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高等学校化学研究 ›› 2015, Vol. 31 ›› Issue (5): 858-864.doi: 10.1007/s40242-015-4467-x

• Articles • 上一篇    下一篇

Transport Properties of Alkali Fluoride High Temperature Ionic Liquids and Application of Theories of Viscous Flow

POPESCU Anamaria1,2, CONSTANTIN Virgil1,2   

  1. 1. Laboratory of Molten Salts, "Ilie Murgulescu"Institute of Physical Chemistry, Romanian Academy, Bucharest 060021, Romania;
    2. Technology Transfer Center(CTT-ICF), Bucharest 060021, Romania
  • 收稿日期:2014-12-05 修回日期:2015-03-30 出版日期:2015-10-01 发布日期:2015-10-10
  • 通讯作者: CONSTANTIN Virgil, E-mail: virgilconstantin@yahoo.com E-mail:virgilconstantin@yahoo.com

Transport Properties of Alkali Fluoride High Temperature Ionic Liquids and Application of Theories of Viscous Flow

POPESCU Anamaria1,2, CONSTANTIN Virgil1,2   

  1. 1. Laboratory of Molten Salts, "Ilie Murgulescu"Institute of Physical Chemistry, Romanian Academy, Bucharest 060021, Romania;
    2. Technology Transfer Center(CTT-ICF), Bucharest 060021, Romania
  • Received:2014-12-05 Revised:2015-03-30 Online:2015-10-01 Published:2015-10-10
  • Contact: CONSTANTIN Virgil, E-mail: virgilconstantin@yahoo.com E-mail:virgilconstantin@yahoo.com

摘要:

The transport properties of several alkali fluoride high temperature ionic liquids(LiF, NaF, KF, RbF and CsF) were studied in a range of 980-1400 K and the temperature dependences of the viscosity and density were interpreted, in agreement with the classical equations characterizing the viscous flow(Arrhenius, Batchinski, Eyring and Frenkel). The experimental results reveal the validity of these equations even at high temperatures, suggesting that no significant structural changes of alkali fluorides occurred in the studied temperature range. Our results clearly demonstrate that the mentioned thermo-physical properties can be used as powerful tools in the further investigations of the ionic interactions governing the alkali fluoride molten salts.

关键词: Ionic liquid, Alkali fluoride, Viscosity, Temperature dependence, Correlation, Fluidity

Abstract:

The transport properties of several alkali fluoride high temperature ionic liquids(LiF, NaF, KF, RbF and CsF) were studied in a range of 980-1400 K and the temperature dependences of the viscosity and density were interpreted, in agreement with the classical equations characterizing the viscous flow(Arrhenius, Batchinski, Eyring and Frenkel). The experimental results reveal the validity of these equations even at high temperatures, suggesting that no significant structural changes of alkali fluorides occurred in the studied temperature range. Our results clearly demonstrate that the mentioned thermo-physical properties can be used as powerful tools in the further investigations of the ionic interactions governing the alkali fluoride molten salts.

Key words: Ionic liquid, Alkali fluoride, Viscosity, Temperature dependence, Correlation, Fluidity