The effect of sodium ⇌ silver exchange on the electrical properties of glasses in the systems Na2O-B2O3-SiO2-Al and Na2O-B2O3-Al have been investigated. In general, the ion-exchange step lowers the resistivity as well as the activation energy for conduction. The glasses have a highly inhomogeneous structure. The ion-exchanged glasses are characterized by a semi continuous silver-rich phase. These glasses can be switched to a highly conducting state by subjecting them to a critical electric field which varies from 0.2 to 5 vcm−1 depending on temperature and the virgin glass composition. The resistivities in the highly conducting state have values in the range 3 to 10 Ω cm with activation energies varying from 0.002 to 0.008 eV. Wagner's asymmetric polarization cell measurements show that such high conductivity is electronic in nature.
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Agarwal, P., Roy, S. & Chakravorty, D. Electrical conductivity of ion-exchanged oxide glasses containing aluminium dispersoids. J Mater Sci 26, 3643–3648 (1991). https://doi.org/10.1007/BF00557157
- Activation Energy
- Electrical Conductivity
- Electrical Property