Conductivity enhancement in heterophase glasses after ion-exchange treatment

Chakravorty, D. ; Mathews, T. (1989) Conductivity enhancement in heterophase glasses after ion-exchange treatment Journal of Physics D: Applied Physics, 27 (1). pp. 149-153. ISSN 0022-3727

Full text not available from this repository.

Official URL: http://iopscience.iop.org/0022-3727/22/1/021

Related URL: http://dx.doi.org/10.1088/0022-3727/22/1/021

Abstract

The effect of sodium to or from silver ion exchange on electrical conductivity has been investigated for some heterophase glasses containing bismuth oxide. The electrical resistivity in ion-exchanged samples decreases by several orders of magnitude when they are subjected to an electrical field of about 10-30 V cm−1 at around 300°C. Polarisation experiments carried out on samples in such a highly conducting state show that the electrical transport is ionic in nature. The switching to these states is believed to arise as a result of the growth of a silver-rich phase to a percolation configuration. The resistivities of these phases are in the range 10-103 Ω cm with low activation energy values. The results suggest that these materials may constitute a new class of superionic conductors.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics.
ID Code:64883
Deposited On:14 Oct 2011 12:17
Last Modified:14 Oct 2011 12:17

Repository Staff Only: item control page