Correlation of Ionic Conductivity of Lithium Borosilicotitanate Glasses with Structure

Abstract

Lithium ion conducting glasses containing TiO2 have been prepared by the conventional melt quenching technique. Electrical conductivity σdc, activation energy Ea, density ρ, molar volume Vm, coefficient of thermal expansion (CTE) and glass transition temperature Tg for all the glass samples were measured. The variation of electrical conductivity with addition of TiO2 in lithium borosilicate system has been studied. The FTIR spectroscopy has been used for structural studies of these glasses. The decrease in conductivity with the addition of TiO2 at the cost of modifier Li2O is explained on the basis of changes in glass structure revealed by the IR spectrum which is also supported by the Tg, density and CTE variation. The electrical modulus spectra of the glasses have been studied to understand the conduction mechanism.