Effects of temperature, and single and double dopings on the electromechanical properties of quaternary glasses

Gohar, I. A.; Sekkina, M. M. Abou; Megahed, A. A.

doi:10.1016/0040-6031(85)87016-7

Cited by 8 publications

(6 citation statements)

References 14 publications

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“…Addition of iron oxide to lead or alkali meta-phosphate glasses [3][4][5] improves the glass chemical durability as well as alkali oxide. Glasses prepared by normal cooling reveal the presence of crystallization at lower concentrations of Fe 2 O 3 [6][7][8][9][10] compared to glasses prepared under other conditions (e.g. twin roller quenching technique) where the amorphous nature of the glass matrix was found to be extended to higher concentrations of Fe 2 O 3 [11,12].…”

Section: Introductionmentioning

confidence: 99%

Characterization of iron oxychloride potassium phosphate glasses

Moustafa¹

1999

J. Phys. D: Appl. Phys.

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Glasses in the systems xFe2O3-(45-x)K2O-55P2O5 and yFeCl3-10Fe2O3-(35-y)K2O-55P2O5 have been prepared over a wide range of composition (x = 0-11.5 mol% and y = 0-30 mol%). The thermal expansion coefficient, glass transition temperature, density and dissolution rate in HCl (1.6 M) at 60 °C were investigated. Results indicate that increasing Fe2O3 content in potassium phosphate glasses increases the density and glass transition temperature, while the thermal expansion coefficient and dissolution rate decrease. The same behaviours were obtained when FeCl3 content was increased. These results indicate that the chemical durability of potassium phosphate glasses would be enhanced upon addition of Fe2O3 and/or FeCl3. The infra-red spectral analyses of the glasses reveal a significant structural change in the glass matrix depending on the composition. The incorporation of iron (as iron oxide or iron chloride) into the potassium phosphate matrix depolymerizes the glass structure through formation of P-O-Fe(III), P-O-Fe(II) and P-Cl bonds. The depolymerization process was found to be more sensitive for glasses with x+y<25 mol%.

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Section: Introductionmentioning

confidence: 99%

Characterization of iron oxychloride potassium phosphate glasses

Moustafa¹

1999

J. Phys. D: Appl. Phys.

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“…The work of network former as a secondary form or one can say a network modifier is played by ZnO to ensure its usage of the diverse fields. In a glassy system, the network former acts as a bulk, and the properties of the system is being altered by the network modifier [28] . In the present study, a zinc‐vanadate glassy system that contains Fe altered by CdO is studied in a broad constitutional domain and the prepared glasses are characterized by various techniques i. e. differential scanning calorimetric (DSC), X‐ray diffraction (XRD), field emission‐scanning electron microscopy (FE‐SEM), and energy dispersive X‐ray (EDX) analysis.…”

Section: Introductionmentioning

confidence: 99%

“…[24] This study reported that DC activation energies and hopping frequencies vary from 0.57-0.46 and 0.60-0.25. Despite the reality that a few studies have already been performed to examine these kinds of systems, [25][26][27][28] but are still a lot of work to be done to acquire sufficient information on crystallization behavior and electrical conductivity mechanism within these glassy materials. Moreover, it would be more attractive to find the effect of iron in the form of an element when doped in the V 2 O 5 -MoO 3 -CdO-ZnO glassy system in place of its oxide form.…”

Section: Introductionmentioning

confidence: 99%

Influence of Fe on Crystallization Behaviour and Electrical Conductivity of V₂O₅ ⋅ MoO₃ ⋅ CdO ⋅ ZnO Glass Nanocomposite

et al. 2023

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The effect of varying iron content on the crystallization behavior and electrical conductivity mechanism of glass nanocomposite based on the system xFe ⋅ (1‐x) ⋅ (0.3 V2O5 ⋅ 0.2MoO3 ⋅ 0.4CdO ⋅ 0.1ZnO) (x=0.0, 0.05 and 0.1) was investigated by differential scanning calorimetry (DSC), Fourier transforms infrared (FTIR), X‐ray diffraction (XRD), and field emission‐scanning electron microscopy (FESEM). Different crystal phases and the average size of the developed nanocrystallites in the as‐prepared samples have been obtained from the XRD diffraction data. The size of estimated nanocrystallites increases up to Fe (x) content 0.05, after which the size of nanocrystallites decreases as the Fe content in the compositions increases. FESEM micrographs confirm the formation of plate‐like and dendrite nano crystallites throughout the glass matrix. Energy‐dispersive X‐ray spectroscopy (EDX) mapping analysis shows the weight percentage of each constituent element. The dc activation energy (Eσ), as well as activation energy (EH) for hopping frequency of as‐prepared samples, gradually decreases with increasing Fe content whereas AC and DC conductivity gradually increased.

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“…No hardness values of LBO have come to our attention. There are, however, scarce data obtained with borate glasses of other compositions [42][43][44]. The crack velocities during dynamic fracture of silicon glass and single crystal were compared by [45].…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of single crystalline and glassy lithium triborate

Shakhverdova¹,

Paufler

Бубнова

et al. 2008

Cryst. Res. Technol.

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Mechanical properties of LiB 3 O 5 single crystal plates with different orientation as well as of glass with the same composition have been investigated. The nano-(H) and microhardness (H M ), the reduced Young's modulus (E r ) and the crack behaviour of the samples were studied. Both hardness and Young's modulus of glass appeared smaller in comparison to corresponding single crystal data (H ~ 7 -8 GPa, H M~ 6 GPa, E r ~ 70 -80 GPa for glass and H ~10 -15 GPa, H M~6 -11 GPa, E r~ 93 -155 GPa for single crystal). H, E r , and the plane of crack propagation proved orientation-dependent. Cracks in the glass sample were not observed up to 0.49 N microindentation load, whereas for the single crystal the cracks appeared already at 0.098N. In single crystals the observed cleavage planes {211} and/or {412} are oriented nearly parallel to planes of B-O rings.

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Effects of temperature, and single and double dopings on the electromechanical properties of quaternary glasses

Cited by 8 publications

References 14 publications

Characterization of iron oxychloride potassium phosphate glasses

Characterization of iron oxychloride potassium phosphate glasses

Influence of Fe on Crystallization Behaviour and Electrical Conductivity of V₂O₅ ⋅ MoO₃ ⋅ CdO ⋅ ZnO Glass Nanocomposite

Mechanical properties of single crystalline and glassy lithium triborate

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Effects of temperature, and single and double dopings on the electromechanical properties of quaternary glasses

Cited by 8 publications

References 14 publications

Characterization of iron oxychloride potassium phosphate glasses

Characterization of iron oxychloride potassium phosphate glasses

Influence of Fe on Crystallization Behaviour and Electrical Conductivity of V2O5 ⋅ MoO3 ⋅ CdO ⋅ ZnO Glass Nanocomposite

Mechanical properties of single crystalline and glassy lithium triborate

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Influence of Fe on Crystallization Behaviour and Electrical Conductivity of V₂O₅ ⋅ MoO₃ ⋅ CdO ⋅ ZnO Glass Nanocomposite