Fast ion conduction in lithia-containing glasses after ion exchange

Chakravorty, D. ; Kumar, A. ; Roy, S. (1990) Fast ion conduction in lithia-containing glasses after ion exchange Journal of Physics D: Applied Physics, 23 (4). pp. 429-433. ISSN 0022-3727

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High electrical conductivity has been induced in silicate glasses containing Li2O after subjecting them to a lithium/silver ion exchange treatment followed by a suitable combination of temperature and electric field. The room-temperature resistivities of these switched samples range from 50 Ω cm to 1000 Ω cm. The activation energy for conduction has values in the range 0.01 to 0.16 eV. The critical electric field for switching is found to be of the order of a few volts per centimetre. The field-induced switching is explained on the basis of growth of a silver-rich phase to the percolation configuration. Wagner's asymmetric polarisation cell measurements show that the charge carriers are ionic in the glasses in their highly conducting states.

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Deposited On:15 Oct 2011 12:07
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