Lithium ion transport in Li2SO4–Li2O–B2O3 glasses
Electrical conductivity and dielectric relaxation studies with a wide range of compositions of lithium ion conducting glasses belonging to the ternary glass system Li2SO4–Li2O–B2O3 have been carried out over the temperature range 150–450 K and between 10–107 Hz. DC conductivities exhibit two different activation regions. This seems to suggest the presence of a cluster tissue texture in these glasses with weakly ordered clusters of Li2SO4 and lithium borates being held together by a truly amorphous tissue of the same average composition as clusters. AC conductivity behaviour of these glasses has been analysed using both power law and stretched exponential relaxation functions. The variation of the power law exponent s and the stretched exponent β with temperature seems to be consistent with the presence of a cluster tissue texture in these glasses.
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Document Type: Research Article
Affiliations: Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India
Publication date: December 1, 1999