As-Se,As-Se-S,As-Se-Te,As-Se-Tl系ガラスの密度および熱処理による密度変化

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Density of glasses in the systems As-Se, As-Se-S, As-Se-Te and As-Se-Tl were measured as functions of composition and annealing. Some thermal expansion measurements were also conducted. The results obtained are summarized as follows: (1) The density of the As-Se glass increases with increasing concentration of As up to its maximum at about 42 atomic per cent As, and then decreases (Fig. 1). (2) The effect of the third component X (X=S, Te and Tl) added to the As2Se3 glass on the density change is seen in Fig. 2. (3) Contraction-expansion curves at constant temperatures of the As-Se glass are shown in Figs. 3-6 for temperatures ranging from 108° to 165°C. Implication of the results as to the constitution of the chalcogenide glasses was discussed based on the molar volume conception.
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