Citation: A.Kouyate, A.E Ahoussou, A.Yapi, D.Diabate, J.Rogez, A.Trokourey. Influence of alkali mixed effect on the mixing enthalpy in 0.75B₂O₃-0.25[xNa₂O-(1-x)K₂O]glass system[J]. Chinese Chemical Letters, ;2008, 19(10): 1252-1255. doi: 10.1016/j.cclet.2008.06.034 shu

Influence of alkali mixed effect on the mixing enthalpy in 0.75B₂O₃-0.25[xNa₂O-(1-x)K₂O]glass system

A.Kouyate ^a, ,
A.E Ahoussou ^a ,
A.Yapi ^a ,
D.Diabate ^a ,
J.Rogez ^b ,
A.Trokourey ^a

a Laboratoire de Chimie-Physique, UFR-SSMT, Université de Cocody, 22 BP 582 Abidjan 22, Cote d'Ivoire;
b Institut des Matériaux, de Microélectronique, de Nanoscience de Provence, IM2NP, UMR 6242, CNRS, Université Paul Cézanne, Marseille, Faculté des Sciences et Techniques de St Jérôme, 13397 Marseille Cedex 20, France

Received Date: 23 January 2008

The mixed alkali effect was investigated in the glass system 0.75B₂O₃-0.25[xNa₂O-(1-x)K₂O]through thermodynamic properties.The calorimetric measurements were performed in HF solution calorimetry at 298 K,The mixing enthalpy values show non-linear behaviour upon substitution of one alkali ion by another.This thermodynamic non-idealiIy is caused by the slight variations of distance between metallic cations,the macromolecular structure being unchanged.It can be explained,at least qualitatively,using electrolyte theory based on the Coulombic interactions of charged species originally developed by Debye and Hiickel.
- Alkali mixed effect,
- Calorimetry,
- Mixing enthalpy,
- Coulombie interactions
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