Mullite (3Al2O3-2SiO2) synthesis with aluminosiloxanes

D. R. Treadwell, D. M. Dabbs, Ilhan A. Aksay

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High-yield mullite (3Al2O3-2SiO2) precursors consist of aluminosiloxanes synthesized from mixtures of aluminum and silicon alkoxides. Atomic level mixing of the aluminum and silicon oxides is demonstrated by the low-temperature conversion (<1000 °C) of the aluminosiloxanes to phase-pure mullite. The proper selection of monomeric side groups serves several functions: (i) controlling reactivity of the silicon and aluminum monomers, thereby favoring atomic-level mixing; (ii) maintaining the tractability of the resulting aluminosiloxane; (iii) improving the yield during mullitization of the aluminosiloxane through easy thermolytic removal. The tractability of the aluminosiloxane compounds permits these materials to be used in fiber spinning, the casting of thin films and monoliths, and as impregnants to powder compacts.

Original languageEnglish (US)
Pages (from-to)2056-2060
Number of pages5
JournalChemistry of Materials
Issue number8
StatePublished - Aug 1996

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • Materials Chemistry


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