Sharmila, BH and Asokan, S (2006) Effect of network connectivity on thermal properties of As30Te70-xTlx glasses. In: Philosophical Magazine Letters, 86 (3). pp. 155-163.
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Alternating differential scanning calorimetry (ADSC) studies were undertaken to investigate the effect of Tl addition on the thermal properties of As30Te70-xTlx ( 6 <= x <= 22 at%) glasses. These include parameters such as glass-transition temperature (T-g), changes in specific heat capacity (Delta C-p) and relaxation enthalpy (Delta H-NR) at the glass transition. It was found that T-g of the glasses decreased with the addition of Tl, which is in contrast to the dependence of T-g in As - Te glasses on the addition of Al and In. The change in heat capacity Delta C-p through the glass transition was also found to decrease with increasing Tl content. The addition of Tl to the As - Te matrix may lead to a breaking of As - Te chains and the formation of Tl+Te- AsTe2/2 dipoles. There was no significant dependence of the change of relaxation enthalpy, through the glass transition, with composition.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Taylor & Francis Ltd.|
|Department/Centre:||Division of Physical & Mathematical Sciences > Instrumentation and Applied Physics (Formally ISU)|
|Date Deposited:||28 Sep 2010 07:36|
|Last Modified:||28 Sep 2010 07:36|
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