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Influence of grain sizes on the ionic conductivity and the chemical diffusion coefficient in copper selenide |
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| Authors: | M Kh Balapanov E K Urazaeva I B Zinnurov R Sh Musalimov R A Yakshibaev |
| Institution: | (1) Bashkir State University, Frunze Street 32, 450074 Ufa, Bashkortostan, Russia;(2) Institute for Metals Superplasticity Problems of Russian Academy of Sciences, Khalturin Street 39, 450001 Ufa, Bashkortostan, Russia |
| Abstract: | Ionic conductivity and chemical diffusion coefficient have been studied for superionic polycrystalline Cu1.75Se copper selenide within the temperature interval 300–500 K. An increase in ionic conductivity with an grain size increase is observed. In our opinion, this fact is caused by lower activation energy for the bulk diffusion than that for the grain boundary diffusion. |
| Keywords: | Ionic conductivity Diffusion Grain boundary Structural disorder Chalcogenides |
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