The glass samples were prepared in accordance with the formula: (30-x)SrO–xAl₂O₃–69.8B₂O₃–0.2Cr₂O₃ (0 $\leq$ x $\leq$ 15 mol %) by melt quenching method. The absence of Bragg’s peaks confirmed the amorphous nature of the prepared glass samples. It was observed that the molar volume was increasing while the density is decreasing with increasing of Al₂O₃ content. Optical absorption study was performed to evaluate the optical bandgap, oxygen packing density, ionic packing density and Urbach energies. The Racah parameters (B and C) and D $_{q}$ /B ratio have been calculated. Fourier transform infrared (FTIR) spectra recorded in the region from 400–1600 cm $^{- 1}$ at room-temperature (RT) confirmed the formation of BO₃, BO₄ and AlO₄ groups upon the addition of strontium oxide as modifier. The Raman spectra of all the glasses recorded over continuous spectral range 200–1600 cm $^{- 1}$ exhibited different spectral bands. The EPR spectra recorded at 9.7 GHz (X-band frequency) have four resonance signals. The signal at g $\approx$ 5.33 is due to Cr $^{3 +}$ ion sites of rhombic symmetry and signal at g $\approx$ 1.97 is due to contribution from Cr $^{3 +}$ and Cr $^{5 +}$ ion pairs.

Keywords:

PACS: 81.05.Pj, 78.66.Jg, 76.30.-v, 79.30.Ly

You currently do not have access to the full text article.
Recommend the journal to your library today!

References

1. T. Sun et al., Ceram. Inter. 35, 1051 (2009). Web of Science, Google Scholar
2. A. M. Abdelghany and H. A. Elbatial, J. Non-Cryst. Solids 379, 214 (2013). Web of Science, ADS, Google Scholar
3. Samdani et al., Mat. Chem. Phys. 186, 382 (2017). Web of Science, Google Scholar
4. S. Bahammam, S. Abd El Al and F. M. Ezz-Eldin, Results Phys. 7, 241 (2017). Web of Science, ADS, Google Scholar
5. N. A. Minakova, A. V. Zaichuk and Y. I. Belyi, 65, 70 (2008). Google Scholar
6. H. A. EI Batal, F. H. EI Batal and A. M. Abdelghany, Open Spect. J. 8, 1 (2014). Google Scholar
7. A. Ramesh Babu et al., J. Non-Cryst. Solids 358, 1391 (2012). Web of Science, ADS, Google Scholar
8. J. Chen et al., J. Eur. Cer. Soc. 34, 1989 (2014). Web of Science, Google Scholar
9. B. Ahok, R. Vijaya Kumar and P. Kistaiah, J. Non-Cryst. Solids 54, 647 (2015). Google Scholar
10. A. Abd El-Moneim, I. M. Youssof and L. Abd El-Latif, Acta Mater. 54, 3811 (2006). Web of Science, ADS, Google Scholar
11. J. F. Liu, Optik. 126, 4115 (2015). Web of Science, ADS, Google Scholar
12. W. A. Weyl, J. Soc. Glass Tec. 27, 165 (1943). Google Scholar
13. H. Doweidar, J. Non-Cryst. Solids 240, 55 (1998). Web of Science, ADS, Google Scholar
14. M. Rami Reddy, S. Bangaru Raju and N. Veeraiah, Bull. Mater. Sci. 24, 63 (2001). Web of Science, Google Scholar
15. H. A. Slim, Egy. J. Solids 26, 15 (2003). Google Scholar
16. M. Gu et al., J. Lumin. 132, 2531 (2012). Web of Science, Google Scholar
17. P. Ramesh Babu et al., J. Non-Cryst. Solids 370, 21 (2013). Web of Science, Google Scholar
18. J. Hu et al., J. Phys. Chem. C 116, 15584 (2012). Web of Science, Google Scholar
19. Z. Yang et al., Chem. Commun. 47, 9131 (2011). Web of Science, Google Scholar
20. M. Rami Reddy, M. Srinivasa Reddy and N. Veeraiah, Ind. J. Pure Appl. Phys. 44, 446 (2006). Web of Science, Google Scholar
21. C. R. Kesavulu et al., J. Mol. Struct. 975, 93 (2010). Web of Science, ADS, Google Scholar
22. K. Chandra Sekhar et al., Mod. Phys. Lett. B 31, 1750180 (2017). Link, Web of Science, Google Scholar
23. H. Othman, D. Valiev and E. Polisadova, J. Mater. Sci. Mater. Electron. 28, 4647 (2017). Web of Science, Google Scholar
24. A. Duddridge et al., Phys. Chem. Glasses 44, 383 (2003). Google Scholar
25. M. Farouk et al., J. Non-Cryst. Solids 14–21, 371 (2013). Google Scholar
26. S. Inaba and S. Fujino, J. Am. Ceram. Soc. 93, 217 (2010). Web of Science, Google Scholar
27. V. Singh et al., Mater. Chem. Phys. 111, 143 (2008). Web of Science, Google Scholar
28. X. Long et al., J. Alloys Compd. 347, 52 (2002). Web of Science, Google Scholar
29. J. Tauc, Amorphous and Liquid Semiconductor (Plenum, New York, 1974). Google Scholar
30. G. Upender et al., J. Alloys Compd. 504, 468 (2010). Web of Science, Google Scholar
31. R. Iordanova et al., J. Non-Cryst. Solids 414, 42 (2015). Web of Science, ADS, Google Scholar
32. Y. B. Saddeek et al., J. Non-Cryst. Solids 454, 13 (2016). Web of Science, ADS, Google Scholar
33. G. Rama Sundari et al., Opt. Mater. 36, 1329 (2014). Web of Science, ADS, Google Scholar
34. G. Sailaja et al., Int. J. Chem. Environ. Pharm. Res. 2, 101 (2011). Google Scholar
35. J. Santhan Kumar et al., Opt. Mater. 35, 1320 (2013). Web of Science, ADS, Google Scholar
36. E. A. Kim, H. W. Choi and Y. S. Yangn, Ceram. Intern. 41, 14621 (2015). Web of Science, Google Scholar
37. I. Ardelean and S. Filip, J. Opt. Adv. Mater. 7, 745 (2005). Web of Science, Google Scholar
38. K. S. Oo et al., J. Myan. Acad. Arts Sci. 4, 276 (2006). Google Scholar
39. R. P. Sreekanth Chakradhar et al., Phys. Stat. Solidi B 242, 2919 (2005). ADS, Google Scholar
40. K. Chandra Sekhar et al., Mater. Res. Express 4, 105203 (2017), https://doi.org/10.1088/2053-1591/aa8d7e. Web of Science, Google Scholar
41. J. A. Weil and J. R. Bolton, Electron Paramagnetic Resonance Elementary Theory and Practical Applications, Vol. 194 (John Wiley, New York, 2007), p. 498. Google Scholar
42. N. W. Aschcroft and N. D. Mermin, Solid State Physics (Harcourt College Publishers, 2001), p. 656. Google Scholar
43. S. Bala Murali Krishna, P. M. Vinaya Teja and D. Krishna Rao, Mater. Res. Bull. 451, 1783 (2010). Web of Science, Google Scholar