Dielectric features, relaxation dynamics and a.c. conductivity studies on Ag+ mixed lead arsenate glass ceramics

Kumar, K. Naresh; Kostrzewa, M.; Ingram, Adam; Suresh, B.; Reddy, A. Siva Sesha; Gandhi, Y.; Piasecki, M.; Veeraiah, N.

doi:10.1007/s10854-017-8018-8

Cited by 14 publications

(5 citation statements)

References 42 publications

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“…The SPR occurs with the interaction of coherent oscillations of exterior electrons of Ag + –Ag 0 pairs and the incident e.m. beam, causing the observed absorption peak. [ 33 ] Intensity of this band indicated the maximum of Ag + ions’ concentration and Ag 0 MPs in the spectrum of Ag 6 sample. The metacenter of this band shifted toward longer wavelength as Ag 2 O content was raised to 0.6 mol% and indicated increased dimensions of Ag 0 MP clusters.…”

Section: Resultsmentioning

confidence: 99%

The Influence of Silver Ions on the Dielectric Dispersion Dipolar Relaxation Dynamics and Dielectric Breakdown Strength of Zinc Selenium Phosphate Glass System

Reddy

Kostrzewa

Sekhar

et al. 2023

Physica Status Solidi (a)

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This research paper presents a study on dielectric properties of ZnO‐P2O5‐SeO2 glass ceramics containing varied contents of silver oxide. The structural analysis of the prepared samples was performed using XRD, TEM, DSC, FT‐IR spectra, and optical absorption (OA) techniques. These studies indicated the samples were embedded with Ag3PO4, Ag2SeO3 and Zn3(PO4)2 anisotropic crystal phases along with Ag+ ions and Ag0 metallic particles. Dielectric properties, a.c. conductivity (σ ac ) and dielectric breakdown strength (DBS) were investigated as functions of Ag2O concentration over wide ranges of temperature and frequency. The results showed that the maximal concentration of Ag+ ions and Ag0 metallic particles in the sample doped with 0.6 mol % of Ag2O. Dielectric parameters and σ ac were found to increase with an increase in Ag2O content up to 0.6 mol %, while the DBS and electrical impedance gradually decreased. The dipolar effects exhibited by these samples were quantitatively analysed and the possible dipoles for such effects were recognised. The ionic contribution to a.c. conduction was predominant up to 0.6 mol % of Ag2O, beyond which the polaronic tunnelling phenomenon prevailed. Based on these findings, it was concluded that 0.6 mol % of Ag2O is the optimal concentration for using these glass ceramics as solid electrolytes in ionic batteries. Moreover, glass ceramics containing Ag2O beyond 0.6 mol%, have exhibited larger polaronic conductivity, hence such samples can be considered as suitable candidates for electrodes in ionic batteries.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

The Influence of Silver Ions on the Dielectric Dispersion Dipolar Relaxation Dynamics and Dielectric Breakdown Strength of Zinc Selenium Phosphate Glass System

Reddy

Kostrzewa

Sekhar

et al. 2023

Physica Status Solidi (a)

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“…Figure shows ln( τ max ) as a function of 1000/ T , which allows calculating the activation energies for the different glass structures. This kind of analysis is helpful to evaluate the relaxation kinetics, providing an insight of the electric dipoles easiness to follow the applied electric field, which in several reports is used as an indicator of the glass network polymerization degree …”

Section: Resultsmentioning

confidence: 99%

Dielectric relaxation in glass and glass‐ceramic materials of the system La₂O₃‐Gd₂O₃‐PbO‐MnO‐B₂O₃

Raykov

Staneva

Dimitriev

et al. 2018

Int J of Appl Glass Sci

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The electrical properties of new borate‐based glasses in the system La2O3‐Gd2O3‐PbO‐MnO2‐B2O3, prepared by the melt‐quenching technique, were investigated. All of these glasses have a fixed content of B2O3 (%mol = 30). The electrical measurements were carried out by impedance spectroscopy in the frequency range from 100 Hz to 1 MHz, and temperatures from 100 to 400°C, below the glass temperature. The AC conductivity increases with temperature according to the Arrhenius law, with a single activation energy. The structural and thermal properties of the glasses were investigated by performing infrared spectroscopy, X‐ray diffraction, and differential thermal analysis. The dependence of the various electrical parameters as a function of the glass composition and temperature was discussed. Evaluations of models and theory of the relaxation mechanisms were predominantly made through comparison with experimental data and a set of phenomenological parameters.

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“…Complex impedance plots measured at 308 K for a sample (l/S = 0.413 cm −1 ) heat-treated at T f1 -25 K = 695 K by t 0 = 0 s, t 1 = 300 s, t 2 = 900 s, t 3 = 2100 s, t 4 = 4500 s, t 5 = 9900 s, t 6 = 20 700 s, t 7 = 42 300 s, t 8 = 85 500 s, t 9 = 171 900 s, t 10 = 344 700 s, and t 11 = 690 300 s. sample aged at T f1 − 25 K for different times-the plots for other aging temperatures are provided in Figures S1-S3. It is important to emphasize that, unlike some authors, 37,43,44 we did not measure the electrical relaxation, which leads to a very fast relaxation behavior. Instead, the inverse of ionic conductivity (ionic resistivity, ρ) was promptly read at the low-frequency intersection of the semicircle with the x-axis, because the impedance results were normalized by the geometrical factor of the sample (l/S, respectively, sample thickness and area).…”

Section: F I G U R Ementioning

confidence: 91%

Structural relaxation dynamics of a silicate glass probed by refractive index and ionic conductivity

2023

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Relaxation occurs spontaneously in all glasses and is a fundamental step of important technological processes, such as annealing, crystal nucleation, and chemical strengthening by ion exchange. Despite extensive studies over the past decades, there are still conflicting results on whether the kinetics of structural relaxation depends on the analyzed property. Thus, in this study, we used a lithium disilicate glass as a model composition to determine the structural relaxation kinetics during physical aging experiments by measuring the time evolution of the refractive index and ionic conductivity down to 35 K below the initial fictive temperature. In all cases, variations in these properties were adequate to capture the structural changes throughout the aging experiments.At each temperature, the experimental relaxation data fit quite well with the classical stretched exponential relation. We also found that the relaxation process starts faster when probed by ionic conductivity than by refractive index; however, they show similar average relaxation times. These very small structural rearrangements are always the same, but ionic conductivity changes faster than refractive index at the beginning of the process. Our comprehensive results strongly indicate that relaxation dynamics is indeed dependent on the analyzed property.

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Dielectric features, relaxation dynamics and a.c. conductivity studies on Ag+ mixed lead arsenate glass ceramics

Cited by 14 publications

References 42 publications

The Influence of Silver Ions on the Dielectric Dispersion Dipolar Relaxation Dynamics and Dielectric Breakdown Strength of Zinc Selenium Phosphate Glass System

The Influence of Silver Ions on the Dielectric Dispersion Dipolar Relaxation Dynamics and Dielectric Breakdown Strength of Zinc Selenium Phosphate Glass System

Dielectric relaxation in glass and glass‐ceramic materials of the system La₂O₃‐Gd₂O₃‐PbO‐MnO‐B₂O₃

Structural relaxation dynamics of a silicate glass probed by refractive index and ionic conductivity

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Dielectric features, relaxation dynamics and a.c. conductivity studies on Ag+ mixed lead arsenate glass ceramics

Cited by 14 publications

References 42 publications

The Influence of Silver Ions on the Dielectric Dispersion Dipolar Relaxation Dynamics and Dielectric Breakdown Strength of Zinc Selenium Phosphate Glass System

The Influence of Silver Ions on the Dielectric Dispersion Dipolar Relaxation Dynamics and Dielectric Breakdown Strength of Zinc Selenium Phosphate Glass System

Dielectric relaxation in glass and glass‐ceramic materials of the system La2O3‐Gd2O3‐PbO‐MnO‐B2O3

Structural relaxation dynamics of a silicate glass probed by refractive index and ionic conductivity

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Dielectric relaxation in glass and glass‐ceramic materials of the system La₂O₃‐Gd₂O₃‐PbO‐MnO‐B₂O₃