The environment of the Al atom in alumina gels, single‐phase and diphasic mullite gels, and their transformation products was studied by 27Al magic‐angle spinning nuclear magnetic resonance (MASNMR). Alumina gels made from inorganic and organic precursors showed exactly the same 27Al MASNMR spectra. Heat treatment of gels at 500°C caused artial conversion of octahedral Al to tetrahedral Al. The Al in single‐phase mullite gel appears to be highly ordered compared to that in diphasic mullite gel.
|Original language||English (US)|
|Journal||Journal of the American Ceramic Society|
|State||Published - Sep 1985|
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry