Quantitative studies on the microstructure of ternary CaO–Al2O3–SiO2 glasses by Raman spectroscopy, 27Al MAS NMR and quantum chemistry ab initio calculation

Tang, Xuelin; You, Jinglin; Wang, Jian; Zhang, Fu; Gong, Xiaoye; Xie, Yuling; Canizarès, A.; Bessada, Catherine; Fayon, Franck; Tang, Kai; Lü, Liming

doi:10.1016/j.ceramint.2023.07.150

Cited by 9 publications

(1 citation statement)

References 54 publications

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“…Raman spectroscopy is an extremely effective method for determining the structure, dynamics, and environment of a glassy network [45]. Raman spectroscopy is a vibrational inelastical spectroscopic technique resulting from interactions between the incident photons and molecular vibrations or other excitations.…”

Section: Raman Analysismentioning

confidence: 99%

Structural, optical, and shielding properties of lead borate glasses doped with copper oxide

Bawazeer

2024

Mater. Res. Express

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Lead borate glasses of the system 25PbO-(75-x) B2O3-xCuO (x = 0, 0.025, 0.05, and 0.1) in mol.% were synthesized via the traditional melt quenching method abbreviated as (BPbCu0, BPbCu1, BPbCu2, and BPbCu3) respectively. XRD diffraction confirmed the amorphous nature of the samples. According to FTIR spectroscopy, the function groups (BO3 and BO4) and the fraction of boron tetrahedral units (N4) were determined. The density, molar volume, packing density, and some other physical parameters were calculated and discussed. The density was increased by incorporating CuO as a substitution for B2O3, while the molar volume was decreased. The ion concentrations of Cu, inter-nuclear distance, field strength, and polaron radius were also computed. The optical absorption study suggested that the copper ions exist in the Cu2+ and act as a modifier by increasing the disorder in the glass network. Hence, the present glass behaves as a bandpass filter in the UV-Vis. region. The radiation shielding properties of the as-prepared samples were theoretically calculated using the Phy-X program at energies ranging from 0.015 to 1.5 MeV. The linear and mass attenuation coefficients, as well as the half-value layer (HVL) and exposure buildup factor (EBF), have been evaluated. The results revealed that shielding parameters are affected by CuO concentrations and photon energy. Based on the results presented in the manuscript, the glass sample with 0.1 mol% CuO doping (BPbCu3) showed the best properties overall for optical and radiation shielding applications. Specifically, BPbCu3 had the highest density, refractive index, optical dielectric constant, and radiation shielding parameters such as linear attenuation coefficient and half value layer among the glass samples. The addition of 0.1 mol% CuO introduced Cu2+ ions which acted as network modifiers, increasing the disorder in the glass structure. This in turn enhanced the optical bandgap as well as the shielding capabilities against gamma radiation.

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Section: Raman Analysismentioning

confidence: 99%

Structural, optical, and shielding properties of lead borate glasses doped with copper oxide

Bawazeer

2024

Mater. Res. Express

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Effect of CaO/SiO₂ and Al₂O₃/SiO₂ Mass Ratios on Structure and Viscosity of Mold Flux for Continuous Casting High‐Mn High‐Al Steel

Liu,

Wang,

Gao

et al. 2024

steel research int.

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During continuous casting process of high‐Mn high‐Al steel, soluble Al in the steel typically reacts with SiO2 in the mold flux, resulting in a decrease in SiO2 content and an increase in Al2O3 contents in the flux. The structure of slags with varying CaO/SiO2 and Al2O3/SiO2 mass ratio is investigated using Raman spectroscopy and nuclear magnetic resonance (NMR) spectroscopy. In the deconvolution results of Raman and NMR spectra, it is shown that the relative fractions of and significantly increase, while and gradually decrease with an increase in the CaO/SiO2 mass ratio from 0.52 to 1.02, resulting in depolymerization of the bridge oxygen structure. The silicon–oxygen tetrahedron transforms into aluminum–oxygen tetrahedron when the Al2O3/SiO2 mass ratio increased from 0.05 to 1.01. The viscosity of the slags with varying composition from 1573 to 1373 K is investigated. In the results, it is shown that with an increase in the CaO/SiO2 mass ratio, the viscosity decreases, and the complex SiO network structure is depolymerized. The viscosity decreases first as the Al2O3/SiO2 mass ratio increases from 0.05 to 0.24 and then increases as the mass ratio from 0.24 to 1.01, with the network formers transfer from SiO to SiAlO structures.

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Effect of B2O3 substitution for Al2O3 on the structure and properties of calcium aluminosilicate glass

Qin,

Wei,

Fan

et al. 2024

J Mater Sci: Mater Electron

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Quantitative studies on the microstructure of ternary CaO–Al2O3–SiO2 glasses by Raman spectroscopy, 27Al MAS NMR and quantum chemistry ab initio calculation

Cited by 9 publications

References 54 publications

Structural, optical, and shielding properties of lead borate glasses doped with copper oxide

Structural, optical, and shielding properties of lead borate glasses doped with copper oxide

Effect of CaO/SiO₂ and Al₂O₃/SiO₂ Mass Ratios on Structure and Viscosity of Mold Flux for Continuous Casting High‐Mn High‐Al Steel

Effect of B2O3 substitution for Al2O3 on the structure and properties of calcium aluminosilicate glass

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Quantitative studies on the microstructure of ternary CaO–Al2O3–SiO2 glasses by Raman spectroscopy, 27Al MAS NMR and quantum chemistry ab initio calculation

Cited by 9 publications

References 54 publications

Structural, optical, and shielding properties of lead borate glasses doped with copper oxide

Structural, optical, and shielding properties of lead borate glasses doped with copper oxide

Effect of CaO/SiO2 and Al2O3/SiO2 Mass Ratios on Structure and Viscosity of Mold Flux for Continuous Casting High‐Mn High‐Al Steel

Effect of B2O3 substitution for Al2O3 on the structure and properties of calcium aluminosilicate glass

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Effect of CaO/SiO₂ and Al₂O₃/SiO₂ Mass Ratios on Structure and Viscosity of Mold Flux for Continuous Casting High‐Mn High‐Al Steel