Scaling features of conductivity spectra reveal complexities in ionic, polaronic and mixed ionic-polaronic conduction in phosphate glasses
Source abstract
Abstract
The scaling behaviour of six series of mixed ion-polaron glasses with the composition xWO 3/MoO 3-(30–0.5 x)Li 2O/Na 2O/Ag 2O-(30–0.5 x)ZnO-40P 2O 5, 0 ≤ x ≤ 60 mol%, has been studied using Summerfield and Sidebottom scaling procedures that are model free. The validity of the Sidebottom scaling procedure for each individual glass confirms that all glasses obey time-temperature superposition principle implying that the conduction mechanism does not change with temperature. On the other hand, Summerfield scaling is not found valid for all glasses. First, this deviation is observed in all glasses containing Li 2O up to 20 mol% of MoO 3/WO 3. We relate this result to a non-typical interaction of Li + ion with the compact zinc phosphate network resulting either in change of its hopping distance or in available conduction pathways for it as a function of temperature. Second, non-Summerfield scaling was also observed for glasses containing Li 2O/Na 2O/Ag 2O with about 30 to 40 mol% of WO 3. Thus, the origin of this deviation lies in the significant amounts of both types of charge carriers - ions and polarons, and their differently thermally activated mobilities.
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Research context
OpenAlex topics: Glass properties and applications · Luminescence Properties of Advanced Materials · Phase-change materials and chalcogenides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
Show source-provided references
1. The ‘universal’ dielectric response10.1038/267673a0 ↗
2. Dielectric dispersion in amorphous conductors10.1016/0022-3093(70)90063-3 ↗
3. The electrical properties of glasses10.1016/0022-3093(77)90099-0 ↗
4. Scaling and universality of ac conduction in disordered solids10.1103/PhysRevLett.84.310 ↗
5. Conduction in glasses containing transition metal ions10.1016/0022-3093(68)90002-1 ↗
6. Electrical properties of semiconducting oxide glasses10.1016/0022-3093(79)90066-8 ↗
7. The interpretation of non-ideal dielectric admittance and impedance diagrams10.1002/pssa.2210320241 ↗
8. Jonscher · 1996
9. The random free-energy barrier model for ac conduction in disordered solids10.1063/1.341681 ↗
10. Ionic and polaronic glassy conductors: conductivity spectra and implications for ionic hopping in glass10.1016/0167-2738(96)00073-2 ↗
11. On the conduction mechanism in ionic glasses10.1063/1.480081 ↗
12. Universality of ac conduction in disordered solids10.1103/RevModPhys.72.873 ↗
13. Modelling frequency-dependent conductivities and permittivities in the framework of the MIGRATION concept10.1016/j.ssi.2003.06.003 ↗
14. Frequency-dependent conductivity in ionically and electronically conducting amorphous solids10.1016/0167-2738(94)90284-4 ↗
15. Universal low-frequency behaviour in the a.c. hopping conductivity of disordered systems10.1080/13642818508243162 ↗
16. Carrier concentrations and relaxation spectroscopy: new information from scaling properties of conductivity spectra in ionically conducting glasses10.1103/PhysRevLett.78.2160 ↗
17. Scaling behaviour in the frequency dependent conductivity of mixed alkali glasses10.1016/S0167-2738(98)00210-0 ↗
18. Scaling properties of the conductivity spectra of glasses and supercooled melts10.1016/S0167-2738(97)00463-3 ↗
19. Universal approach for scaling the ac conductivity in ionic glasses10.1103/PhysRevLett.82.3653 ↗
20. Polaronic conductivity and scaling behavior of lithium iron phosphate glass10.1063/1.5032924 ↗
21. Fundamental questions relating to ion conduction in disordered solids10.1088/0034-4885/72/4/046501 ↗
22. Polaronic transport in iron phosphate glasses containing HfO2 and CeO210.1039/C6CP04226K ↗
23. Pavić · 2019
24. Ion dynamics in mixed alkali glasses10.1039/b200610n ↗
25. Ionic transport in oxide glasses and frequency dependence of conductivity10.1002/bbpc.19910950913 ↗
26. Nonuniversal features of the ac conductivity in ion conducting glasses10.1103/PhysRevLett.85.1274 ↗
27. Dielectric function and localized diffusion in ion conducting glasses10.1016/j.ssi.2004.09.063 ↗
28. Ion dynamics in mixed alkali borate glasses
29. Insights into ion-network interactions and ion transport in glasses
30. Insights from local network structures and localized diffusion on the ease of lithium ion transport in two mixed glass-former systems10.1021/acs.jpcc.7b05108 ↗
31. Novel insights into electrical transport mechanism in ionic-polaronic glasses10.1111/jace.15271 ↗
32. Nature of mixed electrical transport in Ag2O-ZnO-P2O5 glasses containing WO3 and MoO310.1016/j.electacta.2018.04.029 ↗
33. Colloquium: understanding ion motion in disordered solids from impedance spectroscopy scaling10.1103/RevModPhys.81.999 ↗
34. Ac conductivity spectra of alkali tellurite glasses: composition-dependent deviations from the Summerfield scaling10.1103/PhysRevLett.89.195902 ↗
35. Ionic transport in glassy networks with high electronic Polarizabilities: conductivity spectroscopic results indicating a vacancy-type transport mechanism10.1021/jp036226g ↗
36. Scaling of the ac permittivity in ion-conducting glasses10.1103/PhysRevB.62.5503 ↗
37. Characterization and conductivity of lithium, sodium, and silver metaphosphate glasses over wide frequency and temperature ranges10.13036/17533562.59.2.042 ↗
38. Structure and solubility behaviour of zinc containing phosphate glasses10.1039/C4TB01504E ↗
39. The number density of mobile ions (Li+, Na+, Ag+) is calculated from the glass composition and density whereas the number density of polarons is determined as a product of the number density of the total tungsten/molybdenum ions and fraction of tungsten/molybdenum ions in lower valence states, (W5+/Wtot, Mo5+/Motot). The values of density, W5+/Wtot and Mo5+/Motot are given in Refs 31 and 32.