| Autor: |
Reddy, N. Sivasankara, Sujatha, B., Venkatesh, R., Chandrashekaraiah, G., Siddalingeshwara, B P, Shankar, P., Murali, K., Reddy, C. Narayana, Jayasheelan, A. |
| Zdroj: |
Ionics; Jan2024, Vol. 30 Issue 1, p183-198, 16p |
| Abstrakt: |
Electrical conductivity and dielectric studies of xLi2SO4-30Li2O-(70-x)[0.70P2O5:0.30V2O5], (5 ≤ x ≤ 25 mol%) glasses are carried out over a frequency range from 10 Hz to 10 MHz and in a temperature range of 383 K to 453 K. Addition of Li2O modifies the phosphate network and generates non-bridging oxygens in the glass structure. The observed increase in dc conductivity is due to the enhancement in the structural volume, consequently the percolation paths are widened as result of volume increasing effect caused by isotropic dissolution of Li2SO4. This dissolution facilitates easier mobility of Li+ ions. A.C conductivity obeys the Jonscher power law and the power law exponent 's' exhibits a minimum and shows temperature dependence. s is in the range of 0.525—0.549, activation energy for d.c conductivity is in the range of 1.07—0.58 eV and activation energy for a.c conductivity is the range of 1.20—0.60 eV. The conductivity relaxation process is explained using the Kohlrausch–Williams–Watts stretched exponential correlation function. Further, the scaling of both conductivity and electrical modulus data showed an excellent collapse onto a single curve indicating a single ion transport mechanism operating in these glasses. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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