Viscosity of glass-forming liquids

John C. Mauro, Yuanzheng Yue, Adam J. Ellison, Prabhat K. Gupta, Douglas C. Allan

Research output: Contribution to journalArticlepeer-review

544 Scopus citations

Abstract

The low-temperature dynamics of ultraviscous liquids hold the key to understanding the nature of glass transition and relaxation phenomena, including the potential existence of an ideal thermodynamic glass transition. Unfortunately, existing viscosity models, such as the Vogel-Fulcher-Tammann (VFT) and Avramov-Milchev (AM) equations, exhibit systematic error when extrapolating to low temperatures. We present a model offering an improved description of the viscosity-temperature relationship for both inorganic and organic liquids using the same number of parameters as VFT and AM. The model has a clear physical foundation based on the temperature dependence of configurational entropy, and it offers an accurate prediction of low-temperature isokoms without any singularity at finite temperature. Our results cast doubt on the existence of a Kauzmann entropy catastrophe and associated ideal glass transition.

Original languageEnglish (US)
Pages (from-to)19780-19784
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume106
Issue number47
DOIs
StatePublished - Nov 24 2009

All Science Journal Classification (ASJC) codes

  • General

Fingerprint Dive into the research topics of 'Viscosity of glass-forming liquids'. Together they form a unique fingerprint.

Cite this