Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 121, Issue 16, Pages 8738-8745Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.7b01121
Keywords
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Funding
- Department of Science and Technology (DST), Government of India [SB/S2/JCB-33/2014]
- SERB-DST [EMR/2015/000149]
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We have studied and observed a mixed glass former effect in yAg(2)O-(1-y)[xSeO(2)-(1-x)TeO2] glasses for different modifier contents. We have carried out electrical measurements on these glasses in the frequency range from 10 Hz to 2 MHz and in the temperature range of 193-393 K. The crossover frequency obtained from the conductivity spectra also exhibits a mixed glass former effect similar to the conductivity. The scaling of the conductivity spectra reveals the composition and temperature-independent nature of the ion conduction mechanism. The characteristic displacement of the silver ions has been obtained from the conductivity spectra in the framework of linear response theory, and it shows a strong dependence on the mixed former ratio. We have also studied the modification of the network structure of these glasses due to the mixing of glass formers using infrared spectra and their influence on ion dynamics. We have shown that the mixed glass former effect is associated with the relative population of bonds of structural units.
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