Ionic Conductivity and Glass Transition of Phosphoric Acids

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• 作者：Yangyang Wang ; Nathan A. Lane ; Che-Nan Sun ; Fei Fan ; Thomas A. Zawodzinski ; Alexei P. Sokolov
• 刊名：The Journal of Physical Chemistry B
• 出版年：2013
• 出版时间：July 3, 2013
• 年：2013
• 卷：117
• 期：26
• 页码：8003-8009
• 全文大小：385K
• 年卷期：v.117,no.26(July 3, 2013)
• ISSN：1520-5207

文摘

Here we report the low-temperature dielectric and viscoelastic properties of phosphoric acids in the range of H₂O:P₂O₅ 1.5鈥?. 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.