DC and Thermal Conductivity of Lithium Zinc Phosphate Glasses

Abstract

The phosphate glasses, with composition (60-x)P2O5-25ZnO-(15+x)Li2O where 0.0 ≤ x ≤ 5.0 mol% are prepared by conventional melt quenching method. The amorphous nature of the glass is determined by X-Ray Diffraction (XRD). The physical properties are measured in term of their density and molar volume. Glass density is found to increase from 2.700 to 2.785 g cm-3 whereas molar volume is found to decrease from 40.735 to 37.488 cm3 mol-1 with respect to Li2O content. The DC measurements are done by using four point probes and the activation energies are determined. Arrhenius plot shows straight line behavior as observed that confirmed the conductivity increased with Li2O content. The activation energy is found to decreases from 0.75 to 0.08 eV as Li2O content is increased in the temperature range from 310 to 420 K. Measurements of the thermal conductivity using Lee’s disc apparatus have been made. It is observed that the maximum and minimum thermal conductivity are 0.2679 and 0.2168 W m-1 K-1 respectively.

Li2O-ZnO-MoO3-SeO2 glass-nanocomposites and their crystalline counterparts: microstructure, electrical transport mechanism and first principle DFT analysis

“…AC conductivity spectra [12,13,15,27] have been studied and analyzed at numerous temperatures using equation (2) and such spectra at a particular temperature for glass-nanocomposites and their crystalline counterparts have been presented in figure 7. For comparison, complex impedance plots for x=0.1 and its crystalline counterpart are included in the inset of figure 7.…”

“…Initiatives [12] have been taken to enhance conductivity in lithium-ion conducting glassy systems using the mechanism of dissolving alkali oxides such as Li 2 O, LiCl and Na 2 O into other oxide glassy matrices, which may be caused due to mixed former effects. Recent developments [13] on electrical and thermal conductivity of P 2 O 5 -ZnO-Li 2 O glassy systems have clearly exhibited how the incorporation of Li 2 O acts as a major part of the process of modification of the network structure. It is also observed that high amounts of Li + and their small inter-particle contacts are responsible for thermal conductivity up to an extent in this glassy system due to high lattice waves.…”