Chemical Durability of Se_(900.9x)S_(100.1x)As_x
and Se_(600.6x)S_(400.4x)As_x Glasses

S. G. Vlasova, L. G. Protasova, and G. A. Kitaev

Ural State Technical University, ul. Mira 19, Yekaterinburg, 620002 Russia

Received May 6, 1997

Abstract—The glasses of two series Se_(90–0.9x)S_(10–0.1x)As_x and Se_(60–0.6x)S_(40–0.4x)As_x (where x varies from 0 to
15 at. % with a step of 2.5 at. %) are studied. It is revealed that, according to the DIN technique (German Indus-
trial Standards), the glasses belong to the acid class I, hydrolytic class I, and alkali class III. The kinetic regu-
larities of dissolution of chalcogenide glasses in alkaline solutions are determined under steady-state conditions
without stirring. The quantitative dependences of the dissolution rate on temperature, concentration of alkaline
solutions, and arsenic content in the glasses are obtained. The activation energies for dissolution are calculated.

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