Effect of alkali content on AC conductivity of borate glasses containing two transition metals

Kashif, I.; Rahman, Samia A. Abdel; Soliman, A.A.; Ibrahim, E.M.M.; Abdel-Khalek, E. K.; Mostafa, A.G.; Sanad, A. M.

doi:10.1016/j.physb.2009.07.102

Cited by 35 publications

(17 citation statements)

References 30 publications

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“…The impedance data analysis shows that a single semicircle arc is present in all the prepared compositions and there is no residual semicircle at lower frequency, which attributes to the single conduction mechanism [43,44]. The centre of each semicircle is observed to be depressed below R s axis which indicates that the associated relaxation of ions is non-Debye in nature [19,37]. From analysis, the semicircle arcs passing through the origin of impedance plots and the intercept at lower frequency on the R s axis give bulk resistance R b .…”

Section: Impedance Spectroscopymentioning

confidence: 83%

“…Our recent studies concern various properties of different vanadium doped borate glasses [16][17][18]. Kashif et al have studied the effect of alkali content on AC conductivity of borate glasses containing two transition metals [19]. Borate glasses are generally insulating in nature and the addition of transition metal oxides, such as Fe 2 O 3 and V 2 O 5 , makes them dilute magnetic in nature and electrically semiconducting.…”

Section: Introductionmentioning

confidence: 99%

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Structural, Physical, Electrical and Dielectric Properties of Magnetic Glasses: xFe₂O₃+(30-x)V₂O₅ + 30Na_2O + 40B₂O₃ with x=0 to 15

et al. 2019

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Magnetic glasses compositions: xFe2O3 + (30 − x)V2O5 + 30Na2O + 40B2O3 (x = 0, 2, 3, 5, 7, 10, and 15), abbreviated as FVNBx, are prepared with conventional melt-quenching technique, and the structural, physical, and electrical properties of compositions are investigated. The amorphous nature of the FVNBx glasses is confirmed using X-ray diffraction technique. It is found that the density of the glasses increases with x. The molar volumes calculations are based on the molar mass and the density data, which are then correlated with the structural changes. The decrease in the theoretical optical basicity shows marginal increase in the covalence of oxygen, when the V2O5 content is replaced with Fe2O3. The Fourier transform infrared spectroscopy that is carried out in the mid-IR region, shows the absence of the six-atomic (B3O3) boroxol rings. In this paper, the IR absorption bands corresponding to the combined contributions of tri and tetra borate vibrations are identified. The distinct IR spectra of the samples with different x indicates that the iron acts as a strong glass modifier, and brings only noticeable microstructural changes in the glass structures. Fe2O3 is believed to act as both glass former and glass modifier. The increase of DC electrical conductivity with temperature indicates a semiconducting nature of the glasses. The replacement of V2O5 by Fe2O3, even by 1 mol%, decreases the DC conductivity by an order of magnitude, and increases the activation energy by a factor of two. Composition, frequency, and temperature dependence of different dielectric parameters, namely dielectric constant ε , dielectric loss ε , loss tangent tan(δ), electrical modulus M * , etc., are also analyzed.

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Section: Impedance Spectroscopymentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Structural, Physical, Electrical and Dielectric Properties of Magnetic Glasses: xFe₂O₃+(30-x)V₂O₅ + 30Na_2O + 40B₂O₃ with x=0 to 15

et al. 2019

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“…This result indicates that the conduction of sodium or fluoride ions increased with increasing temperature. The dielectric constants of some food products increase with increasing sodium ion content . However, sodium ions do not contribute to conduction, and the charge carrier are only fluoride ions .…”

Section: Resultsmentioning

confidence: 99%

Determination of Fluoride Concentration in Antarctic Krill (Euphausia superba) using Dielectric Spectroscopy

Liu

Guo

et al. 2015

Bulletin Korean Chem Soc

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“…The glasses doped with two transition metal ions have great technological significance due to their enhanced electrical, linear and nonlinear optical properties as a result of hopping of an electron between the redox pairs. 10,14,23,24 During the process of synthesis of the glass samples, the following redox reactions may take place in the glass system 14,25 :…”

Section: Introductionmentioning

confidence: 99%

Dielectric dispersion, linear and nonlinear optical properties of Li₂O–WO₃–B₂O₃: V₂O₅ glasses

Rao¹,

Thirmal²,

Rao

2020

J. Adv. Dielect.

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40 Li2O–5 WO3–(55-[Formula: see text]) B2O3: [Formula: see text]V2O5 (mol%) for [Formula: see text] glasses were prepared by melt-quenching. Electric polarization was described in terms of the dielectric constant ([Formula: see text]) and loss ([Formula: see text]). Mixed conduction phenomenon was explained by redox pairs [Formula: see text] and [Formula: see text] at high temperatures. Electronic polarizability ([Formula: see text]) was determined over a range of frequencies (100[Formula: see text]Hz–100[Formula: see text]kHz) and temperatures (30–[Formula: see text]C). The change of boron coordination in the glass network was explained with the aid of temperature coefficient of polarizability ([Formula: see text]). Nonlinear susceptibility ([Formula: see text]) and optical band gap ([Formula: see text]) were studied as a function of concentration of V2O5. The highest values of [Formula: see text] and [Formula: see text] were obtained at [Formula: see text][Formula: see text]mol%. These glasses may find potential practical applications in the fields of solid-state ionics and nonlinear optics.

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Effect of alkali content on AC conductivity of borate glasses containing two transition metals

Cited by 35 publications

References 30 publications

Structural, Physical, Electrical and Dielectric Properties of Magnetic Glasses: xFe₂O₃+(30-x)V₂O₅ + 30Na_2O + 40B₂O₃ with x=0 to 15

Structural, Physical, Electrical and Dielectric Properties of Magnetic Glasses: xFe₂O₃+(30-x)V₂O₅ + 30Na_2O + 40B₂O₃ with x=0 to 15

Determination of Fluoride Concentration in Antarctic Krill (Euphausia superba) using Dielectric Spectroscopy

Dielectric dispersion, linear and nonlinear optical properties of Li₂O–WO₃–B₂O₃: V₂O₅ glasses

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Effect of alkali content on AC conductivity of borate glasses containing two transition metals

Cited by 35 publications

References 30 publications

Structural, Physical, Electrical and Dielectric Properties of Magnetic Glasses: xFe2O3+(30-x)V2O5 + 30Na2O + 40B2O3 with x=0 to 15

Structural, Physical, Electrical and Dielectric Properties of Magnetic Glasses: xFe2O3+(30-x)V2O5 + 30Na2O + 40B2O3 with x=0 to 15

Determination of Fluoride Concentration in Antarctic Krill (Euphausia superba) using Dielectric Spectroscopy

Dielectric dispersion, linear and nonlinear optical properties of Li2O–WO3–B2O3: V2O5 glasses

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Product

Resources

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Structural, Physical, Electrical and Dielectric Properties of Magnetic Glasses: xFe₂O₃+(30-x)V₂O₅ + 30Na_2O + 40B₂O₃ with x=0 to 15

Structural, Physical, Electrical and Dielectric Properties of Magnetic Glasses: xFe₂O₃+(30-x)V₂O₅ + 30Na_2O + 40B₂O₃ with x=0 to 15

Dielectric dispersion, linear and nonlinear optical properties of Li₂O–WO₃–B₂O₃: V₂O₅ glasses