Effect of annealing temperature on the elastic properties of bismuth phosphate glasses

摘要

The structure of binary phosphate glasses has been studied by measurements of the compositional dependence of the refractive index, molar volume, and optical dispersion by Kordes el al. [1]. They divided two-component phosphate glasses into normal and anomalous glasses, depending upon their properties. In the case of normal glasses, i.e. phosphate glasses containing oxides of Na, Ca, Ba, Cd and Pb, a number of physical properties (density, molar volume, refractive index, etc.) change continuously as a function of composition over the entire vitreous range. In the anomalous glasses, namely, the ZnO-P_2O_2 and MgO-P_2O_2 systems, the properties show discontinuities at about 50 mol % of the metal oxide.