The structure and ionic conductivity of glasses were investigated by using infra-red spectroscopy and electrical techniques. It was noted that the Te-OA bond, where A represented the axial position of the TeO4 trigonal bipyramid, became weaker upon increasing the LiCl content in binary LiCl-TeO2 glasses. This indicated that LiCl acted as a network modifier. On the other hand, a gradual increase in the wave number of the peak which was due to the Te-OA bond was observed when Li2O was replaced by LiCl. This was attributed to a difference in the bonding characteristics of Te-OE and Te-ClE bonds, where E represented the equatorial position. The electrical conductivity of glasses with a high concentration of Li+ ions attained 10-6S/cm at 25C. This was comparable to that of other fast Li-ion conducting glasses. The compositional dependence of the conductivity was explained in terms of the glass structure; especially with regard to the bonding characteristics of Te-Cl and Te-O.

K.Tanaka, T.Yoko, H.Yamada, K.Kamiya: Journal of Non-Crystalline Solids, 1988, 103[2-3], 250-6