Journal of Materials Research

Articles

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

S. Prabakara1, K.J. Raoa1 and C.N.R. Raoa1 c1

a1 Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore-560 012, India

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.

(Received March 07 1991)

(Accepted July 25 1991)

Correspondence:

c1 Address correspondence to this author.

0Comments