Preliminary Characterization of Gel Precursors and Their High‐Temperature Products by 27Al Magic‐Angle Spinning NMR

Sridhar Komarneni; Rustum Roy; Colin A. Fyfe; Gordon J. Kennedy

doi:10.1111/j.1151-2916.1985.tb15801.x

Preliminary Characterization of Gel Precursors and Their High‐Temperature Products by ²⁷Al Magic‐Angle Spinning NMR

Sridhar Komarneni, Rustum Roy, Colin A. Fyfe, Gordon J. Kennedy

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

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)
Pages (from-to)	C‐243-C‐245
Journal	Journal of the American Ceramic Society
Volume	68
Issue number	9
DOIs	https://doi.org/10.1111/j.1151-2916.1985.tb15801.x
State	Published - Sep 1985

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1111/j.1151-2916.1985.tb15801.x

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title = "Preliminary Characterization of Gel Precursors and Their High‐Temperature Products by 27Al Magic‐Angle Spinning NMR",

abstract = "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.",

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AU - Komarneni, Sridhar

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AU - Fyfe, Colin A.

AU - Kennedy, Gordon J.

PY - 1985/9

Y1 - 1985/9

N2 - 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.

AB - 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.

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Preliminary Characterization of Gel Precursors and Their High‐Temperature Products by ²⁷Al Magic‐Angle Spinning NMR

Abstract

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