Third International Conference on the Structure of Non-Crystalline Materials

J. Phys. Colloques 46 (1985) C8-629-C8-633
DOI: 10.1051/jphyscol:19858101

STRUCTURAL EFFECTS IN THE ELECTROLYTES GLASS (LiC₁) _xH₂O AND THE NUCLEATION OF METASTABLE PHASES

A. Elarby-Aouizerat¹, P. Chieux², P. Claudy³, J. Dupuy¹, J.F. Jal¹ and J.M. Letoffe<sup>3

1</sup>  Université Claude Bernard, Lyon I, 69622 Villeurbanne Cedex, France
²  Institut Lauë Langevin, 156 X, 38042 Grenoble Cedex, France
³  Laboratoire de Thermochimie, I.N.S.A. de Lyon, France

Résumé
L'intérêt des électrolytes aqueux pour la compréhension de l'état vitreux est montré par la diffusion ou la diffraction de neutrons et par D.S.C. Sur deux gammes de compositions, le verre formé ne cristallise pas et un verre avec deux Tg différentes est obtenu. L'effet endothermique observé par D.S.C. pendant Tg, est attribué à un réarrangement du verre. L'effet thermique, se produisant dans le liquide très au-dessus de Tg, est probablement dû au réarrangement des molécules d'eau.

Abstract
The interest of aqueous electrolytes for the understanding of the glassy state is shown by neutron scattering or neutron diffraction and Differential Scanning Calorimetry (D.S.C.). In two ranges of composition the formed glass does not crystallize, and a glass with two different Tg is shown. The overshot as observed by D.S.C. during Tg is attributed to a reordering of the glass. The thermal effect occuring in the liquid well above Tg is probably due to a rearrangement of the water molecules.

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