Electrical and Dielectric Behavior of Zinc Phosphate Glasses

Choudhary, Bhasker Pratap

doi:10.1016/j.matpr.2017.06.034

Cited by 9 publications

(3 citation statements)

References 12 publications

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“…The effect of space charge was disappeared at higher frequencies, since the conductivity is increased with a higher rate than that detected in lower frequency region. It can also be shown from Actually, several models [24] [25] [26] have been proposed claiming that some glass systems contain small clusters or micro domains. These clusters are formed during the cooling process and are surrounded by a residual phase or connective tissue.…”

Section: Ac Measurementsmentioning

confidence: 99%

“…In the second region, the conductivity increases with higher rate with increasing frequency (jump relaxation)[15]-[23].Finally, at certain value of frequency (log f = 6.5), the conductivity tends to be fixed around a specific maximum single value for all composition (higher frequency limit). Comparing the experimental data of conductivity of sodium rich glass with the dispersion of the conductivity according to the jump relaxation model reflects a good resemblance[23] [24] [25][26].…”

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confidence: 98%

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Dielectric Studies on CuO-Na2O-B2O3 Glasses

Atef¹,

El-Damrawi²,

Hassan³

et al. 2020

NJGC

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This work is aimed to shed light on the dielectric behavior of CuO containing glasses, since no publications concerning this issue have been presented before. Different glasses in the binary Na 2 O-B 2 O 3 system were prepared by melt annealing technique. XRD spectra have shown that the amorphous structure is dominant in all glasses containing mixed concentrations from CuO and Na 2 O. The crystalline phases appeared only in glass free from Na 2 O. The dielectric spectroscopy is applied to shed some light on the conduction mechanisms in terms of changing both the dielectric constant and the electrical modulus of the investigated glasses. The ac conductivity increases with increasing frequency and decreases with increasing CuO concentration. Both the dielectric constant and dissipation loss is decreased with increasing frequency. Correlated barrier hopping (CBH) is considered an appropriate conduction mechanism results from the increase of frequency.

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Section: Ac Measurementsmentioning

confidence: 99%

mentioning

confidence: 98%

Dielectric Studies on CuO-Na2O-B2O3 Glasses

Atef¹,

El-Damrawi²,

Hassan³

et al. 2020

NJGC

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“…The great compositional flexibility of phosphate glasses (PG) along with properties such as low melting and transition temperatures, high thermal expansions coefficients, and ultraviolet transmission, and electrical conductivity, makes this family of glasses excellent candidates for the study of a variety of applications [1][2][3][4][5][6][7]. Modification of PG expands their applicability as their properties are altered.…”

Section: Introductionmentioning

confidence: 99%

Electrical Transport in Iron Phosphate-Based Glass-(Ceramics): Insights into the Role of B2O3 and HfO2 from Model-Free Scaling Procedures

et al. 2022

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In this work, we report the effect of the addition of modifiers and network formers on the polaronic transport in iron phosphate glasses (IPG) in two systems of HfO2–B2O3–Fe2O3–P2O5, to which up to 8 mol% boron and hafnium are added. The addition of oxides significantly changes the Fe2+/Fetotal ratio, thus directly affecting the polaron number density and consequently controlling DC conductivity trends for both series studied by impedance spectroscopy. Moreover, we found that short-range polaron dynamics are also under the influence of structural changes. Therefore, we have studied them in detail using model-free scaling procedures, Summerfield and Sidebottom scaling. An attempt to construct a super-master curve revealed that in addition to change in polaron number density, also the polaron hopping lengths change, and Sidebottom scaling yields a super-master curve. The spatial extent of the localized motion of polarons is correlated with polaron number density and two distinct regions are observed. A strong increase in the spatial extent of the polaron hopping jump could be related either to the structural changes due to the addition of HfO2 and B2O3 and their effects on the formation of polarons or to an inherent property of polaron transport in IP glasses with low polaron number density.

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Thermal, mechanical and electrical properties of lithium phosphate glasses doped with copper oxide

et al. 2019

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Lithium phosphate glasses with the basic composition (P 2 O 5 50 and Li 2 O 50 mol%) series by the addition of copper oxide (0, 10, 15 and 20 g/100 g) were prepared by a melt quenching technique. Fourier-transform infrared (FTIR) absorption spectra and X-ray diffraction (XRD) analysis were used to characterize the glass samples. Thermal expansion and mass density were also measured. The different mechanical properties of the prepared glasses were measured by an ultrasonic non-destructive technique. Additionally, both frequency and temperature dependence of alternating-current conductivity were measured in the frequency range of 40 Hz-1 MHz and the temperature range of 308-488 K. Moreover, direct current conductivity was also measured for the same temperature range. FTIR measurements confirm the appearance of the bands of phosphate groups and the assumption of bonds formed between Cu and P. XRD spectra approve the amorphous nature of the studied glasses. Thermal expansion and mass density of the prepared samples show an increase in values by increasing the CuO content. The mechanical properties of the studied glasses (hardness (H v), Young's modulus (E), elastic modulus (L), bulk modulus (K), shear modulus (G) and Poisson's ratio (ν)) were positively affected by the CuO content, reflecting a better packed structure. Furthermore, the electrical conductivity values of the prepared glasses are identified to increase with an increase in both temperature and CuO content. Such trends agree with the data obtained by thermal expansion and FTIR. The progressive addition of CuO is assumed to improve thermal, mechanical and electrical properties of the prepared lithium phosphate glasses.

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Electrical and Dielectric Behavior of Zinc Phosphate Glasses

Cited by 9 publications

References 12 publications

Dielectric Studies on CuO-Na<sub>2</sub>O-B<sub>2</sub>O<sub>3</sub> Glasses

Dielectric Studies on CuO-Na<sub>2</sub>O-B<sub>2</sub>O<sub>3</sub> Glasses

Electrical Transport in Iron Phosphate-Based Glass-(Ceramics): Insights into the Role of B2O3 and HfO2 from Model-Free Scaling Procedures

Thermal, mechanical and electrical properties of lithium phosphate glasses doped with copper oxide

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Electrical and Dielectric Behavior of Zinc Phosphate Glasses

Cited by 9 publications

References 12 publications

Dielectric Studies on CuO-Na&lt;sub&gt;2&lt;/sub&gt;O-B&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; Glasses

Dielectric Studies on CuO-Na&lt;sub&gt;2&lt;/sub&gt;O-B&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; Glasses

Electrical Transport in Iron Phosphate-Based Glass-(Ceramics): Insights into the Role of B2O3 and HfO2 from Model-Free Scaling Procedures

Thermal, mechanical and electrical properties of lithium phosphate glasses doped with copper oxide

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Dielectric Studies on CuO-Na<sub>2</sub>O-B<sub>2</sub>O<sub>3</sub> Glasses

Dielectric Studies on CuO-Na<sub>2</sub>O-B<sub>2</sub>O<sub>3</sub> Glasses