A new family of lead–bismuthate glass with a large transmitting window

New glasses with high Li2O content have been obtained in the system Li2O–Bi2O3–PbO. The role of the different components in the glass formation has been explored from the density and thermal measurements. A wide transmitting window having sharp cut-off in both ultraviolet–visible (UV–VIS) and infrared (IR) regions for almost all compositions of these glasses has been observed, making them an appealing candidate for different spectral devices.