Structural and electric-dielectric properties of some bismuth -phosphate glasses

Shapaan, M.; Elbadry, Seham; Mostafa, A.G.; Hassaan, M. Y.; Hazzaa, M.H.

doi:10.1016/j.jpcs.2011.11.007

Cited by 23 publications

(6 citation statements)

References 36 publications

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“…This figure reveals that AC conductivity is positively affected by the increasing of temperature as it records a significant increase in its values at all frequencies. Notably, this effect is known as thermal activation [49,50]. It is important to highlight that an increase in temperature leads to the occurrence of noticeable dispersion at a specific frequency which becomes prominent and shifts to a higher frequency region which is analysed by using Jonscher's universal power law [40] where σ dc is the DC conductivity in the specific temperature range and frequency, A is the temperature-dependent parameter and s is the frequency exponent.…”

Section: Electrical Propertiesmentioning

confidence: 99%

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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Section: Electrical Propertiesmentioning

confidence: 99%

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

et al. 2019

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“…Other (PO 4 ) 3 groups are cross-linked to these chains by sharing three corners by oxygen polyhedra containing the modifier ions [27]. The interpretation of the IR spectra of the samples under investigation can be summarized as the following [24][25][26][28][29][30][31][32][33][34][35][36][37].…”

Section: Ftir Resultsmentioning

confidence: 99%

Enhancement of structural and optical properties of transparent sodium zinc phosphate glass–ceramics nano composite

et al. 2022

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Transparent sodium phosphate glass–ceramics system according to the composition (55-x) P2O5.(30 + x)ZnO.15Na2O where x = 0, 2.5, 5, 7.5, and 10 was prepared with the melt quenching technique. Different techniques such as XRD and infrared spectroscopy (FTIR) were used to investigate the structure of the studied glass samples and glass–ceramics nano composite. XRD revealed the formation of crystalline phase. The crystalline phase of Na2Zn (P2O7) and Na2ZnP2O7.Zn2P2O7 has been detected which varies according to the ZnO concentration. The density increased whereas molar volume decreased as ZnO content was increased. Optical band gap values, direct and indirect, decreased with increasing ZnO content revealing that bridging oxygen linkage Zn–O-P present in the glass network. The band gaps were found to be ranging between 3.42 and 3.13 eV for indirect transition and ranging between 4.34 and 4.20 eV for direct transitions. It was concluded that the samples have a strong tendency to be crystallized with increasing ZnO content in the sample. This crystallization behavior with increasing the ZnO content affected the structure and optical properties of the prepared samples. In this work, a low cost, wide band gap transparent ceramic with wide range of transparency was prepared and investigated. Such glass–ceramic system is suitable for doping with rare-earth element and/or transition metals for laser and optical devices.

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“…The band at 1082 cm –1 resulted from the asymmetric stretching vibration mode of the P–O–P non‐bridging bond oxygen group The band at 1163 cm –1 was related to (P–O − ) vibrations in the orthophosphate groups The band at 1638 cm –1 was due to the presence of the P–O–H group …”

Section: Resultsmentioning

confidence: 99%

Structural and luminescence properties of Sm³⁺‐doped bismuth phosphate glass for orange‐red photonic applications

2018

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In the present study, the effect of bismuth oxide (Bi O ) content on the structural and optical properties of 0.5Sm -doped phosphate glass and the effect of concentration on structural and optical properties of Sm -doped bismuth phosphate (BiP) glass were studied. Structural characterization was accomplished using X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), Fourier transform infrared (FTIR) spectroscopy and P nuclear magnetic resonance (NMR) spectroscopy. Optical properties were studied using absorption, photoluminescence and decay measurements. Using optical absorption spectra, Judd-Ofelt parameters were derived to determine the local structure and bonding in the vicinity of Sm ions. The emission spectra of Sm -doped BiP glass showed two intense emission bands, G → H (orange) and G → H (red) for which the stimulated emission cross-sections (σ ) and branching ratios (β) were found to be higher. The quantum efficiencies were also calculated from decay measurements recorded for the G level of Sm ions. The suitable combination of Bi O (10 mol%) and Sm (0.5 mol%) ions in these glasses acted as an efficient lasing material and might be suitable for the development of visible orange-red photonic materials.

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Structural and electric-dielectric properties of some bismuth -phosphate glasses

Cited by 23 publications

References 36 publications

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

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

Enhancement of structural and optical properties of transparent sodium zinc phosphate glass–ceramics nano composite

Structural and luminescence properties of Sm³⁺‐doped bismuth phosphate glass for orange‐red photonic applications

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Structural and electric-dielectric properties of some bismuth -phosphate glasses

Cited by 23 publications

References 36 publications

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

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

Enhancement of structural and optical properties of transparent sodium zinc phosphate glass–ceramics nano composite

Structural and luminescence properties of Sm3+‐doped bismuth phosphate glass for orange‐red photonic applications

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Structural and luminescence properties of Sm³⁺‐doped bismuth phosphate glass for orange‐red photonic applications