Abstract
The structure and properties of glasses in the 30Na2O–xV2O5–(70 – x)B2O3 system for x varying from 30 to 47.5 mol % were studied using experimental approaches and non-constant force field molecular dynamics. The replacement of boron oxide by vanadium oxide was found to decrease the glass transition temperature and the thermal stability of glasses. According to the results of infrared spectroscopy, over the whole range of concentrations studied, there is no significant changes in the type of structural groups that form the glass network. This conclusion is supported by the absence of abnormal changes in the concentration dependences of characteristic temperatures and conductivity, which monotonically increases with increasing V2O5 content. The procedure of glass self-assembly from a melt in the non-constant force field molecular dynamic simulation was used for the first time to obtain the structural model. The interatomic distances between the vanadium cations and the trajectories of ion motion in the system were determined. The conductivity was found to be due to electron transfer.
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