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A. ABOU SHAMA1,* , M. BAKR MOHAMED1, K. EL-SAYED1
- XRD Unit, Physics Department, Faculty of Science, Ain Shams University, 11566 Abbassia, Cairo, Egypt
The Cr2O3 doped Oxyfluroborate Glasses (0.55B2O3-0.15NaF-0.30ZnO-xCr2O3, x=0.0, 0.1, 0.2 and 0.3 mol%) were prepared by the conventional rapid quenching technique. Raman spectroscopy and X-ray scattering were applied to investigate the present glasses. The X-Ray radial distribution function analysis (RDF) showed that the short range order (SRO) of the matrix containing ZnO4 units is located at nearly 2.0Å, the medium range order (MRO) of the matrix containing the Na-O pairs of the tetrahedral form NaO4 is located at 3.53Å for the undoped sample but with smaller distances, 3.45, 3.37, 3.44Å for the doped Cr2O3 samples. The next RDF peaks in the MRO revealed the presence of Zn-Zn and Na-Na atomic pairs of octahedral arrangement at average distances of 4.39 and 5.195Å respectively. The B-O correlations are not observed in the RDF results, while ZnO4 units are clearly observed in both previous techniques. A correlation of X-ray radial distribution and Raman spectroscopy is established for the present investigated glasses..
Cr2O3 Oxyfluroborate Glasses, Octahedral arrangement, Amorphous materials, Radial distribution function, Raman spectroscopy.
Submitted at: July 8, 2014
Accepted at: Feb. 10, 2016
A. ABOU SHAMA, M. BAKR MOHAMED, K. EL-SAYED, The role of doping Cr2O3 on the structural modification of oxyfluroborate glasses using X-Ray and Raman Spectroscopy, Journal of Optoelectronics and Advanced Materials Vol. 18, Iss. 1-2, pp. 118-122 (2016)
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