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A kinetic study of the phase transformations in Al2O3 and Na2O · 6Al2O3 by a combined use of 27Al MAS NMR spectroscopy and x-ray diffraction: Importance of nucleation

Published online by Cambridge University Press:  31 January 2011

S. Prabakar ,
K.J. Rao  and
C.N.R. Rao
S. Prabakar
Affiliation:
Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore-560 012, India
K.J. Rao
Affiliation:
Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore-560 012, India
C.N.R. Rao*
Affiliation:
Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore-560 012, India
*
a)Address correspondence to this author.
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Abstract

Phase transformations of Al2O3 and Na2O · 6Al2O3 prepared by the gel route have been investigated for the first time by 27Al MAS NMR spectroscopy in combination with x-ray diffraction. Of particular interest in the study is the kinetics of the γ → α and γ → β transformations, respectively, in these two systems. Analysis of the kinetic data shows the important role of nucleation in both these transformations.

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Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 12 , December 1991 , pp. 2701 - 2705
Copyright
Copyright © Materials Research Society 1991

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References

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