Optical properties of Lead bismuth borate glasses doped with neodymium oxide

Farouk, M.; El-Maboud, A. Abd; Elhaes, Hanan; Ratep, A.; Kashif, I.

doi:10.1016/j.saa.2015.04.070

Cited by 39 publications

(11 citation statements)

References 35 publications

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“…According to extensive studies using several techniques, such as Fourier transform infrared spectroscopy (FTIR) [9], ultraviolet-visible spectroscopy [10], X-ray diffraction [11], B 11 and Pb 207 nuclear magnetic resonance spectroscopy [11][12][13] and Raman spectroscopy [14,15], the structural and physical properties of these glasses revealed a wide composition range of 20-80 mol% PbO [16]. According to its concentration, PbO can enter the network of sodium borate glass as a network modifier or as a network former [17,18].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic and structural features of some borosilicate glasses modified with heavy metals

Saddeek

2017

Bull Mater Sci

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A quaternary glass system Na 1.4 B 2.8 Si x Pb 0.3−x O 5.2+x , with 0 ≤ x ≤ 0.3, was prepared and studied by Fourier transform infrared spectroscopy, density and ultrasonic techniques to debate the issue of the role of SiO 2 in the structure of lead alkali borate glasses. The results indicate that SiO 2 generates an abundance of bridging oxygen atoms, [BO 4 ] and [SiO 4 ] structural units and changes the bonds B-O-B and Pb-O-B to Si-O-Si and B-O-Si. The latter bonds have higher bond strength and higher average force constant than the former bonds. Therefore, the glass structure becomes contracted and compacted, which decreases its molar volume and increases its rigidity. This concept was asserted from the increase in the ultrasonic velocity, Debye temperature and elastic moduli with the increase of SiO 2 content. The present compositional dependence of the elastic moduli was interpreted in terms of the electron-phonon anharmonic interactions and the polarization of Si 4+ cation. A good correlation was observed between the experimentally determined elastic moduli and those computed according to the Makishima-Mackenzie model.

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Section: Introductionmentioning

confidence: 99%

Ultrasonic and structural features of some borosilicate glasses modified with heavy metals

Saddeek

2017

Bull Mater Sci

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“…The absorption coefficient (α) can be calculated by the relation [42]: By calculating the absorption coefficient, the optical band gap can be calculated using Mott-Davis relation [43]:…”

Section: Optical Band Gap (Direct and Indirect) And Urbach Energymentioning

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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“…Borate oxide glasses are one of the most suitable for doping with RE 3+ ions among the potential host glasses. [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Structural role of Nd2O3 as a dopant material in modified borate glasses and glass ceramics

Shaalan

El-Damrawi

Hassan

et al. 2021

J Mater Sci: Mater Electron

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Glasses in the system xNd 2 O 3 -(46-x)B 2 O 3 -27CaO-24.4Na 2 O-2.6 P 2 O 5 (0 ≤ x ≤ 4 mol%) have been prepared via conventional melt quenching technique. X-ray diffraction (XRD) spectra have showed that the amorphous structure is dominant in glasses of Nd 2 O 3 concentrations ≤ 0.5 mol%. But formation of a more ordered structure is con rmed at higher Nd 2 O 3 values. Result based on differential scanning calorimetry (DSC) shows an increase in glass transition temperature (T g ) with increasing Nd 2 O 3 at expense of B 2 O 3 contents. Vicker hardness (H v ) and density (D) are used to correlate the glass structure with its properties. The measured density is found to be increased whereas the molar volume is decreased with increasing Nd 2 O 3 content. The calculated molar volume (V m ) and free spaces (V f ) are both decreased due to lling process which is suggested to be carried out by Nd 3+ of larger size than that of B 3+ . Decreasing of V m and V f can re ect the increase in bridging bonds in the glass network which in turns results in increasing of both T g and of the investigated compositions.

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Optical properties of Lead bismuth borate glasses doped with neodymium oxide

Cited by 39 publications

References 35 publications

Ultrasonic and structural features of some borosilicate glasses modified with heavy metals

Ultrasonic and structural features of some borosilicate glasses modified with heavy metals

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

Structural role of Nd2O3 as a dopant material in modified borate glasses and glass ceramics

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