Fabrication of macroporous silicon carbide ceramics by intramolecular carbothermal reduction of phenyl-bridged polysilsesquioxane

George Hasegawa, Kazuyoshi Kanamori, Kazuki Nakanishi, Teiichi Hanada

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Abstract

Macroporous SiC ceramics were obtained from porous phenyl-bridged polysilsesquioxane prepared by a sol-gel method accompanied by spinodal decomposition subsequently subjected to intramolecular carbothermal reduction. By this method, we can obtain macroporous SiC ceramics with improved atomic-level homogeneity and controlled pore size more easily than by intermolecular carbothermal reduction using a mixture of SiO2 and carbon powder. Therefore, the resultant SiC ceramics have sufficiently high purity without washing with hydrofluoric acid to remove residual SiO 2.

Original languageEnglish
Pages (from-to)7716-7720
Number of pages5
JournalJournal of Materials Chemistry
Volume19
Issue number41
DOIs
Publication statusPublished - Oct 22 2009

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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