Ionic conductivity in lithium aluminosilicate xerogels and gel films

L. Laby, L. C. Klein, J. Yan, M. Greenblatt

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4 Scopus citations


Xerogel formulations containing x = 3, 5, 10 and 14 mol% of alumina were prepared in the 15 mol% lithia - (85 - x) mol% silica system. The precursor for the silica was tetraethylorthosilicate (TEOS). Lithium and aluminum nitrates dissolved in water/ethanol mixtures were used for the other components. Bulk gels were dried for measurement of ionic conductivity, using ac complex impedance spectroscopy over the temperature range room temperature (23 °C) to 350 °C. A thin film was prepared, as well, on an electroded surface acoustic wave (SAW) device. The conductivities of the thin film and the corresponding xerogel of the same composition were similar and showed the same temperature dependence. Conductivities were as high as 10-6 S/cm and stable. The ionic conductivity at a given temperature increased with increasing substitution of alumina for silica.

Original languageEnglish (US)
Pages (from-to)217-224
Number of pages8
JournalSolid State Ionics
Issue number3-4
StatePublished - Nov 1 1995

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


  • Ionic conductivity - lithium
  • Lithium aluminosilicate
  • Xerogel film

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