Solid State Physics

Download Amorphous Chalcogenides: Advances and Applications by Rong Ping Wang PDF

By Rong Ping Wang

This publication presents a finished review of the chalcogenide glass technology and numerous functions in keeping with the glasses. It starts off with a assessment at the glass-forming skill of assorted structures, by means of a dialogue at the structural and actual houses of varied chalcolgenide glasses and their program in built-in optics. The chapters were contributed by way of favourite specialists from in every single place the Read more...

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At low average coordination, the glass is composed of long one-dimensional chains that also adopt a fragile behavior, while at high values As-rich zero-dimensional cage molecules precipitate out of the network, also leading to increased fragility. This structural evolution has indeed been well characterized spectroscopically [43, 54]. The behavior of these two systems therefore emphasizes the role of network dimensionality in controlling glass formers’ fragility and its potentially competing effect with structural rigidity.

And Bowden B. , Deformation and cracking in Ge-Sb-Se chalcogenide glasses during indentation. J. Am. Ceram. , 90, 177–183 (2007). , Halfpap B. , Green J. , Lindsay S. , and Angell C. , Fragility of germanium-arsenic-selenium glass-forming liquids in relation to rigidity percolation, and the Kauzmann paradox. Phys. Rev. , 64, 1549–1552 (1990).

This determines how fast the system drops out of equilibrium upon cooling below the glass transition and consequently deϐines the magnitude of the driving force for relaxation that has built up at room temperature [22]. These issues may be of minimal practical importance in oxide glasses where the glass transition temperature Tg is so far above the room temperature that no measurable relaxation can be observed within laboratory timescales [23]. However, this is not the case with chalcogenide glasses that typically exhibit a low Tg in the range 100–400°C and can therefore undergo signiϐicant thermal relaxation even at ambient temperature [24–26].

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