Calorimetric studies of $Al_xTe_{l00-x}$ glasses: composition dependence of crystallization and a new compound in the A1-Te system

Ramakrishna, R and Asokan, S and Parthasarathy, G and Titus, SSK and Gopal, ESR (1992) Calorimetric studies of $Al_xTe_{l00-x}$ glasses: composition dependence of crystallization and a new compound in the A1-Te system. In: Journal of Non-Crystalline Solids, 139 . pp. 129-136.

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Abstract

Bulk, semiconducting $Al_xTe_{l00-x}$ glasses have been prepared by quenching from the melt. The thermal crystallization behaviour of these materials has been studied by differential scanning calorimetry. $Al_xTe_{l00- x}$ glasses with $15\leq x \leq 23$ have been found to exhibit a double glass transition and double stage crystallization on heating. Glasses with $28 \geq x \geq 25$ show only a single glass transition and single stage crystallization. The observed cross-over in the thermal crystallization behaviour can be connected to rigidity percolation in the chalcogenide glasses. Further, the thermal annealing of $Al_xTe_{l00-x}$ glasses leads to a new phase $\phi(AI-Te)$, which is not the equilibrium crystalline phase $Al_2Te_3$ of the A1-Te system.

Item Type:	Journal Article
Publication:	Journal of Non-Crystalline Solids
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics Division of Physical & Mathematical Sciences > Physics
Date Deposited:	31 Oct 2006
Last Modified:	22 Dec 2010 10:09
URI:	http://eprints.iisc.ac.in/id/eprint/8341

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