Tellurite glasses containing silver and vanadium oxides: quantitative analysis of elastic moduli.
A. Abd El-Moneim; Mohammed D. Alenezy; A. A. El-Namrouty; M. H. Badawi; E. G. El-Metwally;
Abstract
Ring deformation and bond compression models are used to analyze quantitatively room temperature elastic moduli of Ag2O- V2O5- TeO2 glasses system, where and . The main parameters in the analysis are estimated atomic ring size, average cross-link density, first-order stretching force constant and theoretical bond compression bulk modulus . Structural changes are deduced by relating the ratio to both molar volume and atomic ring size of glasses. It is found that increasing of Ag2O concentration open the glass structure by breaking V-O-Te linkages and creating non-bridging oxygen atoms (NBOs) according to the reaction: Ag2O + Te–eqOax–V Te–eqO- Ag+ (or Te–axO- Ag+) + V–O- Ag+. In addition, Ag2O-V2O5-TeO2 glasses have a relatively closed (small-ringed) structure when compared to Ag2O-B2O3-TeO2, B2O3-SiO2, Na2O-B2O3-SiO2 or Na2O-K2O-CaO-PbO-SiO2 glasses.
Other data
| Title | Tellurite glasses containing silver and vanadium oxides: quantitative analysis of elastic moduli. | Authors | A. Abd El-Moneim; Mohammed D. Alenezy; A. A. El-Namrouty; M. H. Badawi; E. G. El-Metwally | Issue Date | Oct-2011 | Publisher | Society of Glass Technology | Journal | Physics and Chemistry of Glasses - European Journal of Glass Science and Technology Part B | Volume | 52 | Issue | 5 | Start page | 193 | End page | 199 |
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