Spectroscopic studies on Li2O–MgO–Bi2O3–B2O3 glasses

Purnima, M.; Stalin, Salavadi; Edukondalu, Avula; Samee, M.A.; Ahmmad, Shaik Kareem; Rahman, Syed

doi:10.1016/j.cjph.2020.05.031

Cited by 34 publications

(6 citation statements)

References 43 publications

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“…The band range 1297 cm −1 to 1319 cm −1 is due to the stretching-vibrations of B-O bonds of pyroborate groups; vibrations are due to BO 2 -O triangularly-linked with B-O units [32,33]. The Raman bands in the range 1495 to 1870 cm −1 is attributed to BO stretching-vibrations in BO 3 triangular units due to various borate groups [33,34].…”

Section: N4mentioning

confidence: 97%

“…The ionic packing-ratio (V p ) and density ( ) relation and is conveyed as [15]: [33] 1297-1319 cm −1 Stretching vibrations of B-O bonds of pyroborate groups; vibrations due to BO 2 -O-triangles linked with BO units [32,33] 1495-1870 cm −1 BO stretching vibrations in BO 3 triangular units [33,34] M i = mole weight in gram per mole, x i = mole portion in mole percent, ρ = glass Exp. Density (gram /cc), and V i = density parameter volume in meter 3 /mol evaluated by [35]: N A = Avogadro's number, r M , r O are respective metallic and ionic radius of oxygen.…”

Section: Density Modelmentioning

confidence: 99%

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Density of Bismuth Boro Zinc Glasses Using Machine Learning Techniques

Ahmed

Rajiya

Samee

et al. 2022

J Inorg Organomet Polym

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Machine learning techniques have been employed to predict the glass densities of xBi 2 O 3 –(70 − x)B 2 O 3 –20Li 2 O–5Sb 2 O 3 –5ZnO glasses using a data set of 2000 various B 2 O 3 rich glasses using their chemical composition and ionic radius. The experimental density of present glasses strongly depends on Bi 2 O 3 content which is increasing with bismuth content. The increasing density in bismuth doped glasses because the BO 3 are converted into BO 4 units, and besides BO 3 units are less heavy than the BO 4 units. The FTIR studies also confirm that the intensity of B–O–B bond decreasing with increasing Bi 2 O 3 content which suggested that B–O–B bond in bond ring isolated to BO 3 units transformed into BO 4 units. In Raman Spectra the stretching vibrations of BO 4 units shifting towards higher wavelengths with increasing Bi 2 O 3 content. This shifting conforms that there is a structural changes in the glass-matrix and borate units converting from BO 3 to BO 4 units. The prepared glasses along with B 2 O 3 rich glass data set train on various AI model such as gradient descent, Random Forest regression and Neural Networks to predict present density of glasses. Among the various models RF regression analysis model is successfully acceptable for the glass data with the highest R 2 value 0.983 which end result conform that the predicted and experimental values correlated. ANNs stood the effective technique in prediction of glass density with the optimum performance resulting with Tanh as the activation function (R 2 = 0.950). The minimum cost 0.018 obtained in the case of gradient decent function which also shows the better performance of regression model.

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Section: N4mentioning

confidence: 97%

Section: Density Modelmentioning

confidence: 99%

Density of Bismuth Boro Zinc Glasses Using Machine Learning Techniques

Ahmed

Rajiya

Samee

et al. 2022

J Inorg Organomet Polym

Self Cite

View full text Add to dashboard Cite

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“…In contrast, the contact angles of the #2, #3 and #5 glass melts were larger than that of the #1 glass melt. This implies that Li 2 O can enhance the affinity between glass melt and silicon, while SiO 2 , ZnO and Bi 2 O 3 can increase the viscosity and surface tension of the glass melt [32].…”

Section: Resultsmentioning

confidence: 99%

Effect of glass frit composition on reliability of silver paste metallization in crystalline silicon solar cells

Li,

Sun,

Xing

et al. 2024

Mater. Res. Express

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Glass frit used in conductive silver (Ag) pastes has a significant impact not only on the electrical performance but also on the long-term reliability of metallized electrodes in crystalline silicon (c-Si) solar cells. Here, we investigated the role of compositional changes on the metallization process of silver pastes by adjusting the SiO2, ZnO, Li2O, or Bi2O3 in lead borate glass melts, and performed damp heat (DH) tests in an acidic damp heat environment. It was found that the addition of Bi2O3 resulted in a decrease in conversion efficiency (Eta) of only 6.44% after the cell was treated with dilute acetic acid. Under scanning electron microscopy (SEM), it was observed that the cell with this glass frit had minimal changes in the microstructure of its silver-silicon contacts and silver electrodes. This finding helps to improve the performance and stability of solar cells in harsh environments.

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“…These glasses have undergone thorough exploration for industrial applications, including optical fiber, sensing, detection, and laser technology [3]. Bismuth oxide (Bi 2 O 3 ), a heavy metal oxide, readily forms glass in combination with B 2 O 3 [4]. Glass containing Bi 2 O 3 exhibits notable optical susceptibility, large optical basicity, considerable polarizability, and a high refractive index.…”

Section: Introductionmentioning

confidence: 99%

Ramifications of chromium-to-bismuth ions substitution on the structural and optical characteristics of bismuth borate glasses for optoelectronic applications

Moustafa,

Mokhtar,

Abdelwahed

et al. 2024

Phys. Scr.

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The exploration of optoelectronic materials with distinctive properties is still ongoing. To this end, a series of quaternary glassy materials of the composition 15Na2O–65B2O3–(20–x)Bi2O3–xCr2O3, denoted as NBBC, is synthesized using the melt quenching method, where x = 0.0, 2.0, 4.0, 6.0, 8.0, and 10.0 mol%. X-ray diffraction (XRD) confirms that the glasses under investigation are amorphous, except for the sample with a molar ratio of 10% Cr2O3, which showed a polycrystalline structure. FTIR analysis of the NBBC glasses reveals structural changes affecting Bi-O and B-O vibrations, suggesting a correlation between composition and optical properties. Interestingly, the bandgap energy of the NBBC glasses, determined optically, demonstrates a reduction from 2.881 eV to 1.941 eV with increasing Cr2O3 content. Conversely, the tail energy exhibits an opposite trend. The observed reduction in the bandgap with increasing Cr-ions is attributed to the introduction of chromium in the glassy matrix which changes the electronic structure and enhances the light absorption efficiency. Furthermore, various optical parameters are calculated, such as the optical constants, dielectric constants, loss energy, the density of coverage, sheet resistance, the figure of merit factor, and dispersion parameters. Notably, all of these parameters demonstrate a remarkable sensitivity to the gradual increment of chromium ions. These findings imply that the NBBC glasses could be appropriate for optoelectronic purposes.

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Spectroscopic studies on Li2O–MgO–Bi2O3–B2O3 glasses

Cited by 34 publications

References 43 publications

Density of Bismuth Boro Zinc Glasses Using Machine Learning Techniques

Density of Bismuth Boro Zinc Glasses Using Machine Learning Techniques

Effect of glass frit composition on reliability of silver paste metallization in crystalline silicon solar cells

Ramifications of chromium-to-bismuth ions substitution on the structural and optical characteristics of bismuth borate glasses for optoelectronic applications

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