Ion conductive chalcohalide glasses in LiI-Ga 2S 3-GeS 2 system
Abstract
The electric properties of LiI containing chalcohalide glasses in the system Ga 2S 3-GeS 2 were studied by means of impedance spectroscopy and potentiostatic chronoamperometry. Two sets of the samples were prepared by direct synthesis from elements and compounds in evacuated quartz ampoules. The prepared glasses were as follows: xLiI-xGa 2S 3-(100-2x)GeS 2, x = 15, 20, 25 and 20LiI-xGa 2S 3-(80-x)GeS 2, x = 0, 5, 10, 15 and 20. In the first set the concentration of LiI increased and the second set was prepared to study the influence of Ga 2S 3 on the properties of the glasses. Additional aim of this work was to compare the electric properties of LiI containing Ga 2S 3-GeS 2 glasses with analogous AgI containing Ga 2S 3-GeS 2 glasses recently studied by us. The conductivity of the LiI containing glasses in the Ga 2S 3-GeS 2 system was higher and the activation energy was lower than in the analogous AgI containing system. The residual electronic (hole) conductivity remained similar in both systems being almost negligibly low. Raman spectroscopy proved the influence of LiI as well as Ga 2S 3 on glass structure, however interpretation of Raman spectra of these glasses is complicated due to small mass difference between gallium and germanium.
- Publication:
-
Journal of Non Crystalline Solids
- Pub Date:
- June 2011
- DOI:
- 10.1016/j.jnoncrysol.2010.12.020
- Bibcode:
- 2011JNCS..357.2223K