Electrical conduction and dielectric properties of vanadium phosphate glasses doped with lithium

Salman, Fathy; Shash, Nm; El-Haded, H. Abou; El‐Mansy, M. K.

doi:10.1016/s0022-3697(02)00164-6

Cited by 38 publications

(17 citation statements)

References 19 publications

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“…At low frequencies, M' approaches nearly zero at all temperature under study suggesting the suppression of the electrode polarization. At high frequencies, M' displaying a maximum value corresponding to due to relaxation process [37,38]. Fig.…”

Section: Electric Modulus Analysismentioning

confidence: 90%

AC conductivity and dielectric behavior in lithium and sodium diphosphate LiNa3P2O7

Zaafouri

Megdiche

Gargouri

2014

Journal of Alloys and Compounds

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Section: Electric Modulus Analysismentioning

confidence: 90%

AC conductivity and dielectric behavior in lithium and sodium diphosphate LiNa3P2O7

Zaafouri

Megdiche

Gargouri

2014

Journal of Alloys and Compounds

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“…In general, the spectrum increases slightly with increasing temperature which is usually associated with decreases in bond energies. In other words, the glassy network relaxes and weakens the intermolecular forces as temperature increases and hence the ions displacement i.e., orientation polarization becomes easier [25,26]. From the spectra, two relaxation processes can be observed.…”

Section: Dielectric Studiesmentioning

confidence: 99%

Effects of MgO on dielectric properties and electrical conductivity of ternary zinc magnesium phosphate glasses

Khor

Talib

Daud

et al. 2009

Journal of Non-Crystalline Solids

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a b s t r a c tGlasses with composition ðZnOÞ 30 ðMgOÞ x ðP 2 O 5 Þ 70Àx (x = 5, 8, 13, 18 and 20 mol%) have been successfully prepared by the melt-quenching technique. The dielectric permittivity (e 0 ) and loss factor (e 00 ) were measured in the frequency range of 0.01 Hz to 1 MHz and in the temperature range of 303 to 573 K. From the results, there is evidence of dipolar relaxation occurring between 10 3 -10 6 Hz, while at low frequencies, the spectrum is dominated by dc conduction which was manifested by the 1=x slope of the loss factor plot. The value of the relaxing frequency (x p ) plotted against 1=T shows a single relaxation mechanism with an activation energy of 0.45 eV. The average value of the activation energy for dc conduction was much higher (1.25 eV) suggesting its diffusion movement had encountered more difficult steps than the small displacement changing dipoles. With increasing MgO concentration, the dielectric permittivity (e 0 ), dc conductivity (r dc ) and dielectric strength (De) decrease and these were attributed to some of the magnesium ions participated in the glass-forming positions as well as modifiers. At lower temperatures, the complex permittivity plots present a skewed arc with center point lying below the real axis which is a non-Debye characteristic. The empirical data were sufficiently fitted by using the Harviliak-Negami equation. The temperature dependent of the parameter a is discussed.

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“…Therefore, glasses can be synthesized with a large amount of vanadium oxide (more than 50%). Silicate-vanadate glasses show interesting magnetic characteristics [2], and many studies have been carried out on the semiconducting and ionic conductivity properties of vanadophosphate glasses [3][4][5][6], or on their optical properties [7]. Even though the crystal structure of vanadophosphate compounds is well described [8], only few reports have been made on the structure of phosphate-vanadate glasses.…”

Section: Introductionmentioning

confidence: 99%

Redox and structure of sodium-vanadophosphate glasses

Tricot

Montagne

Delevoye

et al. 2004

Journal of Non-Crystalline Solids

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Electrical conduction and dielectric properties of vanadium phosphate glasses doped with lithium

Cited by 38 publications

References 19 publications

AC conductivity and dielectric behavior in lithium and sodium diphosphate LiNa3P2O7

AC conductivity and dielectric behavior in lithium and sodium diphosphate LiNa3P2O7

Effects of MgO on dielectric properties and electrical conductivity of ternary zinc magnesium phosphate glasses

Redox and structure of sodium-vanadophosphate glasses

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