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Comptes Rendus

Solvent properties of glass melts: resemblance to aqueous solutions
Comptes Rendus. Chimie, Volume 5 (2002) no. 11, pp. 797-804.

Abstracts

The solvent properties of oxidic glass melts are compared with those of water and discussed in terms of chemical bonding and the ability of oxygen, in the oxidation state of –2, to donate electron charge. The nature of the environment for hosted metal ions is discussed and the optical basicity model is applied to problems of redox equilibria, such as for the Fe2+/Fe3+–oxygen(0)/oxide(–II) reaction and for the corrosion of metals generally. The application of the optical basicity model also allows the development of a relationship between the Lewis and Brønsted theories of acids and bases.

Les propriétés de solvant des verres d’oxyde sont comparées à celles de l’eau et discutées en termes de liaison chimique et de capacité de l’oxygène, au degré d’oxydation – 2, de transférer des électrons. La nature de l’environnement des ions solvatés est discutée en relation avec la basicité optique et les équilibres redox.

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Accepted:
Published online:
DOI: 10.1016/S1631-0748(02)01448-0
Keywords: solvent properties, basicity, acidity, optical basicity, redox, corrosion
Mots-clés : propriétés des solvants, basicité, acidité, basicité optique, oxydoréduction, corrosion

John A. Duffy 1; Malcolm D. Ingram 1

1 Chemistry Department, University of Aberdeen, Scotland, UK
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John A. Duffy; Malcolm D. Ingram. Solvent properties of glass melts: resemblance to aqueous solutions. Comptes Rendus. Chimie, Volume 5 (2002) no. 11, pp. 797-804. doi : 10.1016/S1631-0748(02)01448-0. https://comptes-rendus.academie-sciences.fr/chimie/articles/10.1016/S1631-0748(02)01448-0/

Version originale du texte intégral

1 Introduction

Water is a very good solvent for certain types of compound and, in many respects, oxidic glasses have very similar properties when in the molten state. It is because the detailed chemistry and physics of aqueous media have received so much attention, that in order to gain an understanding of glasses and glass melts comparisons with aqueous solutions are frequently made. Such comparisons can work very well. For example, metal ions dissolved in glass are often coloured similarly to their aqueous solutions, e.