Abstract
Specific heat measurements have been made in glassy Se80-xTe20Agx (0 ≤ x ≤ 15) alloys using differential scanning calorimetry (DSC) technique. An extremely large increase in the specific heat values has been observed at the glass transition temperature. It has also been found that the values of Cp below glass transition temperature and the difference of Cp values before and after glass transition (ΔCp) are highly composition dependent. This indicates that the incorporation of Ag in binary Se80Te20 alloy in the present study influences the structure of the binary alloy. Specific heat of the additive element Ag is found to be important for the observed changes in the specific heat of the ternary alloys as compared to binary alloy.
Highlights
Chalcogenide glasses belong to family of non-oxide glassy alloys, which contain a large amount of chalcogen elements Se, S and Te from VI group of the Periodic Table
When a material is subjected to a linear temperature programme, the heat flow rate into the sample is proportional to its instantaneous specific heat
Calorimetric measurements have been performed in glassy Se80−xTe20Agx (0 ≤ x ≤ 15) alloys to study the effect of Ag additive on the specific heat in glassy Se80Te20 alloy
Summary
Chalcogenide glasses belong to family of non-oxide glassy alloys, which contain a large amount of chalcogen elements Se, S and Te from VI group of the Periodic Table. A variety of stable glasses have been prepared in bulk, fiber, thin film and multilayer forms using melt quenching, vacuum deposition and various other less common techniques These glasses are being used in computer memories, erasable high density optical memories, photoconductive applications such as photoreceptors in copying machines and X-ray imaging plates, I.R. optical lenses and windows and high sensitivity ionic sensors [1]-[4] using silver doped chalcogenide glasses. The electrical, optical and structural properties of Ag doped chalcogenide glasses have been studied by various workers [25]-[27] but no serious attempts have been made to report specific heat studies in these materials [28]. This motivated us to start work in this direction. The present paper reports the effect of Ag additives on the specific heat in binary Se80Te20 alloy
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