Ac conductivity and dielectric relaxation in ionically conducting soda–lime–silicate glasses

Dutta, Alo; Sinha, T.P.; Jena, Prabir Kumar; Adak, S.

doi:10.1016/j.jnoncrysol.2008.05.028

Cited by 133 publications

(68 citation statements)

References 19 publications

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“…Typical applications to silicate [125,126], borates [127,128,129] or thioborates [130], germanates [131], and phosphates [132] can be found in the literature. …”

Section: Dielectric Relaxationmentioning

confidence: 99%

Relaxation and physical aging in network glasses: a review

Micoulaut

2016

Rep. Prog. Phys.

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Abstract. Recent progresses in the description of glassy relaxation and ageing are reviewed for the wide class of network-forming materials such as GeO 2 , Ge x Se 1−x , silicates (SiO 2 -Na 2 O) or borates (B 2 O 3 -Li 2 O), all of them having an important usefulness in domestic, geological or optoelectronic applications. A brief introduction of the glass transition phenomenology is given, together with the salient features that are revealed both from theory and experiments. Standard experimental methods used for the characterization of the slowing down of the dynamics are reviewed. We then discuss the important role played by aspect of network topology and rigidity for the understanding of the relaxation of the glass transition, while also permitting analytical predictions of glass properties from simple and insightful models based on the network structure. We also emphasize the great utility of computer simulations which probe the dynamics at the molecular level, and permit to calculate various structure-related functions in connection with glassy relaxation and the physics of ageing which reveals the off-equilibrium nature of glasses. We discuss the notion of spatial variations of structure which leads to the picture of "dynamic heterogeneities", and recent results of this important topic for network glasses are also reviewed.PACS numbers: 61.43. Fs, 64.70.kj Relaxation and physical ageing in network glasses 2 Figure 1. Typical network-forming glasses: a) A stoichiometric glass former (SiO 2 , B 2 S 3 ) whose structure and network connectivity can be altered by the addition (b) of 2-fold coordinated atoms (usually chalcogens, S, Se) that lead to cross-linked chains. The structure can also be depolymerized (c) by the addition of a network modifier (alkali oxides or chalcogenides, Na 2 O, Li 2 S, etc.). Glassy dynamics depends strongly on the network topology, i.e. the way bonds and angles arrange to lead to a connected atomic network. Note that only chalcogenides can produce a mixture of these three kinds of basic networks, e.g. (1-x)Ge y Se 1−y -xAg 2 Se [2], and for the latter system x=0 corresponds to case (b), y=33% corresponds to case (c), and both conditions together (x=0,y=33 %) to case (a).

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“…Typical applications to silicate [125,126], borates [127,128,129] or thioborates [130], germanates [131], and phosphates [132] can be found in the literature. …”

Section: Dielectric Relaxationmentioning

confidence: 99%

Relaxation and physical aging in network glasses: a review

Micoulaut

2016

Rep. Prog. Phys.

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“…The M * representation is now widely used to analyze ionic conductivities by associating a conductivity relaxation time with the ionic process [22]. From Figure 3, it is obvious that at lower frequencies M′ values are very small, tend to be zero indicating the removal of electrode polarization, [23,24] while the increase of M′ with increasing frequency and reaching a maximum value M ∞ at high frequency, may be due to the distribution of relaxation processes over a range of frequencies [25]. The observed dispersion is mainly due to conductivity relaxation spreading over a range of frequencies and indicates the presence of a relaxation time, which should be accompanied by a loss peak in the diagram of the imaginary part of electric modulus versus frequency.…”

Section: Frequency Dependence Of M′ ′ and M″ ″ At Selected Temperaturesmentioning

confidence: 99%

“…The region on the left of the peak determines the range in which charge carriers are mobile over long distances, while region to the right is where carriers are confined to potential wells being mobile over short distance [24]. The disappearance of M″ peak spectra at higher temperatures is due to experimental frequency limitation.…”

Section: Frequency Dependence Of M′ ′ and M″ ″ At Selected Temperaturesmentioning

confidence: 99%

Influence of silver ion reduction on electrical modulus parameters of solid polymer electrolyte based on chitosan-silver triflate electrolyte membrane

Aziz¹,

Abidin²,

Arof³

2010

Express Polym. Lett.

191

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Abstract. The electric modulus properties of solid polymer electrolyte based on chitosan: AgCF3SO3 from 303 to 393 K have been investigated by using impedance spectroscopy. The shift of the M″ peak spectra with frequeny depends on the dissociation and association of ions. The lowest conductivity relaxation time τσ, was found for the sample with the highest conductivity. The real part of electrical modulus shows that the material is highly capacitive. The asymmetric peak of the imaginary part of electric modulus M″, predicts a non Debye type relaxation. The distribution of relaxation times was indicated by a deformed arc form of Argand plot. The increase of M′ and M″ values above 358 K can be attributed to the transformation of silver ions to silver nanoparticles. The complex impedance plots and ultraviolet-visible (UV-vis) absorption spectroscopy indicate the temperature dependent of silver nanoparticles in chitosan-silver triflate solid electrolyte. The formation of silver nanoparticles was confirmed by transmission electron microscopy (TEM). The scaling behavior of M″ spectra shows that the dynamical relaxation processes is temperature independent for aparticular composition. The β exponent value indicate that the conductivity relaxation is highly non exponential.

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“…Figure 5 shows the angular frequency dependence of the conductivity for 2 mol% fluoride doped sample. It is evident that the ac conductivities showed a low frequency independent nature (x \ 10 5 rad s -1 ), which give rise to dc conductivity arising from the random diffusion of the ionic charge carriers via activated hopping process [18]. In our work, it is mostly affected by the low-frequency and middle-frequency dependent glass (LFER) and crystal-glass interface (MFER) regions.…”

Section: Resultsmentioning

confidence: 66%

Effect of fluoride doping on impedance spectra of barium strontium titanate glass ceramics

Zhu

Zhang

et al. 2014

J Mater Sci: Mater Electron

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A system of barium strontium titanate glass ceramics with different fluoride concentrations were prepared by melt-annealing technique. The effect of fluoride doping on impedance spectra of the barium strontium titanate glass ceramics were investigated. According to the impedance spectroscopy studies, three (low, middle, and high frequency) electrical responses, which corresponds to glass phase, crystal-glass interface and crystal interior were identified. It is shown that with the increase of fluoride concentration, the resistivity of the glass phase passed through a minimum and then increased. In addition, the capacitance of the crystal-glass interface increased and the capacitance of the crystal phase decreased with the increase of the fluoride concentration. Moreover, as a result of ac conductivity calculation and analysis, it is believed that the dc conduction was affected by the glass and crystal-glass interface regions and ac regime was attributed to the crystal phase. Based on the results, a change of the compensation mechanism from electronic to ionic one with variation in fluoride concentration was proposed.

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Ac conductivity and dielectric relaxation in ionically conducting soda–lime–silicate glasses

Cited by 133 publications

References 19 publications

Relaxation and physical aging in network glasses: a review

Relaxation and physical aging in network glasses: a review

Influence of silver ion reduction on electrical modulus parameters of solid polymer electrolyte based on chitosan-silver triflate electrolyte membrane

Effect of fluoride doping on impedance spectra of barium strontium titanate glass ceramics

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