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Effect of CaO/MgO ratio on the optical and theoretical parameters of alumino‐borosilicate glasses
Author(s) -
Kaur Mandeep,
Kaur Gurbinder,
Pandey Om Prakash,
Kumar Vishal
Publication year - 2019
Publication title -
international journal of applied glass science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 34
eISSN - 2041-1294
pISSN - 2041-1286
DOI - 10.1111/ijag.12667
Subject(s) - materials science , electronegativity , band gap , analytical chemistry (journal) , electron paramagnetic resonance , fourier transform infrared spectroscopy , molar volume , ionic bonding , borosilicate glass , polarizability , ion , nuclear magnetic resonance , optics , chemistry , thermodynamics , physics , optoelectronics , organic chemistry , chromatography , molecule , composite material
Abstract Glass series (10+ x )CaO–(10− x )MgO–10SrO–10B 2 O 3 –20Al 2 O 3 –40SiO 2 ( x = 0, 2.5, 5, 7.5) has been prepared by melt quenching technique. Influence of CaO/MgO ( R ) ratio on the properties like density/molar volume has been investigated and correlation has been established between them. The theoretical parameters like electronegativity of metal ion/oxide ion, ionic concentration, interionic distance, optical basicity, and polarizability have also been obtained. The optical properties such as band gap, Urbach energy, and band positions of pristine as well as heat‐treated glasses have been studied using UV‐visible and Fourier transform infrared spectroscopy ( FTIR ), respectively. Electron paramagnetic resonance ( EPR ) spectra are obtained to find the values of spin Hamiltonian parameters ( g values) for all the glass samples. It could be observed that with the increase in CaO content or R ratio, heat‐treated glasses exhibit direct band gap within 5.92‐6.01 eV range. The Urbach energy lies within the 0.62‐0.86 eV range for all the heat‐treated glass samples.