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Precursor States in the Phase Transformation Accompanying a Solid-Solid Reaction

Published online by Cambridge University Press:  21 February 2011

O. Chaix-Pluchery
Affiliation:
ILL, BP 156X, 38042 Grenoble Cedex, France;
J. Bouillot
Affiliation:
ILL, BP 156X, 38042 Grenoble Cedex, France;
F. Freund
Affiliation:
Mineralogisches Institut, Universität Köln, Zülpicher Strasse 49, 5000 Köln 1, Fed. Rep. Germany;
J.C. Niepce
Affiliation:
Laboratoire Réactivité des Solides, Faculté des Sciences Mirande, BP 138, 21004 Dijon Cedex, France;
M. Peyrard
Affiliation:
Laboratoire Optique du Réseau Cristallin, Faculté des Sciences Gabriel, BP 138, 21004 Dijon Cedex, France.
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Abstract

The studied transformation is associated with the decomposition reaction of brucite-type hydroxides into the corresponding oxide. It is shown, by various techniques (X-ray and neutron diffraction, Raman Spectroscopy, proton conductivity) that some modifications take place in the hydroxide structure before its transformation into the oxide structure,i.e., at a temperature lower than the transformation temperature. A mechanism is proposed to account for the experimental data.

Type
Research Article
Copyright
Copyright © Materials Research Society 1984

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References

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