing of Nanoparticle Structures and Composites - 2008 Materials Science and Technology conference, MS and T08 - Pittsburgh, PA, United States of America
Duration: 5 Oct 20089 Oct 2008

Publication series

NameCeramic Transactions
Volume208
ISSN (Print)10421122

Conference

ConferenceProcessing of Nanoparticle Structures and Composites - 2008 Materials Science and Technology conference, MS and T08
CountryUnited States of America
CityPittsburgh, PA
Period5/10/089/10/08

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