Sural, M. ; Ghosh, A. (1999) Conductivity and relaxation in ZrF4-BaF2-YF3-LiF glasses: effect of substitution of BaF2 by LiF Solid State Ionics, 126 (3-4). pp. 315-321. ISSN 0167-2738
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/S0167-2738(99)00249-0
Abstract
The dc conductivity and the conductivity relaxation of ZrF4-BaF2-YF3-LiF glasses with varying BaF2 and LiF contents have been studied in the temperature range from 300 K to just below the glass transition temperature and in the frequency range 10 Hz-2 MHz. It has been observed that the conductivity shows a minimum and the activation energy a maximum at ~20 mol% LiF content. The glass decoupling index also shows a minimum at the same composition and has been associated with the minimum of the conductivity. The small variation of the relaxation parameter β for the low LiF content is consistent with the weak coupling model. The relaxation parameter β exhibits a minimum at a composition different from that of the conductivity, resulting from the competitive influence of Ba2+ and Li+ cations on the ionic mobility.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 72855 |
| Deposited On: | 29 Nov 2011 13:01 |
| Last Modified: | 29 Nov 2011 13:01 |
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