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Structural and Thermal Properties of Quaternary B2O3 ? Na2O ? RO?MnO2 (R=Mg, Zn, Cd) Glasses
Subject area: Physical Sciences and Environment · Area of research: Spectroscopy
Abstract
The quaternary glass systems of B2O3 ? Na2O ? RO ? MnO2 (R=Mg, Zn, Cd) with different compositions of MnO2 are prepared by melt-quenching technique. Amorphous nature of these glasses has been confirmed from their XRD profiles. Density of all the glass samples is measured using relative measurement method. FTIR spectra of these glasses are recorded over a continuous spectral range (4000 ? 400 cm-1) as an attempt to study their structural units. Thermal properties of the glasses are studied using differential thermal analysis. The longitudinal and shear ultrasonic velocities are measured for all the compositions at 303K and at 10MHz frequency using the Pulse Echo Overlap method. Elastic moduli and other parameters such as molar volume, Poisson?s ratio, acoustic impedance, microhardness and Debye temperature are calculated from density and velocity data, and they are used to gain knowledge about the structural and mechanical properties of these glasses, and are correlated with the rigidity and compactness of the glass systems
Keywords
XRD, FTIR, -DTA and Ultrasonic Studies
References
[1] CONCLUSION
[2] The density, ultrasonic velocities, elastic moduli and other parameters decrease with the addition of MnO2 content upto 3 mol%. this shows a decrease in the connectivity of the glass network while on further addition of MnO2, all these parameters and hence connectivity of the network increase.
[3] Poisson’s ratio indicates that MnO2 is effective in the formation of cross-linking between cations for above 3 mol%, which contributes to the increase in stiffness and rigidity of the glass.
[4] MnO2 plays a role of glass modifier at lower composition, while it exhibits glass former at high concentration in the studied glasses.
[5] BNRMn glasses with MgO content have high covalent character in the glass network and produce more compact glass structure.
[6] IR spectra confirm the presence of borate and manganese structural units.
[7] it is found from thermal properties that manganese ions are incorporated in the glass network as network modified and network former. This behavior depends on the variation of composition and nature of the components.
How to cite this paper
@article{1712275,
author = {R. Amaravel, L. Balu, R. Ezhil Pavai, T Kavitha, R Bhuvaneshwari},
title = {Structural and Thermal Properties of Quaternary B2O3 ? Na2O ? RO?MnO2 (R=Mg, Zn, Cd) Glasses},
journal = {Iconic Research And Engineering Journals},
year = {2025},
volume = {9},
number = {5},
pages = {1717-1735},
issn = {2456-8880},
url = {https://www.irejournals.com/formatedpaper/1712275.pdf},
abstract = {The quaternary glass systems of B2O3 ? Na2O ? RO ? MnO2 (R=Mg, Zn, Cd) with different compositions of MnO2 are prepared by melt-quenching technique. Amorphous nature of these glasses has been confirmed from their XRD profiles. Density of all the glass samples is measured using relative measurement method. FTIR spectra of these glasses are recorded over a continuous spectral range (4000 ? 400 cm-1) as an attempt to study their structural units. Thermal properties of the glasses are studied using differential thermal analysis. The longitudinal and shear ultrasonic velocities are measured for all the compositions at 303K and at 10MHz frequency using the Pulse Echo Overlap method. Elastic moduli and other parameters such as molar volume, Poisson?s ratio, acoustic impedance, microhardness and Debye temperature are calculated from density and velocity data, and they are used to gain knowledge about the structural and mechanical properties of these glasses, and are correlated with the rigidity and compactness of the glass systems},
keywords = {XRD, FTIR, -DTA and Ultrasonic Studies},
month = {November},
doi = {https://doi.org/10.64388/IREV9I5-1712275}
}