Rao, KJ and Kumar, Sundeep and Bhat, MH (2001) A chemical approach to understand fragilities of glass-forming liquids. In: Journal of Physical Chemistry B, 105 (38). pp. 9023-9027.
PDF
A_Chemical_Approach.pdf - Published Version Restricted to Registered users only Download (71kB) | Request a copy |
Abstract
Fragility is viewed as a measure of the loss of rigidity of a glass structure above its glass transition temperature. It is attributed to the weakness of directional bonding and to the presence of a high density of low-energy configurational states. An a priori fragility function of electronegativities and bond distances is proposed which quite remarkably reproduces the entire range of reported fragilities and demonstrates that the fragility of a melt is indeed encrypted in the chemistry of the parent material. It has also been shown that the use of fragility-modified activation barriers in the Arrhenius function account for the whole gamut of viscosity behavior of liquids. It is shown that fragility can be a universal scaling parameter to collapse all viscosity curves on to a master plot.
Item Type: | Editorials/Short Communications |
---|---|
Publication: | Journal of Physical Chemistry B |
Publisher: | American Chemical Society |
Additional Information: | Copyright of this article belongs to American Chemical Society. |
Department/Centre: | Division of Chemical Sciences > Solid State & Structural Chemistry Unit |
Date Deposited: | 02 Aug 2011 09:44 |
Last Modified: | 02 Aug 2011 09:44 |
URI: | http://eprints.iisc.ac.in/id/eprint/39320 |
Actions (login required)
View Item |