Double glass transition and double stage crystallization of bulk $Si_{20}Te_{80}$ glass

Asokan, S and Parthasarathy, G and Gopal, ESR (1985) Double glass transition and double stage crystallization of bulk $Si_{20}Te_{80}$ glass. In: Journal of Materials Science Letters, 4 (5). pp. 502-504.

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Abstract

The phenomenon of phase separation and double stage crystallization in chalcogenide glasses is an unusual property of considerable interest. In continuation of the work of $Ge_{20}Te_{80}$ and $Al_{23}Te_{77}$ [1-3], the crystallization of bulk $Si_{20}Te_{80}$ glass has been studied. The crystallization processes are intimately related to the short range order present in the glassy state. In most glasses, the glass to supercooled liquid transition precedes the crystallization, when the glass is heated, in say a DSC run. Some glasses show an interesting behaviour, the so-called "double glass transition phenomena". The well known examples are Te-Ge-Se [4], $Te_{80}Ge_{12.5}Pb_{7.5}$ [5], $(Pd_5Ni_5)_{1-y}P_y$ [6], Te-Si- Pb [7], $Ge_{20}Te_{80}$ [1] and $Al_{23}Te_{77}$ [2, 3, 8]. In this study of glass $Si_{20}Te_{80}$ sample, a similar double glass transition phenomena, associated with double stage crystallization, is observed.

Item Type:	Journal Article
Publication:	Journal of Materials Science Letters
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Springer.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	15 Jul 2008
Last Modified:	19 Sep 2010 04:47
URI:	http://eprints.iisc.ac.in/id/eprint/14985

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