Mullite (3Al2O3-2SiO2) synthesis with aluminosiloxanes

Author
Publication Year
1996

Type

Journal Article
Abstract

High-yield mullite (3A1(2)O(3)-2SiO(2)) 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 degrees 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.

Journal
Chemistry of Materials
Volume
8
Pages
2056-2060
Date Published
08/1996
ISBN
0897-4756
Accession Number
WOS:A1996VC73200055

Times Cited: 24Treadwell, DR Dabbs, DM Aksay, IA