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Glass formation in germanium telluride glasses containing metallic additives

Ramesh, K and Ashokan, S and Sangunni, KS and Gopal, ESR (2000) Glass formation in germanium telluride glasses containing metallic additives. In: Journal of the Physics and Chemistry of Solids, 61 (1). pp. 95-101.

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Abstract

Differential scanning calorimetric (DSC) studies have been carried out on germanium telluride glasses containing Cu and Ag. Both $Cu_xGe_{15}Te_{85-x}$ $(2\leq x \leq 10)$ and $Ag_xGe_{15}$Te_{85-x}$ $(2.5 \leq x \leq 21.5) glasses are found to exhibit single glass transition and single crystallization. On the basis of the devitrification behaviour of these glasses one can conclude that the network connectivity of the parent Ge–Te matrix is not improved by the addition of Cu whereas Ag improves the connectivity. Overconstraining of the structural network for x > 5 is rapid in Cu added glasses and more gradual in Ag added glasses. The difference in the glass formation in the Cu–Ge–Te and Ag–Ge–Te systems is understood in light of the above differences in the structural network.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation and Applied Physics (Formally ISU)
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 05 Jul 2006
Last Modified: 19 Sep 2010 04:29
URI: http://eprints.iisc.ernet.in/id/eprint/7850

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