Effect of sulfur atom substitute with selenium on stability of glassy Ge20As14SxSe52-XI14 chalcohalides Original Research Article

The paper presents results of the research carried out with the aim of establishing the effect of sulfur atom substitute with selenium on thermal and chemical stability of glasses of the Ge20As14SxSe52-xI14 type. Chemical stability of glasses was estimated on the basis of their dissolution rate in potassium hydroxide of different concentrations. It was found that the rate of dissolving in KOH solutions increases with the increase of the percentage of sulfur content in the glass. The dissolving rate also depends on concentration of basic solution. It was found that the functional dependence of the rate of their dissolution could be described by an exponential function. Values of the glass transition point, as well as the temperature of the beginning of thermomechanical deformation were determined by the methods of thermomechanical analysis. It was established that characteristic temperatures increase insignificantly as sulfur content increases in investigated system.