title: Ionic conductivity and glass transition of phosphoric acids.
abstract: 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.
authors.affiliation: Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA. wangy@ornl.gov
authors.forename: Yangyang
authors.initials: Y
authors.lastname: Wang
authors.forename: Nathan A
authors.initials: NA
authors.lastname: Lane
authors.forename: Che-Nan
authors.initials: CN
authors.lastname: Sun
authors.forename: Fei
authors.initials: F
authors.lastname: Fan
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Zawodzinski
authors.forename: Alexei P
authors.initials: AP
authors.lastname: Sokolov