Synthesis of nanoporous silicon carbide via the preceramic polymer route

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dc.contributor.authorMaddocks, ARen_AU
dc.contributor.authorCassidy, DJen_AU
dc.contributor.authorJones, ASen_AU
dc.contributor.authorHarris, ATen_AU
dc.date.accessioned2010-04-07T03:53:17Zen_AU
dc.date.accessioned2010-04-30T05:04:08Zen_AU
dc.date.available2010-04-07T03:53:17Zen_AU
dc.date.available2010-04-30T05:04:08Zen_AU
dc.date.issued2009-02-15en_AU
dc.date.statistics2009-02-15en_AU
dc.description.abstractNanoporous silicon carbide materials were prepared by the pyrolysis of the preceramic polymer, polycarbosilane (PCS), with and without the addition of an inert filler (nano- and micron-sized silicon carbide powders). Hydrosilylation crosslinking of PCS with divinylbenzene prior to pyrolysis appeared to have little influence on the development of micro- and mesoporosity. Maximum micropore volumes were 0.28 cm3 g−1 for non-crosslinked PCS and 0.25, 0.33 and 0.32 cm3 g−1 for PCS crosslinked with 2, 6 and 10 wt.% DVB respectively. Micropore volumes decreased under hydrothermal conditions to 0.03 cm3 g−1 for non-crosslinked and 0 cm3 g−1 for crosslinked PCS. Porosity was also lost at temperatures above 700°C. The addition of nano-sized SiC powders to PCS prior to pyrolysis maintained mesoporosity to temperatures of 1200°C, however, micron-sized SiC powders did not maintain porosity above 800°C. The modal pore size in pellets formed by compressing micron-sized powders with the preceramic polymer was 5 μm compared to 30 nm when nano-sized powders were used. © 2009, Elsevier Ltd.en_AU
dc.identifier.citationMaddocks, A. R., Cassidy, D. J., Jones, A. S., & Harris, A. T. (2009). Synthesis of nanoporous silicon carbide via the preceramic polymer route. Materials Chemistry and Physics, 113(2-3), 861-867. doi:10.1016/j.matchemphys.2008.08.064en_AU
dc.identifier.govdoc1267en_AU
dc.identifier.issn0254-0584en_AU
dc.identifier.issue2-3en_AU
dc.identifier.journaltitleMaterials Chemistry and Physicsen_AU
dc.identifier.pagination861-867en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.matchemphys.2008.08.064en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3081en_AU
dc.identifier.volume113en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectPorous materialsen_AU
dc.subjectCarbidesen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectAdsorptionen_AU
dc.subjectSilicon carbidesen_AU
dc.subjectPolymersen_AU
dc.titleSynthesis of nanoporous silicon carbide via the preceramic polymer routeen_AU
dc.typeJournal Articleen_AU
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