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- W3004114393 abstract "Abstract Our earlier studies (that include several characterization studies viz., XRD, XPS, SEM, TEM, DSC, spectroscopy, positron annihilation and dielectric studies) of Ag2O doped Na2O–Sb2O3 glass ceramics indicated that the glass ceramic containing 0.1 mol% of Ag2O is embedded with larger concentration of AgSbO3 crystal grains and such ceramic is found to be highly electrical resistant and possess larger free volume space. Moreover, AgSbO3 pyrochlore crystal phase has got plenty of ferroelectric and piezoelectric applications. In continuation to the earlier studies, the present investigation is focused on evaluation of band structure and energy band gap calculations of AgSbO3 pyrochlore crystal phase entrenched in the glass ceramic. The glasses of the composition 40Na2O–60Sb2O3 with 0.1 mol% of Ag2O were ceramicized by subjecting them for different time intervals (24–100 h) of heat treatment at 830 °C. XRD and XPS techniques were used to characterize samples. The results of these studies indicated the predominant presence of AgSbO3 pyrochlore crystal phase in the samples heat treated for 100 h. The calculations of the structural and electronic properties of defective pyrochlore AgSbO3 crystal phase were performed using the CASTEP program with the local density approximation. The calculated lattice constant is turned out to be 10.16978 A and the indirect band gap is estimated to be 0.227 eV. The value of this band gap is found to be far below from the experimental value. The reasons for such low value have been identified and discussed." @default.
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- W3004114393 date "2020-03-01" @default.
- W3004114393 modified "2023-10-16" @default.
- W3004114393 title "Energy band structure and optical band gap calculations of AgSbO3 photo-catalystic pyrochlore crystal phase embedded in Ag2O doped sodium antimonate glass ceramics" @default.
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- W3004114393 doi "https://doi.org/10.1016/j.ijleo.2020.164345" @default.
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