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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.

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

1.Fyfe, C. A., in Solid State NMR for Chemists (Guelph, C. N.C. Press, 1983).Google Scholar
2.Dupree, R., Lewis, M. H., and Smith, M. E., J. Appl. Cryst. 21, 109 (1988).CrossRefGoogle Scholar
3.Prabakar, S., Rao, K. J., and Rao, C. N. R., J. Mater. Res. 6, 592 (1991).CrossRefGoogle Scholar
4.Rao, C. N. R. and Rao, K. J., Phase Transitions in Solids (McGraw-Hill Inc., New York, 1978).Google Scholar
5.Pach, L., Roy, R., and Komarneni, S., J. Mater. Res. 5, 278 (1990).CrossRefGoogle Scholar
6.Collongues, R., Gourier, D., Kahn, A., Boilot, J. P., Colomban, Ph., and Wicker, A., J. Phys. Chem. Solids 45, 981 (1984).CrossRefGoogle Scholar