Gel to glass transformation of methyltriethoxysilane: A silicon oxycarbide glass precursor investigated using vibrational spectroscopy

Arnold Desmartin Chomel, Philip Dempsey, Jerôme Latournerie, Djamila Hourlier-Bahloul, Upali A. Jayasooriya

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Abstract

Gel to glass transformation of methyltriethoxysilane was investigated using infrared and Raman spectroscopies. The vibrational frequencies of the Si-O network are found to be a sensitive probe of the gel to glass transformation, which is measured to be at ca. 950 degrees C for this system, under the experimental conditions used for the synthesis. Vibrational data are also compatible with an earlier suggestion of the presence of polyhedral silsesquioxanes type structures embedded in a 3-D network. Further evidence is presented for the formation of Si-CH2-Si and Si-C2H4-Si units during the pyrolysis process.
Original languageEnglish
Pages (from-to)4468-4473
Number of pages6
JournalChemistry of Materials
Volume17
Issue number17
DOIs
Publication statusPublished - 2005

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