Ionic Ckonductivity and Glass Transition of Phosphoric Acids

Journal Article · Tue Jan 01 00:00:00 EST 2013 · Journal of Physical Chemistry B

DOI:https://doi.org/10.1021/jp403867a· OSTI ID:1096334

Wang, Yangyang ^[1]; Lane, Nathan A ^[1]; Sun, Che-Nan ^[2]; Fan, Fei ^[1]; Zawodzinski, Thomas ^[3]; Sokolov, Alexei P ^[1]

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1. ORNL
2. Oak Ridge National Laboratory (ORNL)
3. University of Tennessee, Knoxville (UTK)

Here we report the low-temperature dielectric and viscoelastic properties of phosphoric acids in the range of H2O:P2O5 1.5 5. Both dielectric and viscosity measurements allow us to determine the glass-transition temperatures of phosphoric acids. The obtained glass-transition temperatures are in good agreement with previous differential scanning calorimetric measurements. Moreover, our analysis reveals moderate decoupling of ionic conductivity from structural relaxation in the vicinity of the glass transition.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1096334
• Journal Information: Journal of Physical Chemistry B, Vol. 117, Issue 26; ISSN 1520--6106
• Country of Publication: United States
• Language: English