Ion transport in hydrated sodium slicates (water glasses) of varying water content

N. J. Garcia, Malcolm David Ingram, J. C. Bazan

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Abstract

Ionic conductivities in hydrated sodium silicate gels (water glasses) of SiO2/Na2O 3.41:1 mole ratio have been obtained by impedance spectroscopy at temperatures above and below the thermally determined glass transition temperature. Conductivities at T. are in the range 10(-6) to 10(-7) S cm(-1), which are similar to those found recently in several kinds of polymer electrolyte. It is suggested that the absence of a mixed alkali effect and a strong dependence on water imply that conductivities are largely protonic in nature and involve strong interactions between protons, water molecules and the silicate framework. (C) 2002 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)113-122
Number of pages9
JournalSolid State Ionics
Volume146
DOIs
Publication statusPublished - 2002

Keywords

  • silicate gels
  • protonic conductivity
  • mixed cation effect
  • solid electrolytes
  • SI-29 NMR

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