Elastic properties and structural studies on lead-boro-vanadate glasses |
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Authors: | C. Narayana Reddy R.P. Sreekanth Chakradhar |
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Affiliation: | a Department of Physics, PES College (Affiliated to Bangalore University), Bangalore 560050, India b ICMCB/ENSCPB, University of Bordeaux, cedex 33604, France c Glass Technology Laboratory, Central Glass & Ceramic Research Institute, Kolkata 700 032, India |
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Abstract: | This paper describes elastic properties and spectroscopic studies on the xPbO-50B2O3-(50 - x)V2O5 (where x = 20, 25, 30, 35, 40, 45 and 49 mol%) glass system. Elastic moduli and spectroscopic parameters exhibit compositional dependent trends and the existence of characteristic borovanadate groups in these glasses. The bulk modulus and shear modulus increase with the concentration of [BO4/2]− and [B2V2O9]2− groups, which increases the dimensionality of the network. The scheme of modification of borate and vanadate groups has been explained by considering the Sanderson’s electronegativity principle. Analysis of infrared(IR) and magic angle spinning-nuclear magnetic resonance (MAS-NMR) spectra suggests the presence of characteristic diborovanadate groups also in these glasses. The results are examined in view of the structural groups formed due to the presence of PbO as a modifier. |
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Keywords: | 64.70 Pf 61.43 Fs 33.20 Ea 62.65 +k 61.18 Fs |
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