Effect of Li2O on the structure, electrical and dielectric properties of xLi2O·(20−x)CaO·30P2O5·30V2O5·20Fe2O3 glasses

Morsi, Reham M.M.; Ibrahiem, S.

doi:10.1016/j.physb.2011.04.043

Cited by 17 publications

(6 citation statements)

References 57 publications

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“…The broad features at 1275 cm -1 band is asymmetric stretching due to P=O bonds [15]. The three bands nearly at 1613 cm -1 , 2900 cm -1 and 3428 cm -1 are attributed to bending vibrations of O-H, stretching vibrations of O-H and hydroxyl groups respectively [16].…”

Section: Fourier Transform Infra Red Spectra (Ftir)mentioning

confidence: 96%

Spectroscopic and laser properties of Er3+ doped fluoro-phosphate glasses as promising candidates for broadband optical fiber lasers and amplifiers

Babu

Seshadri

Prasad

et al. 2015

Materials Research Bulletin

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Section: Fourier Transform Infra Red Spectra (Ftir)mentioning

confidence: 96%

Spectroscopic and laser properties of Er3+ doped fluoro-phosphate glasses as promising candidates for broadband optical fiber lasers and amplifiers

Babu

Seshadri

Prasad

et al. 2015

Materials Research Bulletin

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“…When the fairly weight cation is introduced to glass structure, depending on its role (being glass former or modifier), it has distinctive effects on infrared spectrum. 47 As a whole, similarity of two series is clear, except for the range of 890-1100 cm −1 at 1650270-8 obtained spectra are more similar and the only clear difference is observed in 920 cm . In fact, decreasing of Mo ions concentration leads to decrement of Mo-O stretching vibrational peak intensity.…”

Section: Experimental Section Of Uv-vis and Ft-ir Spectroscopymentioning

confidence: 59%

“…When the fairly weight cation is introduced to glass structure, depending on its role (being glass former or modifier), it has distinctive effects on infrared spectrum. 47 As a whole, similarity of two series is clear, except for the range of 890-1100 cm -1 at which can be ascribed to presence of second TMO in 1 th series. The obtained spectra have relatively wide bands.…”

Section: Experimental Section Of Uv-vis and Ft-ir Spectroscopymentioning

confidence: 67%

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Optical and structural characterization of quadruplet and quintuplet molybdenum-containing phosphate glasses

2016

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In this work, vitreous samples were prepared in two series by normal melt-quenching technique and under controlled conditions. The amorphous nature of specimens was confirmed using XRD spectra. To perform FT-IR and UV-vis studies, the thin blown films were also prepared. Different ratios of transition metals are assumed to cause depolymerization of the phosphate glass network. Infrared spectra showed absorption bands related to characteristic bonds of phosphate. The P O bond at about 1200 cm −1 was observed, as a direct consequence of meta-phosphate bond group. The almost unchanged peak position and intensity of P O bond (in the presence of two transition metal ions) indicated the glass modifying nature of transition metal oxides (TMOs). The spectra of two series are almost identical, except for 890-1100 cm −1 range, which can be attributed to presence of second TMO in the first glass series. UV-vis spectra also showed that the absorption edge, optical band gap and Urbach energy of the prepared samples are highly dependent on the kind and percentage of their reagents. The most striking result of UV-vis measurements was increasing and decreasing of optical band gap in the first and the second series with MoO 3 content, respectively. The shape of the absorption edge (a plot of (αhυ) 1/2 versus hυ) demonstrated the indirect nature of the band gap in the prepared specimens.

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“…From this figure it can be seen that: (1) the ac conductivity gradually increases with frequency. A frequency-independent plateau region is appearing in the conductivity pattern which corresponds to dc conductivity [26], (2) the ac conductivity values increase with increasing temperature or WO 3 content. The ac conductivity r ac of the studied samples has been calculated and log r dc versus 10 3 /T K -1 is plotted for the glass samples (Fig.…”

Section: Infrared Absorption Spectramentioning

confidence: 99%

Dielectric, electrical and spectroscopic properties of barium borates of low WO3 content

Morsi

Abdelghany

Morsi

2015

J Mater Sci: Mater Electron

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Infrared and optical absorption UV-Vis measurements, electrical and dielectric properties were carried out for glasses with the composition (mol%) 60B 2 O 3 Á 40BaO containing 0.0, 3, 5 and 9 g WO 3 /100 g glass. Infrared absorption spectra of all glasses indicate the presence of both triangular BO 3 units and tetrahedral BO 4 units, and the latter is overlapped with stretching vibrations of WO 4 and WO 6 units. UV-Vis measurements reveal strong charge transfer cutoff and no absorption bands were recorded in the visible region. Upon increasing WO 3 content in the studied glasses the optical band gap (E opt ) and the electrical conductivity values increase whereas activation energy values decrease. The increase in the electrical conduction was attributed to the hopping mechanism between the two sites of tungsten (W 5? , W 6? ). In the low frequency region below 1 kHz the dielectric constant measured at 200 Hz and room temperature was increased from 27 to 177 on increasing WO 3 content from 0.0 to 9.0 g WO 3 per 100 g glass, respectively. At 300°C the dielectric constant reached a value of 435 for sample containing 9.0 g WO 3 per 100 g glass. The present results may make it as a promising candidate for energy storage in electronic applications.

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Effect of Li2O on the structure, electrical and dielectric properties of xLi2O·(20−x)CaO·30P2O5·30V2O5·20Fe2O3 glasses

Cited by 17 publications

References 57 publications

Spectroscopic and laser properties of Er3+ doped fluoro-phosphate glasses as promising candidates for broadband optical fiber lasers and amplifiers

Spectroscopic and laser properties of Er3+ doped fluoro-phosphate glasses as promising candidates for broadband optical fiber lasers and amplifiers

Optical and structural characterization of quadruplet and quintuplet molybdenum-containing phosphate glasses

Dielectric, electrical and spectroscopic properties of barium borates of low WO3 content

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