Structural, optical, thermal and conducting properties of V2−xLixO5−δ (0.15 ≤ x ≤ 0.30) systems

Khan, Savidh; Singh, K.

doi:10.1038/s41598-020-57836-8

Cited by 23 publications

(8 citation statements)

References 44 publications

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“…It is wellreported that in the quenching process, solid-state shrinkage occurs when the crystalline phases are formed. 25 Further, the ionic concentration (N) and interionic distance (R) have also been calculated using the following relations 10 and are given in Table 1: N V (6.022 10 mol %ofcation valency)…”

Section: Resultsmentioning

confidence: 99%

Unconventional Behavior of Na₂O in MgO-V₂O₅ Glasses in Comparison to Silicate Glasses

et al. 2023

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The composition of 75V 2 O 5 -(25 − x)MgO-(x)Na 2 O with x = 0, 1.5, 3.0, 4.5, 6.0, 9.0, and 12 is synthesized by the melt quench technique. The prepared samples were characterized by the X-ray diffraction (XRD) method. XRD pattern of 75V 2 O 5 -25MgO confirmed the glass formation. The addition of Na 2 O converted glass into a glass ceramic/ceramics. The density shows no trend with the Na 2 O content in the glass compositions. Differential thermal analysis confirmed the glassy nature of the x = 0 sample. For all samples, the conductivity variation as a function of the temperature follows an Arrhenius relationship. The highest conductivity is found for the x = 12 sample, i.e., 10 −2 S/cm at 250 °C with better thermal stability. The developed samples can find applications as cathode materials in Mg-or Nabased batteries due to good conductivity with better thermal and structural stability.

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Section: Resultsmentioning

confidence: 99%

Unconventional Behavior of Na₂O in MgO-V₂O₅ Glasses in Comparison to Silicate Glasses

et al. 2023

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“…The presence of TM ions regulates electrical conduction in glasses by controlling their structure, movement of TM ions and also by polaron hopping among TM ions in different oxidation states [12]. According to the conductivity models reported earlier [6], the charge carrier along with its self-induced polarization cloud, i.e., polaron, transfers among ions in the glass matrix [13]. This polaron hopping is influenced by the oxidation states of the TM ions and determines the conductivity of the glasses and glass-ceramics.…”

Section: Introductionmentioning

confidence: 93%

“…5) were used to determine the activation energies for conduction in these samples. Temperaturedependent conductivity follows Arrhenius equation as follows [6,39,41]:…”

Section: Ac Conductivitymentioning

confidence: 99%

“…Glasses and glass-ceramics have become essential materials in our daily life due to their wide-ranging applications, compositional flexibility, and tailorable properties [1][2][3][4]. Among variety of glasses and glass-ceramics, those containing oxides of transition metals (TM) have been potential area of research due to their bioactivity, semiconducting properties, and electronic conduction that can indeed arise through the electronic transfer between different valence states of the TM cations [5,6]. In TM ions containing glass-ceramics, conduction takes place by the transfer of the electrons from low to high valence state.…”

Section: Introductionmentioning

confidence: 99%

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Effect of transition metals (MO-TiO2, MnO2, Fe2O3, and ZnO) on crystallization and electrical conductivity of SiO2–CaO–Na2O–P2O5-based glass-ceramics

Danewalia

Khan

Dhillon

et al. 2020

Ionics

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Various glasses are synthesized by melt quench technique. The addition of transition metal (TM) oxides into glasses paves the light on their crystallization and sinterability. The formation of different crystalline phases and their microstructures significantly influenced the conduction mechanism in these glass-ceramics. ZnO seemed to act as glass modifier, while TiO 2 appears to act as glass former in the present glasses. Other two TM oxides might have played a role as intermediate oxides. The present glassceramics are mixed conductors (ionic+electronic). MnO 2 -contained sample shows highest electrical conductivity while Fe 2 O 3contained sample show lowest conductivity. The observed results are interpreted on the basis of structural differences of the samples.

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“…On each of the produced glasses, X-ray diffraction analyses were carried, using Malvern Panalytical X-ray diffractometer X'PERT 3 powder instrument operated at 40 kV and current of 30 mA with Cu-Kα wavelength at room temperature and 2θ ranging from 10˚ to 80˚.…”

Section: Xrdmentioning

confidence: 99%

Studies of Anomalies in Mixed Conduction of Na2O and V2O5 Doped Boro-Phosphate Glasses

Jakhati¹,

Nadavalumane²,

Ashwajeet³

2022

NJGC

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A set of borophosphate glasses doped with alkali and transition metal (TM) ions have been synthesized. The glasses were carried through; annealing, XRD, density, DC conductivity studies. Molar volume and density varied nonlinearly. High temperature activation energy is analysed taking into consideration of Mott's SPH model. The low temperature electrical conductivity was analysed by Mott and Greaves VRH. Several polaron hopping related parameters at high temperature region and density of states at low temperature region were computed. The high temperature DC activation energy measured by conductivity, calculated numerous pertained parameters varied nonlinearly with mole fraction of vanadium content. The Study exhibits DC electrical conduction is due to both alkali and transition metal ions and thus confirms the mixed conductivity. A crossover conduction mechanism from the ionic dominant region to polaronic predominant region has been also observed.Studies revealed the single transition effect at 0.4 mol fraction of V 2 O 5 content.

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Structural, optical, thermal and conducting properties of V2−xLixO5−δ (0.15 ≤ x ≤ 0.30) systems

Cited by 23 publications

References 44 publications

Unconventional Behavior of Na₂O in MgO-V₂O₅ Glasses in Comparison to Silicate Glasses

Unconventional Behavior of Na₂O in MgO-V₂O₅ Glasses in Comparison to Silicate Glasses

Effect of transition metals (MO-TiO2, MnO2, Fe2O3, and ZnO) on crystallization and electrical conductivity of SiO2–CaO–Na2O–P2O5-based glass-ceramics

Studies of Anomalies in Mixed Conduction of Na<sub>2</sub>O and V<sub>2</sub>O<sub>5</sub> Doped Boro-Phosphate Glasses

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Structural, optical, thermal and conducting properties of V2−xLixO5−δ (0.15 ≤ x ≤ 0.30) systems

Cited by 23 publications

References 44 publications

Unconventional Behavior of Na2O in MgO-V2O5 Glasses in Comparison to Silicate Glasses

Unconventional Behavior of Na2O in MgO-V2O5 Glasses in Comparison to Silicate Glasses

Effect of transition metals (MO-TiO2, MnO2, Fe2O3, and ZnO) on crystallization and electrical conductivity of SiO2–CaO–Na2O–P2O5-based glass-ceramics

Studies of Anomalies in Mixed Conduction of Na&lt;sub&gt;2&lt;/sub&gt;O and V&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;5&lt;/sub&gt; Doped Boro-Phosphate Glasses

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Unconventional Behavior of Na₂O in MgO-V₂O₅ Glasses in Comparison to Silicate Glasses

Unconventional Behavior of Na₂O in MgO-V₂O₅ Glasses in Comparison to Silicate Glasses

Studies of Anomalies in Mixed Conduction of Na<sub>2</sub>O and V<sub>2</sub>O<sub>5</sub> Doped Boro-Phosphate Glasses